NSC PC87366-IBW-VLA, PC87366-ICK-VLA Datasheet

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PC87366 128-Pin LPC SuperI/O with System Hardware Monitoring, MIDI and Game Ports

General Description

The PC87366, a member of National Semiconductor’s 128-pin LPC SuperI/O family, combines National’s System Hardware MonitoringcapabilitywithaMusicalInstrument Digital Interface (MIDI) Port and game port inputs for up to two joysticks. The PC87366 is PC99 and ACPI compliant, and offers a singlechip solution to the most commonly used PC I/O peripherals.

System Hardware Monitoring provides minimum power consumption and maximum operating efficiency within the system environment.It integrates National’s diode-basedor thermistorbasedTemperature Sensor (TMS) with National’sVoltage Level Monitor (VLM) for full, PC system thermal control. The PC87366 monitors system voltages using 8-bit Analog to Digital (A/D)conversion with seven analog input channels and four internal measuring points.

The PC87366 also incorporates: Fan Speed Control and Monitor (FSCM) for three fans, extended wake-up support fora wide range of wake-up events, system design protection features, a Floppy Disk Controller (FDC), a Keyboard and Mouse Controller (KBC), a full IEEE 1284 Parallel Port, two enhanced Serial Ports (UARTs), one with Infrared (IR) support, ACCESS.bus

Interface (ACB), System Wake-Up Control (SWC), General-Purpose Input/Output (GPIO) support for40 ports, Interrupt Serializer forParallel IRQsand an enhanced WATCHDOG timer (WDT).

Outstanding Features

●

System Hardware Monitoring including: — Diode-based or thermistor-based Temperature Sen-

sor (TMS)

— Voltage Level Monitor (VLM) with VID inputs

●

MIDI interface compatible with MPU-401 UART mode

●

Game port inputs for up to two joysticks

●

Extended Wake-Up support, including legacy/ACPI power button support, direct power supply control in response to wake-up events, power-fail recovery

●

Protection features, including chassis intrusion detection, GPIO lock and pin configuration lock

●

Fan Speed Control and Monitor for three fans

●

Serial IRQ support (15 options)

●

Interrupt Serializer (11 Parallel IRQs to Serial IRQ)

●

Bus interface, based on Intel’s

LPC Interface Speciﬁ-

cation

Revision 1.0, September 29th, 1997

●

ACCESS.bus interface, SMBus physical layer compatible

●

40 GPIO Ports (29 standard, including 15 with Assert IRQ/

SMI/PWUREQs interrupts; 11 VSB-powered)

●

Blinking LEDs

●

128-pin PQFP Package

Block Diagram

System Wake-Up

Serial Port 2

IEEE 1284

Parallel Port

Ports

Keyboard &

Mouse I/F

SCL

ACCESS.bus

Floppy Disk

Controller

Floppy Drive

Interface

Keyboard &

Serial Infrared

Interface Interface

Control

Bus

Interface

LPC

Interface

I/O

3 Control

WATCHDOG

Timer

WDO

Serial Port 1

Serial

Interface

Outputs

Fan Speed

Control & Monitor

Interface

Mouse Controller

with IR

GPIO Ports

3 Monitor

Inputs

SDA

Serial

IRQ

Analog

Inputs

System

Parallel Port

Interface

Diode

Interfac

SMI

Ports

Hardware

Monitoring

REF

MIDI

Interface

MIDI &

Game Ports

Game Inputs

Wake-Up

Events

PWUREQ

Power Control

BdAT

ACCESS.bus® is a registered trademark of Digital Equipment Corporation. I2C® is a registered trademark of Philips Corporation. IBM®, MicroChannel®, PC-AT® and PS/2® are registered trademarks of International Business Machines Corporation. Microsoft® and Windows® are registered trademarks of Microsoft Corporation. TRI-STATE® is a registered trademark of National Semiconductor Corporation. WATCHDOG‰ is a trademark of National Semiconductor Corporation. SMBus® is a registered trademark of Intel Corporation.

1999 National Semiconductor Corporation

PRELIMINARY

January 11, 1999

PC87366 128-Pin LPC SuperI/O with System Hardware Monitoring, MIDI and Game Ports

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Features

• Voltage Level Monitor (VLM)

— Seven analog inputs that can support both positive

and negative voltages

— Four internal measuring points — Three thermistor-based temperature monitoring

channels

— Internal or external V

REF

— VID inputs — Meets ACPI and DMI requirements for system volt-

age monitoring

• Temperature Sensor (TMS)

— Up to two remote diode inputs — Environment temperature sensing via an internal di-

ode

— A/D analog channels provide thermal inputs to di-

rectly sense die temperature of remote diodes

— Meets ACPI and DMI requirements forthermal man-

agement

— Standby mode to minimize power consumption

• Extended Wake-Up

— Legacy and ACPI power button support — Direct power supply control in response to wake-up

events

— Power-fail recovery

• Musical Instrument Digital Interface (MIDI) Port

— Compatible with MPU-401 UART mode — 16-byte Receive and Transmit FIFOs — Loopback mode support

●

Game Port

— Full digital implementation — Supports up to two analog joysticks

• Protection

— Chassis intrusion detection (CHASI, CHASO) — GPIO lock — Pin conﬁguration lock

• 40 General-Purpose I/O (GPIO) Ports

— 29 standard, with Assert IRQ/

SMI/PWUREQ for 15

ports

— 11 V

-powered

— Programmable drive type for each output pin (open-

drain, push-pull or output disable)

— Programmable option for internal pull-up resistor on

each input pin

— Output lock option — Input debounce mechanism

• Fan Speed Control and Fan Speed Monitor (FSCM)

— Supports different fan types — Speed monitoring for three fans

❏ Digital ﬁltering of the tachometer input signal ❏ Alarm for fan slower than programmable thresh-

old speed

❏ Alarm for fan stop

— Three speed control lines with Pulse Width Modula-

tion (PWM)

❏ Output signal in the range of 6 Hz to 93.75 KHz ❏ Duty cycle resolution of 1/256

• LPC System Interface

— Synchronous cycles, up to 33 MHz bus clock — 8-bit I/O cycles — Up to four DMA channels — 8-bit DMA cycles — Basic read, write and DMA bus cycles are 13 clock

cycles long

• PC99 and ACPI Compliant

— PnP Conﬁguration Register structure — Flexible resource allocation for all logical devices

❏ Relocatable base address ❏ 15 IRQ routing options ❏ 4 optional 8-bit DMA channels (where applicable)

• Floppy Disk Controller (FDC)

— Programmable write protect — FM and MFM mode support — Enhanced mode command for three-mode Floppy

Disk Drive (FDD) support

— Perpendicular recording drive support for 2.88 MB — Burst and non-burst modes — Full support for IBM Tape Drive register (TDR) im-

plementation of AT and PS/2 drive types

— 16-byte FIFO — Software compatible with the PC8477, which con-

tains a superset of the FDC functions in the microDP8473, the NEC microPD765A and the N82077

— High-performance, digital separator — Standard 5.25” and 3.5” FDD support

• Parallel Port

— Software or hardware control — Enhanced Parallel Port (EPP) compatible with new

version EPP 1.9 and IEEE 1284 compliant

— EPP support for versionEPP 1.7 of the Xircom spec-

iﬁcation

— EPP support as mode 4 of the Extended Capabilities

Port (ECP)

— IEEE 1284 compliant ECP, including level 2 — Selection of internal pull-up or pull-down resistor for

Paper End (PE) pin

— PCI bus utilization reduction by supporting a de-

mand DMA mode mechanism and a DMA fairness mechanism

— Protection circuit that prevents damage to the paral-

lel port when a printer connected to it powers up or is operated at high voltages, even if the device is in power-down

— Output buffers that can sink and source 14 mA

• Serial Port 1 (UART1)

— Software compatible with the 16550A and the 16450

Features (Continued)

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— Shadow register support for write-only bit monitoring — UART data rates up to 1.5 Mbaud

• Serial Port 2 with Infrared (UART2)

— Software compatible with the 16550A and the 16450 — Shadow register support for write-only bit monitoring — UART data rates up to 1.5 Mbaud — HP-SIR — ASK-IR option of SHARP-IR — DASK-IR option of SHARP-IR — Consumer Remote Control supports RC-5, RC-6,

NEC, RCA and RECS 80

— Non-standard DMA support − 1 or 2 channels — PnP dongle support

• Keyboard and Mouse Controller (KBC)

— 8-bit microcontroller — Software compatible with the 8042AH andPC87911

microcontrollers

— 2 KB custom-designed program ROM — 256 bytes RAM for data — Five programmable dedicated open-drain I/O lines — Asynchronous access to two data registers and one

status register during normal operation

— Support for both interrupt and polling — 93 instructions — 8-bit timer/counter — Support for binary and BCD arithmetic — Operation at 8 MHz,12MHz or 16 MHz (programma-

ble option)

— Can be customized by using the PC87323,which in-

cludes a RAM-based KBC as a development platform for KBC code

• ACCESS.bus Interface (ACB)

— Serial interface compatible with SMBus physical layer — Compatible with Philips’ I

2C®

— ACB master and slave — Supports polling and interrupt controlled operation — Optional internal pull-up on SDA and SCL pins

• WATCHDOG Timer (WDT)

— Times out the system based on user-programmable

time-out period

— System power-down capability for power saving — User-deﬁned trigger events to restart WATCHDOG — Optional routing of WATCHDOG output on IRQ

and/or SMI lines

• System Wake-Up Control (SWC)

— Power-up request upon detection of Keyboard,

Mouse, RI1, RI2, RING activity and General-Purpose Input Events, as follows:

❏ Preprogrammed Keyboard or Mouse sequence ❏ External modem ring on serial port ❏ Ring pulse or pulse train on the

RING input signal

❏ Preprogrammed CEIR address in a preselected

standard (NEC, RCA or RC-5)

❏ General-Purpose Input Events ❏ IRQs of internal logical devices

— Optional routing of power-up request on IRQ, SMI

and/or

PWBTOUT

— Battery-backed event conﬁguration — Programmable V

-powered output for blinking

LEDs (LED1, LED2) control

• Clock Sources

— 48 MHz clock input — LPC clock, up to 33 MHz — On-chip low frequency clock generator for wake-up

• Power Supplies

— 3.3V supply operation — Main (V

and AVDD)

— Standby (V

)

— Battery backup (V

BAT

)

— All pins are 5V tolerant and back-drive protected, ex-

cept LPC bus pins

• Strap Configuration

— Base Address (BADDR) strap to determinethe base

address of the Index-Data register pair

— Test strap to force the device into test mode (re-

served for National Semiconductor use)

— Power Supply and LED Conﬁguration (PSLDC0,1)

straps to determine the power suppy control functions and the V

power-up defaults of LED2

— Power Supply On Polarity (PSONPOL) strap to set

PSON active state and output type

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Datasheet Revision Record

Revision Date Status Comments

November 1998 Draft 0.3 Speciﬁcation subject to change without notice; MIDI and

Game Port information is incomplete

January 1999 Preliminary 1.0 Speciﬁcation subject to change without notice; Power

Supply Control and LED sections in Chapter 2 are incomplete

Item Topic Change/Correction Location

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Table of Contents

Datasheet Revision Record ............................................................................................................4

...........................................................................................................................................................................4

1.0 Signal/Pin Connection and Description

1.1 CONNECTION DIAGRAM .........................................................................................................16

1.2 BUFFER TYPES AND SIGNAL/PIN DIRECTORY ....................................................................17

1.3 PIN MULTIPLEXING .................................................................................................................22

1.4 DETAILED SIGNAL/PIN DESCRIPTIONS ................................................................................24

1.4.1 ACCESS.bus Interface (ACB) ....................................................................................24

1.4.2 Bus Interface ...............................................................................................................24

1.4.3 Clock ............................................................................................................................24

1.4.4 Fan Speed Control and Monitor (FSCM) .....................................................................24

1.4.5 Floppy Disk Controller (FDC) ......................................................................................25

1.4.6 Game Port ..................................................................................................................26

1.4.7 General-Purpose Input/Output (GPIO) Ports ...............................................................26

1.4.8 Infrared (IR) .................................................................................................................26

1.4.9 Keyboard and Mouse Controller (KBC) .....................................................................27

1.4.10 Musical Instrument Digital Interface (MIDI) Port ..........................................................27

1.4.11 Parallel Port ...............................................................................................................28

1.4.12 Power and Ground .....................................................................................................28

1.4.13 Protection ....................................................................................................................29

1.4.14 Serial Port 1 and Serial Port 2 .....................................................................................29

1.4.15 Strap Configuration ......................................................................................................30

1.4.16 System Hardware Monitoring ......................................................................................30

1.4.17 System Wake-Up Control ............................................................................................31

1.4.18 WATCHDOG Timer (WDT) .........................................................................................31

1.5 INTERNAL PULL-UP AND PULL-DOWN RESISTORS ............................................................32

2.0 Device Architecture and Configuration

2.1 OVERVIEW ...............................................................................................................................34

2.2 CONFIGURATION STRUCTURE AND ACCESS .....................................................................34

2.2.1 The Index-Data Register Pair ......................................................................................34

2.2.2 Banked Logical Device Registers Structure ................................................................36

2.2.3 Standard Logical Device Configuration Register Definitions .......................................37

2.2.4 Standard Configuration Registers ...............................................................................39

2.2.5 Default Configuration Setup ........................................................................................40

2.2.6 Power States ...............................................................................................................40

2.2.7 Address Decoding .......................................................................................................41

2.3 PROTECTION ...........................................................................................................................41

2.3.1 Chassis Intrusion Detection .........................................................................................41

2.3.2 Pin Configuration Lock ................................................................................................41

2.3.3 GPIO Pin Function Lock ..............................................................................................42

2.4 POWER SUPPLY CONTROL (PSC) .........................................................................................42

2.5 LED OPERATION AND STATES ..............................................................................................44

(Continued)

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2.6 POWER SUPPLY CONTROL AND LED CONFIGURATION ....................................................44

2.7 REGISTER TYPE ABBREVIATIONS ........................................................................................45

2.8 SUPERI/O CONFIGURATION REGISTERS .............................................................................45

2.8.1 SuperI/O ID Register (SID) ..........................................................................................46

2.8.2 SuperI/O Configuration 1 Register (SIOCF1) ..............................................................46

2.8.3 SuperI/O Configuration 2 Register (SIOCF2) ..............................................................47

2.8.4 SuperI/O Configuration 3 Register (SIOCF3) ..............................................................48

2.8.5 SuperI/O Configuration 4 Register (SIOCF4) ..............................................................49

2.8.6 SuperI/O Configuration 5 Register (SIOCF5) ..............................................................50

2.8.7 SuperI/O Revision ID Register (SRID) ........................................................................50

2.8.8 SuperI/O Configuration 8 Register (SIOCF8) ..............................................................51

2.8.9 SuperI/O Configuration A Register (SIOCFA) .............................................................52

2.8.10 SuperI/O Configuration B Register (SIOCFB) .............................................................53

2.8.11 SuperI/O Configuration C Register (SIOCFC) .............................................................54

2.8.12 SuperI/O Configuration D Register (SIOCFD) .............................................................55

2.9 FLOPPY DISK CONTROLLER (FDC) CONFIGURATION ........................................................56

2.9.1 General Description .....................................................................................................56

2.9.2 Logical Device 0 (FDC) Configuration .........................................................................56

2.9.3 FDC Configuration Register ........................................................................................57

2.9.4 Drive ID Register .........................................................................................................58

2.10 PARALLEL PORT CONFIGURATION ......................................................................................59

2.10.1 General Description .....................................................................................................59

2.10.2 Logical Device 1 (PP) Configuration ............................................................................60

2.10.3 Parallel Port Configuration Register ............................................................................60

2.11 SERIAL PORT 2 CONFIGURATION .........................................................................................61

2.11.1 General Description .....................................................................................................61

2.11.2 Logical Device 2 (SP2) Configuration ..........................................................................61

2.11.3 Serial Port 2 Configuration Register ............................................................................61

2.12 SERIAL PORT 1 CONFIGURATION .........................................................................................62

2.12.1 Logical Device 3 (SP1) Configuration ..........................................................................62

2.12.2 Serial Port 1 Configuration Register ............................................................................62

2.13 SYSTEM WAKE-UP CONTROL (SWC) CONFIGURATION .....................................................63

2.13.1 Logical Device 4 (SWC) Configuration ........................................................................63

2.14 KEYBOARD AND MOUSE CONTROLLER (KBC) CONFIGURATION .....................................64

2.14.1 General Description .....................................................................................................64

2.14.2 Logical Devices 5 and 6 (Mouse and Keyboard) Configuration ..................................65

2.14.3 KBC Configuration Register ........................................................................................66

2.15 GENERAL-PURPOSE INPUT/OUTPUT (GPIO) PORTS CONFIGURATION ..........................67

2.15.1 General Description .....................................................................................................67

2.15.2 Implementation ............................................................................................................67

2.15.3 Logical Device 7 (GPIO) Configuration .......................................................................68

2.15.4 GPIO Pin Select Register ............................................................................................69

2.15.5 GPIO Pin Configuration Register .................................................................................70

2.15.6 GPIO Event Routing Register ......................................................................................71

(Continued)

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2.16 ACCESS.BUS INTERFACE (ACB) CONFIGURATION ............................................................72

2.16.1 General Description .....................................................................................................72

2.16.2 Logical Device 8 (ACB) Configuration .........................................................................72

2.16.3 ACB Configuration Register ........................................................................................73

2.17 FAN SPEED CONTROL AND MONITOR (FSCM) CONFIGURATION .....................................74

2.17.1 General Description .....................................................................................................74

2.17.2 Logical Device 9 (FSCM) Configuration ......................................................................74

2.17.3 Fan Speed Control and Monitor Configuration 1 Register ...........................................75

2.17.4 Fan Speed Control and Monitor Configuration 2 Register ...........................................76

2.17.5 Fan Speed Control OTS Configuration Register .......................................................76

2.18 WATCHDOG TIMER (WDT) CONFIGURATION ......................................................................77

2.18.1 Logical Device 10 (WDT) Configuration ......................................................................77

2.18.2 WATCHDOG Timer Configuration Register ................................................................77

2.19 GAME PORT (GMP) CONFIGURATION ..................................................................................78

2.19.1 Logical Device 11 (GMP) Configuration ......................................................................78

2.19.2 Game Port Configuration Register ..............................................................................78

2.20 MIDI PORT (MIDI) CONFIGURATION ......................................................................................79

2.20.1 Logical Device 12 (MIDI) Configuration .......................................................................79

2.20.2 MIDI Port Configuration Register .................................................................................79

2.21 VOLTAGE LEVEL MONITOR (VLM) CONFIGURATION ..........................................................80

2.21.1 Logical Device 13 (VLM) Configuration .......................................................................80

2.22 TEMPERATURE SENSOR (TMS) CONFIGURATION .............................................................80

2.22.1 Logical Device 14 (TMS) Configuration .......................................................................80

3.0 System Wake-Up Control (SWC)

3.1 OVERVIEW ...............................................................................................................................81

3.2 FUNCTIONAL DESCRIPTION ..................................................................................................82

3.3 EVENT DETECTION .................................................................................................................83

3.3.1 Modem Ring ................................................................................................................83

3.3.2 Telephone Ring ...........................................................................................................83

3.3.3 Keyboard and Mouse Activity ......................................................................................84

3.3.4 CEIR Address ..............................................................................................................84

3.3.5 Standby General-Purpose Input Events ......................................................................84

3.3.6 GPIO-Triggered Events ...............................................................................................84

3.3.7 Software Event ............................................................................................................84

3.3.8 Module IRQ Wake-Up Event .......................................................................................85

3.4 SWC REGISTERS .....................................................................................................................85

3.4.1 SWC Register Map ......................................................................................................85

3.4.2 Wake-Up Events Status Register 0 (WK_STS0) .........................................................88

3.4.3 Wake-Up Events Status Register (WK_STS1) ............................................................89

3.4.4 Wake-Up Events Enable Register (WK_EN0) .............................................................90

3.4.5 Wake-Up Events Enable Register 1 (WK_EN1) ..........................................................91

3.4.6 Wake-Up Configuration Register (WK_CFG) ..............................................................92

3.4.7 Wake-Up Events Routing to SMI Enable Register 0 (WK_SMIEN0) ...........................93

(Continued)

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3.4.8 Wake-Up Events Routing to SMI Enable Register 1 (WK_SMIEN1) ...........................94

3.4.9 Wake-Up Events Routing to IRQ Enable Register 0 (WK_IRQEN0) ...........................95

3.4.10 Wake-Up Events Routing to IRQ Enable Register 1 (WK_IRQEN1) ...........................96

3.4.11 Wake-Up Extension 1 Enable Register 0 (WK_X1EN0) ..............................................97

3.4.12 Wake-Up Extension 1 Enable Register 1 (WK_X1EN1) ..............................................98

3.4.13 Wake-Up Extension 2 Enable Register 0 (WK_X2EN0) ..............................................99

3.4.14 Wake-Up Extension 2 Enable Register 1 (WK_X2EN1) ............................................100

3.4.15 Wake-Up Extension 3 Enable Register 0 (WK_X3EN0) ............................................101

3.4.16 Wake-Up Extension 3 Enable Register 1 (WK_X3EN1) ............................................102

3.4.17 PS/2 Keyboard and Mouse Wake-Up Events ............................................................103

3.4.18 PS/2 Protocol Control Register (PS2CTL) .................................................................104

3.4.19 Keyboard Data Shift Register (KDSR) .......................................................................104

3.4.20 Mouse Data Shift Register (MDSR) ...........................................................................105

3.4.21 PS/2 Keyboard Key Data Registers (PS2KEY0 - PS2KEY7) ....................................105

3.4.22 CEIR Wake-Up Control Register (IRWCR) ...............................................................106

3.4.23 CEIR Wake-Up Address Register (IRWAD) ..............................................................107

3.4.24 CEIR Wake-Up Address Mask Register (IRWAM) ....................................................107

3.4.25 CEIR Address Shift Register (ADSR) ........................................................................108

3.4.26 CEIR Wake-Up Range 0 Registers ...........................................................................108

3.4.27 CEIR Wake-Up Range 1 Registers ...........................................................................109

3.4.28 CEIR Wake-Up Range 2 Registers ...........................................................................109

3.4.29 CEIR Wake-Up Range 3 Registers ...........................................................................110

3.4.30 Standby General-Purpose I/O (SBGPIO) Register Overview ....................................111

3.4.31 Standby GPIO Pin Select Register (SBGPSEL) ........................................................114

3.4.32 Standby GPIO Pin Configuration Register (SBGPCFG) ...........................................115

3.4.33 Standby GPIOE/GPIE Data Out Register 0 (SB_GPDO0) ........................................117

3.4.34 Standby GPIOE/GPIE Data In Register 0 (SB_GPDI0) ............................................117

3.4.35 Standby GPOS Data Out Register 1 (SB_GPDO1) ..................................................118

3.4.36 Standby GPIS Data In Register 1 (SB_GPDI1) .........................................................118

3.5 SWC REGISTER BITMAP .......................................................................................................119

4.0 Fan Speed Control

4.1 OVERVIEW .............................................................................................................................123

4.2 FUNCTIONAL DESCRIPTION ................................................................................................123

4.3 FAN SPEED CONTROL REGISTERS ....................................................................................124

4.3.1 Fan Speed Control Register Map ..............................................................................124

4.3.2 Fan Speed Control Pre-Scale Register (FCPSR) ......................................................124

4.3.3 Fan Speed Control Duty Cycle Register (FCDCR) ....................................................125

4.4 FAN SPEED CONTROL BITMAP ...........................................................................................125

5.0 Fan Speed Monitor

5.1 OVERVIEW .............................................................................................................................126

5.2 FUNCTIONAL DESCRIPTION ................................................................................................126

5.3 FAN SPEED MONITOR REGISTERS .....................................................................................127

5.3.1 Fan Speed Monitor Register Map ..............................................................................127

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5.3.2 Fan Monitor Threshold Register (FMTHR) ................................................................128

5.3.3 Fan Monitor Speed Register (FMSPR) ......................................................................128

5.3.4 Fan Monitor Control and Status Register (FMCSR) ..................................................128

5.4 FAN SPEED MONITOR BITMAP ............................................................................................129

6.0 General-Purpose Input/Output (GPIO) Port

6.1 OVERVIEW .............................................................................................................................130

6.2 BASIC FUNCTIONALITY ........................................................................................................131

6.2.1 Configuration Options ................................................................................................131

6.2.2 Operation ...................................................................................................................131

6.3 EVENT HANDLING AND SYSTEM NOTIFICATION ..............................................................132

6.3.1 Event Configuration ...................................................................................................132

6.3.2 System Notification ....................................................................................................132

6.4 GPIO PORT REGISTERS .......................................................................................................133

6.4.1 GPIO Pin Configuration (GPCFG) Register ..............................................................134

6.4.2 GPIO Pin Event Routing (GPEVR) Register .............................................................135

6.4.3 GPIO Port Runtime Register Map .............................................................................135

6.4.4 GPIO Data Out Register (GPDO) ..............................................................................136

6.4.5 GPIO Data In Register (GPDI) ..................................................................................136

6.4.6 GPIO Event Enable Register (GPEVEN) ..................................................................137

6.4.7 GPIO Event Status Register (GPEVST) ....................................................................137

7.0 WATCHDOG Timer (WDT)

7.1 OVERVIEW .............................................................................................................................138

7.2 FUNCTIONAL DESCRIPTION ................................................................................................138

7.3 WATCHDOG TIMER REGISTERS .........................................................................................139

7.3.1 WATCHDOG Timer Register Map .............................................................................139

7.3.2 WATCHDOG Timeout Register (WDTO) ..................................................................139

7.3.3 WATCHDOG Mask Register (WDMSK) ....................................................................140

7.3.4 WATCHDOG Status Register (WDST) ......................................................................141

7.4 WATCHDOG TIMER REGISTER BITMAP .............................................................................141

8.0 ACCESS.bus Interface (ACB)

8.1 OVERVIEW .............................................................................................................................142

8.2 FUNCTIONAL DESCRIPTION ................................................................................................142

8.2.1 Data Transactions .....................................................................................................142

8.2.2 Start and Stop Conditions ..........................................................................................142

8.2.3 Acknowledge (ACK) Cycle ........................................................................................143

8.2.4 Acknowledge after Every Byte Rule ..........................................................................144

8.2.5 Addressing Transfer Formats ....................................................................................144

8.2.6 Arbitration on the Bus ................................................................................................144

8.2.7 Master Mode ..............................................................................................................145

8.2.8 Slave Mode ................................................................................................................147

8.2.9 Configuration .............................................................................................................147

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8.3 ACB REGISTERS ....................................................................................................................148

8.3.1 ACB Register Map .....................................................................................................148

8.3.2 ACB Serial Data Register (ACBSDA) ........................................................................148

8.3.3 ACB Status Register (ACBST) ..................................................................................149

8.3.4 ACB Control Status Register (ACBCST) ...................................................................150

8.3.5 ACB Control Register 1 (ACBCTL1) ..........................................................................151

8.3.6 ACB Own Address Register (ACBADDR) .................................................................152

8.3.7 ACB Control Register 2 (ACBCTL2) ..........................................................................152

8.4 ACB REGISTER BITMAP ........................................................................................................153

9.0 Game Port (GMP)

9.1 OVERVIEW .............................................................................................................................154

9.2 FUNCTIONAL DESCRIPTION ................................................................................................154

9.2.1 Game Device Axis Position Indication .......................................................................154

9.2.2 Capturing the Position ...............................................................................................155

9.2.3 Button Status Indication .............................................................................................156

9.2.4 Operation Modes .......................................................................................................156

9.2.5 Operation Control ......................................................................................................157

9.3 GAME PORT REGISTERS .....................................................................................................158

9.3.1 Game Port Register Map ...........................................................................................158

9.3.2 Game Port Control Register (GMPCTL) ....................................................................159

9.3.3 Game Port Legacy Status Register (GMPLST) .........................................................160

9.3.4 Game Port Extended Status Register (GMPXST) .....................................................161

9.3.5 Game Port Interrupt Enable Register (GMPIEN) .......................................................162

9.3.6 Game Device A X-Axis Position Low Byte (GMPAXL) ..............................................163

9.3.7 Game Device A X-Axis Position High Byte (GMPAXH) .............................................163

9.3.8 Game Device A YAxis Position Low Byte (GMPAYL) ...............................................163

9.3.9 Game Device A Y-Axis Position High Byte (GMPAYH) .............................................163

9.3.10 Game Device B X-Axis Position Low Byte (GMPBXL) ..............................................164

9.3.11 Game Device B X-Axis Position High Byte (GMPBXH) .............................................164

9.3.12 Game Device B Y-Axis Position Low Byte (GMPBYL) ..............................................164

9.3.13 Game Device B Y-Axis Position High Byte (GMPBYH) .............................................164

9.3.14 Game Port Event Polarity Register (GMPEPOL) ......................................................165

9.4 GAME PORT BITMAP .............................................................................................................166

10.0 Musical Instrument Digital Interface (MIDI) Port

10.1 OVERVIEW .............................................................................................................................167

10.2 FUNCTIONAL DESCRIPTION ................................................................................................167

10.2.1 Internal Bus Interface Unit .........................................................................................168

10.2.2 Port Control and Status Registers .............................................................................168

10.2.3 Data Buffers and FIFOs .............................................................................................168

10.2.4 MIDI Communication Engine .....................................................................................168

10.2.5 MIDI Signals Routing Control Logic ...........................................................................169

10.2.6 Operation Modes .......................................................................................................169

10.2.7 MIDI Port Status Flags ..............................................................................................170

(Continued)

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10.2.8 MIDI Port Interrupts ...................................................................................................171

10.2.9 Enhanced MIDI Port Features ...................................................................................172

10.3 MIDI PORT REGISTERS ........................................................................................................173

10.3.1 MIDI Port Register Map .............................................................................................173

10.3.2 MIDI Data In Register (MDI) ......................................................................................173

10.3.3 MIDI Data Out Register (MDO) .................................................................................173

10.3.4 MIDI Status Register (MSTAT) ..................................................................................174

10.3.5 MIDI Command Register (MCOM) ............................................................................174

10.3.6 MIDI Control Register (MCNTL) ................................................................................175

10.4 MIDI PORT BITMAP ................................................................................................................176

11.0 Voltage Level Monitor (VLM)

11.1 OVERVIEW .............................................................................................................................177

11.2 FUNCTIONAL DESCRIPTION ................................................................................................177

11.2.1 Voltage Measurement, Channels 0 through 10 .........................................................178

11.2.2 Thermistor-Based Temperature Measurement, Channels 11 to 13 ..........................179

11.2.3 VOS, V

HIGH

and V

LOW

Limits, OTS and ALERT Output, IRQ and SMI .....................179

11.2.4 Power-On Reset Default States ................................................................................180

11.2.5 Standby Mode ...........................................................................................................180

11.3 ANALOG SUPPLY CONNECTION .........................................................................................180

11.3.1 Recommendations .....................................................................................................180

11.3.2 Reference Voltage .....................................................................................................181

11.4 REGISTER BANK OVERVIEW ...............................................................................................181

11.5 VLM REGISTERS ....................................................................................................................182

11.5.1 VLM Register Map .....................................................................................................182

11.5.2 Voltage Event Status Register 0 (VEVSTS0) ............................................................183

11.5.3 Voltage Event Status Register 1 (VEVSTS1) ............................................................183

11.5.4 Voltage Event to SMI Register 0 (VEVSMI0) ............................................................184

11.5.5 Voltage Event to SMI Register 1 (VEVSMI1) ............................................................185

11.5.6 Voltage Event to IRQ Register 0 (VEVIRQ0) ............................................................186

11.5.7 Voltage Event to IRQ Register 1 (VEVIRQ1) ............................................................186

11.5.8 Voltage ID Register (VID) ..........................................................................................187

11.5.9 Voltage Conversion Rate Register (VCNVR) ............................................................188

11.5.10 VLM Configuration Register (VLMCFG) ....................................................................189

11.5.11 VLM Bank Select Register (VLMBS) .........................................................................189

11.5.12 Voltage Channel Configuration and Status Register (VCHCFST) .............................190

11.5.13 Read Channel Voltage Register (RDCHV) ................................................................191

11.5.14 Channel Voltage High Limit Register (CHVH) ...........................................................191

11.5.15 Channel Voltage Low Limit Register (CHVL) ............................................................191

11.5.16 Overtemperature Shutdown Limit Register (OTSL) ...................................................191

11.6 VLM REGISTER BITMAP ........................................................................................................192

11.6.1 VLM Control and Status Registers ............................................................................192

11.6.2 VLM Channel Registers .............................................................................................192

11.7 USAGE HINTS ........................................................................................................................193

(Continued)

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11.7.1 Calculating the Channel Delay ..................................................................................193

11.7.2 Measuring Out of Range Positive and Negative Voltages .........................................194

12.0 Temperature Sensor (TMS)

12.1 OVERVIEW .............................................................................................................................195

12.2 FUNCTIONAL DESCRIPTION ................................................................................................195

12.2.1 Register Bank Overview ............................................................................................196

12.2.2 TOS, T

HIGH

and T

LOW

Limits, OTS and ALERT Output, IRQ and SMI ......................196

12.2.3 ALERT Response Read Sequence ...........................................................................197

12.2.4 Power-On Reset Default States ................................................................................197

12.2.5 Temperature Data Format .........................................................................................198

12.2.6 Standby Mode ...........................................................................................................198

12.2.7 Diode Fault Detection ................................................................................................198

12.3 TMS REGISTERS ...................................................................................................................199

12.3.1 TMS Register Map .....................................................................................................199

12.3.2 Temperature Event Status Register (TEVSTS) .........................................................200

12.3.3 Temperature Event to SMI Register (TEVSMI) .........................................................201

12.3.4 Temperature Event to IRQ Register (TEVIRQ) .........................................................202

12.3.5 TMS Configuration Register (TMSCFG) ....................................................................203

12.3.6 TMS Bank Select Register (TMSBS) .........................................................................203

12.3.7 Temperature Channel Configuration and Status Register (TCHCFST) ....................204

12.3.8 Read Channel Temperature Register (RDCHT) ........................................................205

12.3.9 Channel Temperature High Limit Register (CHTH) ...................................................205

12.3.10 Channel Temperature Low Limit Register (CHTL) ....................................................205

12.3.11 Channel Overtemperature Limit Register (CHOTL) ..................................................205

12.4 TMS REGISTER BITMAP .......................................................................................................206

12.4.1 TMS Control and Status Registers ............................................................................206

12.4.2 TMS Channel Registers ............................................................................................206

12.5 USAGE HINTS ........................................................................................................................206

12.5.1 Remote Diode Selection ............................................................................................206

12.5.2 ADC Noise Filtering ...................................................................................................207

12.5.3 PC Board Layout .......................................................................................................207

12.5.4 Twisted Pair and Shielded Cables .............................................................................209

13.0 Legacy Functional Blocks

13.1 KEYBOARD AND MOUSE CONTROLLER (KBC) ..................................................................210

13.1.1 General Description ...................................................................................................210

13.1.2 KBC Register Map .....................................................................................................210

13.1.3 KBC Bitmap Summary ...............................................................................................210

13.2 FLOPPY DISK CONTROLLER (FDC) .....................................................................................211

13.2.1 General Description ...................................................................................................211

13.2.2 FDC Register Map .....................................................................................................211

13.2.3 FDC Bitmap Summary ...............................................................................................212

13.3 PARALLEL PORT ....................................................................................................................213

13.3.1 General Description ...................................................................................................213

(Continued)

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13.3.2 Parallel Port Register Map .........................................................................................213

13.3.3 Parallel Port Bitmap Summary ..................................................................................214

13.4 UART FUNCTIONALITY (SP1 AND SP2) ...............................................................................216

13.4.1 General Description ...................................................................................................216

13.4.2 UART Mode Register Bank Overview .......................................................................216

13.4.3 SP1 and SP2 Register Maps for UART Functionality ................................................217

13.4.4 SP1 and SP2 Bitmap Summary for UART Functionality ...........................................219

13.5 IR FUNCTIONALITY (SP2) .....................................................................................................221

13.5.1 General Description ...................................................................................................221

13.5.2 IR Mode Register Bank Overview .............................................................................221

13.5.3 SP2 Register Map for IR Functionality ......................................................................222

13.5.4 SP2 Bitmap Summary for IR Functionality ................................................................223

14.0 Device Characteristics

14.1 GENERAL DC ELECTRICAL CHARACTERISTICS ...............................................................225

14.1.1 Recommended Operating Conditions .......................................................................225

14.1.2 Absolute Maximum Ratings .......................................................................................225

14.1.3 Capacitance ..............................................................................................................225

14.1.4 Power Consumption under Recommended Operating Conditions ............................226

14.2 DC CHARACTERISTICS OF PINS, BY I/O BUFFER TYPES ................................................226

14.2.1 Input, CMOS Compatible ...........................................................................................226

14.2.2 Input, PCI 3.3V ..........................................................................................................226

14.2.3 Input, SMBus Compatible ..........................................................................................227

14.2.4 Input, Strap Pin ..........................................................................................................227

14.2.5 Input, TTL Compatible ...............................................................................................227

14.2.6 Input, TTL Compatible with Schmitt Trigger ..............................................................227

14.2.7 Output, PCI 3.3V .......................................................................................................228

14.2.8 Output, Totem-Pole Buffer .........................................................................................228

14.2.9 Output, Open-Drain Buffer .........................................................................................228

14.2.10 Input, Analog .............................................................................................................228

14.2.11 Input, Analog .............................................................................................................228

14.2.12 Input, Analog .............................................................................................................229

14.2.13 Output, Analog ...........................................................................................................229

14.2.14 Output, Analog ...........................................................................................................229

14.2.15 Exceptions .................................................................................................................229

14.3 INTERNAL RESISTORS .........................................................................................................230

14.3.1 Pull-Up Resistor .........................................................................................................230

14.3.2 Pull-Down Resistor ....................................................................................................230

14.4 ANALOG CHARACTERISTICS ...............................................................................................230

14.4.1 VLM ...........................................................................................................................230

14.4.2 TMS ...........................................................................................................................230

14.5 AC ELECTRICAL CHARACTERISTICS ..................................................................................232

14.5.1 AC Test Conditions ....................................................................................................232

14.5.2 Clock Timing ..............................................................................................................232

14.5.3 LCLK and LRESET ....................................................................................................233

(Continued)

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14.5.4 LPC and SERIRQ Signals .........................................................................................234

14.5.5 Serial Port, Sharp-IR, SIR and Consumer Remote Control Timing ...........................235

14.5.6 Modem Control Timing ..............................................................................................236

14.5.7 FDC Write Data Timing .............................................................................................236

14.5.8 FDC Drive Control Timing .........................................................................................237

14.5.9 FDC Read Data Timing .............................................................................................237

14.5.10 Standard Parallel Port Timing ....................................................................................238

14.5.11 Enhanced Parallel Port Timing ..................................................................................238

14.5.12 Extended Capabilities Port (ECP) Timing ..................................................................239

(Continued)

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1.0 Signal/Pin Connection and Description

1.1 CONNECTION DIAGRAM

Plastic Quad Flatpack (PQFP), JEDEC

xxx = Three character identiﬁer for National data, and keyboard ROM and/or customer identiﬁcation code

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

59585756555453525150494847464544424140

PC87366-xxx/VLA

PD7

VSS

VBAT

MTR0

SLCT

DIR

STEP

WDATA

DRATE0

TRK0

WGATE

RDATA

DENSEL

INDEX

GPIO17/

DR1/IRSL3

636261

65 66 67

68 69 70

71 72

73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100

101 102

103

104

105

106

107

108

VDD

VSB

PWUREQ

GPIO16/MTR1/IRSL2

DR0

GPIO34/FANOUT2

GPIO01/FANOUT1

BUSY_WAIT

HDSEL

DSKCHG

ACK

ERR

AFD_DSTRB

PD1

STB_WRITE

INIT

PD6 PD5

PD4 PD3

SLIN_ASTRB

PD2

VSS

PD0

GPIO00/FANIN1

GPIO33/FANIN2

VDD

VSS

VDD

VSS

VDD

CHASI

GPIOE1/

OTS1

GPIOE2/OTS2/LED1

LAD1

LAD3

LAD2

LRESET

LCLK

LFRAME

LAD0

LDRQ SERIRQ

GPIO32/P16/IRSL1

DTR1_BOUT1/BADDR

RI1

DCD1

SOUT1/PSLDC0

DSR1

SIN1

RTS1/TEST

CTS1

DTR2_BOUT2/PSONPOL

RI2

DCD2

SOUT2/PSLDC1

DSR2

SIN2

RTS2

CTS2

GPIO13/SDA

GPIO14/

WDO

KBDAT

KBCLK

MCLK

MDAT

KBRST/GPIO06

GA20/GPIO07

Order Number PC87366-xxx/VLA

See NS Package Number VLA128A

GPIOE3/LED2

GPIOE5/

CHASO

GPIO03/FANOUT0

GPIO02/FANIN0

GPIE6/IRRX2_IRSL0

GPIE7/IRRX1

GPO15/IRTX

GPIO10/SMI

GPIOE4/

RING/ALARM

GPIO05/P17 GPIO04/P12

GPIO11

GPIO12/SCL

CLKIN

GPIOE0

GPIO27/JOYBBTN1

GPIO25/JOYBY

GPIO26/JOYBBTN0

GPIO24/JOYBX

GPIO23/JOYABTN1

GPIO21/JOYAY

GPIO22/JOYABTN0

GPIO20/JOYAX

GPIO30/MDTX

GPIO31/MDRX

AVI5

AVI4

AVDD

VREF

AVI6

D2P

D2N/TS3

D1P/TS2

D1N/TS1

AVSS

AVI3

AVI2

SLPS5/AVI0

PSON

/GPOS1

PWBTOUT/GPOS0

PWBTIN/GPIS2

SLPS3

AVI1

1.0 Signal/Pin Connection and Description (Continued)

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1.2 BUFFER TYPES AND SIGNAL/PIN DIRECTORY

Table 2 is an alphabetical list of all signals, cross-referenced to additional information for detailed functional descriptions, electrical DC characteristics, and pin multiplexing. The signal DC characteristics are denoted by a buffer type symbol, described briefly below and in further detail in Section 14.2. The pin multiplexing information refers to two different types of multiplexing:

●

MUX - Multiplexed, denoted by a slash (/) between pins in the diagram in Section 1.1. Pins are shared between two different functions. Each function is associated with different board connectivity, and normally, the function selection is determined by the board design and cannot be changed dynamically. The multiplexing options must be conﬁgured by the BIOS upon power-up, in order to comply with the board implementation.

●

MM - Multiple Mode, denoted by an underscore (_) between pins in the diagram in Section 1.1. Pins have two or more modes of operation within the same function. These modes are associated with the same external (board) connectivity. Mode selection may be controlled by the device driver, through the registers of the functional block, and do not require a special BIOS setup upon power-up. These pins are not considered multiplexed pins from the SuperI/O conﬁguration perspective. The mode selection method (registers and bits) as well as the signal speciﬁcation in each mode, are described within the functional description of the relevant functional block.

Table 2. SIgnal/Pin Directory

Table 1. Buffer Types

Symbol Description

AN#

Input, analog type number

Input, CMOS compatible

PCI

Input, PCI 3.3V

Input, SMBus compatible

STRP

Input, Strap pin with weak pull-down during strap time

Input, TTL compatible

Input, TTL compatible with Schmidt Trigger

ULR

Input, with serial UL Resistor

AN#

Output, analog type number

PCI

Output, PCI 3.3V

p/n

Output, push-pull buffer that is capable of sourcingpmA and sinkingn mA

Output, open-drain output buffer that is capable of sinkingn mA PWR Power pin GND Ground pin

Signal Pin(s)

Functional Group DC Characteristics

MUX

Name Section Buffer Type Section

ACK 79 Parallel Port 1.4.11

14.2.5

AFD_DSTRB 93 Parallel Port 1.4.11

14,O14/14

14.2.9, 14.2.8 MM

ALARM 27 Hardware Monitoring 1.4.16

14.2.9 MUX ASTRB See SLIN_ASTRB AVI0 37 Hardware Monitoring 1.4.16

AN1

14.2.10 MUX AVI1-6 38-43 Hardware Monitoring 1.4.16

AN1

14.2.10 AV

44 Power and Ground 1.4.12 PWR N/A

1.0 Signal/Pin Connection and Description (Continued)

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45 Power and Ground 1.4.12 AGND N/A

BADDR 101 Strap Conﬁguration 1.4.15

STRP

14.2.4 MUX BOUT1 See

DTR1_BOUT1

BOUT2 See

DTR2_BOUT2

BUSY_WAIT 78 Parallel Port 1.4.11

14.2.5 MM CHASI 29 Protection 1.4.13

14.2.1 CHASO 28 Protection 1.4.13

14.2.9 MUX CLKIN 22 Clock 1.4.3

14.2.5 CTS1 100 Serial Port 1 1.4.14

14.2.6 CTS2 108 Serial Port 2 1.4.14

14.2.6 DCD1 95 Serial Port 1 1.4.14

14.2.6 DCD2 103 Serial Port 2 1.4.14

14.2.6 DENSEL 75 FDC 1.4.5

2/12

14.2.8 DIR 68 FDC 1.4.5

12,O2/12

14.2.9, 14.2.8 D1N

D2N

47 49

Hardware Monitoring 1.4.16

AN3

14.2.12 D1P

D2P

48 50

Hardware Monitoring 1.4.16

AN2

14.2.11

DR0 70 FDC 1.4.5

12,O2/12

14.2.9, 14.2.8 DR1 71 FDC 1.4.5

12,O2/12

14.2.9, 14.2.8 MUX DRATE0 74 FDC 1.4.5

3/6

14.2.8 DSKCHG 60 FDC 1.4.5

14.2.5 DSR1 96 Serial Port 1 1.4.14

14.2.6 DSR2 104 Serial Port 2 1.4.14

14.2.6 DSTRB See AFD_DSTRB DTR1_BOUT1 101 Serial Port 1 1.4.14

3/6

14.2.8 MUX, MM DTR2_BOUT2 109 Serial Port 2 1.4.14

3/6

14.2.8 MUX, MM ERR 91 Parallel Port 1.4.11

14.2.5 FANIN0 4 Fan Speed 1.4.4

14.2.6 MUX FANIN1 2 Fan Speed 1.4.4

14.2.6 MUX FANIN2 128 Fan Speed 1.4.4

14.2.6 MUX FANOUT0 5 Fan Speed 1.4.4

2/14

14.2.8 MUX FANOUT1 3 Fan Speed 1.4.4

2/14

14.2.8 MUX FANOUT2 1 Fan Speed 1.4.4

2/14

14.2.8 MUX GA20 (P21) 9 KBC 1.4.9

,OD

14.2.5, 14.2.9 MUX

Signal Pin(s)

Functional Group DC Characteristics

MUX

Name Section Buffer Type Section

1.0 Signal/Pin Connection and Description (Continued)

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GPIE6-7 58-59 System Wake-Up 1.4.17

14.2.6 MUX GPIO00-07 2-9 GPIO Port 1.4.7

INTS,OD6,O

3/6

14.2.6, 14.2.9, 14.2.8 MUX GPIO10

GPIO11-14 GPO15 GPIO16-17

21 53-56 57 69, 71

GPIO Port 1.4.7

,OD6,O

3/6

14.2.6, 14.2.9, 14.2.8 MUX

GPIO20-27 117-124 GPIO Port 1.4.7

,OD6,O

3/6

14.2.6, 14.2.9, 14.2.8 MUX GPIO30-33

GPIO34

125-128 1

GPIO Port 1.4.7

,OD6,O

3/6

14.2.6, 14.2.9, 14.2.8 MUX

GPIOE0-1 23-24 System Wake-Up 1.4.17

,OD6,O

3/6

14.2.6, 14.2.9, 14.2.8 GPIOE2-5 25-28 System Wake-Up 1.4.17

INTS,OD6,O

3/6

14.2.6, 14.2.9, 14.2.8 MUX GPIS2 35 System Wake-Up 1.4.17

14.2.6 MUX GPOS0-1 33-34 System Wake-Up 1.4.17

OD6,O

3/6

14.2.9, 14.2.8 MUX HDSEL 61 FDC 1.4.5

12,O2/12

14.2.9, 14.2.8 INDEX 73 FDC 1.4.5

14.2.5 INIT 89 Parallel Port 1.4.11

14,O14/14

14.2.9, 14.2.8 IRRX1 59 Infrared 1.4.8

14.2.6

MUX

IRRX2_IRSL0 58 Infrared 1.4.8

INTS,O

3/6

14.2.6, 14.2.8

MUX, MM

IRSL1 127 Infrared 1.4.8

INT,O

3/6

14.2.5, 14.2.8 MUX IRSL2 69 Infrared 1.4.8

T,O3/6

14.2.5, 14.2.8

MUX

IRSL3 71 Infrared 1.4.8

14.2.5

MUX

IRTX 57 Infrared 1.4.8

6/12

14.2.8

MUX

JOYABTN0 119 Game Port 1.4.6

14.2.6

MUX

JOYABTN1 120 Game Port 1.4.6

14.2.6

MUX

JOYAX 117 Game Port 1.4.6

TS,OD12

14.2.6, 14.2.9

MUX

JOYAY 118 Game Port 1.4.6

TS,OD12

14.2.6, 14.2.9

MUX

JOYBBTN0 123 Game Port 1.4.6

14.2.6

MUX

JOYBBTN1 124 Game Port 1.4.6

14.2.6

MUX

JOYBX 121 Game Port 1.4.6

TS,OD12

14.2.6, 14.2.9

MUX

JOYBY 122 Game Port 1.4.6

TS,OD12

14.2.6, 14.2.9

MUX

KBCLK 111 KBC 1.4.9

,OD

14.2.6, 14.2.9 KBDAT 112 KBC 1.4.9

,OD

14.2.6, 14.2.9 KBRST (P20) 8 KBC 1.4.9

,OD

14.2.6, 14.2.9

MUX

LAD0-3 15-18 Bus Interface 1.4.2

PCI,OPCI

14.2.2, 14.2.7 LED1, LED2 25, 26 System Wake-Up 1.4.17

12/12

14.2.8

MUX

LCLK 11 Bus Interface 1.4.2

PCI

14.2.2

Signal Pin(s)

Functional Group DC Characteristics

MUX

Name Section Buffer Type Section

1.0 Signal/Pin Connection and Description (Continued)

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LDRQ 13 Bus Interface 1.4.2

PCI

14.2.7 LFRAME 14 Bus Interface 1.4.2

PCI

14.2.2 LRESET 10 Bus Interface 1.4.2

PCI

14.2.2 MCLK 13 KBC 1.4.9

,OD

14.2.6, 14.2.9 MDAT 114 KBC 1.4.9

INTS,OD

14.2.6, 14.2.9 MDRX 126 MIDI Port 1.4.10

14.2.6

MUX

MDTX 125 MIDI Port 1.4.10

3/6

14.2.8

MUX

MTR0 72 FDC 1.4.5

12,O2/12

14.2.9, 14.2.8 MTR1 69 FDC 1.4.5

12,O2/12

14.2.9, 14.2.8

MUX

OTS1 OTS2

24 25

Hardware Monitoring 1.4.16

14.2.9 MUX

P12, P16, P17 6,127, 7 KBC 1.4.9

,OD

14.2.5, 14.2.9

MUX

PD7-5 PD4-3, PD2, PD1 PD0

80-82 85-86 88, 90 92

Parallel Port 1.4.11

,OD14,O

14/14

14.2.5, 14.2.9, 14.2.8

PE 77 Parallel Port 1.4.11

14.2.5 PIRQ3-7

PIRQ9-12 PIRQ14-15

117-121 122-125 126-127

Bus Interface 1.4.2

14.2.6 MUX

PSLDC0 99 Strap Conﬁguration 1.4.15

STRP

14.2.4 MUX PSLDC1 107 Strap Conﬁguration 1.4.15

STRP

14.2.4 MUX PSON 34 System Wake-Up 1.4.17

12,O4/4

14.2.9, 14.2.8

MUX

PSONPOL 109 Strap Conﬁguration 1.4.15

STRP

14.2.4 MUX PWBTIN 35 System Wake-Up 1.4.17

14.2.6

MUX

PWBTOUT 33 System Wake-Up 1.4.17

14.2.9

MUX

PWUREQ 32 System Wake-Up 1.4.17

14.2.9 RDATA 62 FDC 1.4.5

14.2.5 RI1 102 Serial Port 1 1.4.14

14.2.6 RI2 110 Serial Port 2 1.4.14

14.2.6 RING 27 System Wake-Up 1.4.17

14.2.6

MUX

RTS1 98 Serial Port 1 1.4.14

3/6

14.2.8

MUX

RTS2 106 Serial Port 2 1.4.14

3/6

14.2.8 SCL 54 ACB 1.4.1

,OD6,O

3/6

14.2.5, 14.2.9, 14.2.8

MUX

SDA 55 ACB 1.4.1

,OD6,O

3/6

14.2.5, 14.2.9, 14.2.8

MUX

SERIRQ 12 Bus Interface 1.4.2

PCI,OPCI

14.2.2, 14.2.7 SIN1 97 Serial Port 1 1.4.14

14.2.6

Signal Pin(s)

Functional Group DC Characteristics

MUX

Name Section Buffer Type Section

1.0 Signal/Pin Connection and Description (Continued)

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SIN2 105 Serial Port 2 1.4.14

14.2.6 SLCT 76 Parallel Port 1.4.11

14.2.5 SLIN_ASTRB 87 Parallel Port 1.4.11

14,O14/14

14.2.9, 14.2.8

SLPS3,5 36,37 System Wake-Up 1.4.17

14.2.6

MUX

(

SLPS3)

SMI 21 Bus Interface 1.4.2

14.2.9

MUX

SOUT1 99 Serial Port 1 1.4.14

3/6

14.2.8

MUX

SOUT2 107 Serial Port 2 1.4.14

3/6

14.2.8

MUX

STEP 67 FDC 1.4.5

12,O2/12

14.2.9, 14.2.8 STB_WRITE 94 Parallel Port 1.4.11

14,O14/14

14.2.9, 14.2.8

TEST 98 Strap Conﬁguration 1.4.15

STRP

14.2.4

MUX

TRK0 64 FDC 1.4.5

14.2.5 TS1-3 47-49 VLM 1.4.16

AN1

14.2.10

MUX

BAT

30 Power and Ground 1.4.12

ULR

N/A

20, 52, 83, 115 Power and Ground 1.4.12 PWR N/A

REF

46 Hardware Monitoring 1.4.16

AN2,OAN1

14.2.11, 14.2.13 V

31 Power and Ground 1.4.12 PWR N/A

19, 51, 84, 116 Power and Ground 1.4.12 GND N/A WAIT See BUSY_WAIT WDATA 66 FDC 1.4.5

12,O2/12

14.2.9, 14.2.8

WDO 56 WATCHDOG 1.4.18

6,O3/6

14.2.9, 14.2.8

MUX

WGATE 65 FDC 1.4.5

12,O2/12

14.2.9, 14.2.8

WP 63 FDC 1.4.5

14.2.5

WRITE See STB_WRITE

Signal Pin(s)

Functional Group DC Characteristics

MUX

Name Section Buffer Type Section

1.0 Signal/Pin Connection and Description (Continued)

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1.3 PIN MULTIPLEXING

The multiplexing options and the associated setup configuration for all pins are described in Table 3. A multiplexing option can be chosen on one pin only per group.

Table 3. Pin Multiplexing Conﬁguration

Pin(s)

Default Alternate

Signal I/O Conﬁguration Signal I/O Conﬁguration

1 GPIO34 I/O SIOCF2, Bits 1-0 = 00 FANOUT2 O SIOCF2, Bits 1-0 = 01

CHLOCK O SIOCF2, Bits 1-0 = 10 2 GPIO00 I/O SIOCF2, Bit 2 = 0 FANIN1 I SIOCF2, Bit 2 = 1 3 GPIO01 I/O SIOCF2, Bit 3 = 0 FANOUT1 O SIOCF2, Bit 3 = 1 4 GPIO02 I/O SIOCF2, Bit 4 = 0 FANIN0 I SIOCF2, Bit 4 = 1 5 GPIO03 I/O SIOCF2, Bit 5 = 0 FANOUT0 O SIOCF2, Bit 5 = 1 6 GPIO04 I/O SIOCF2, Bit 6 = 0 P12 I/O SIOCF2, Bit 6 = 1 7 GPIO05 I/O SIOCF2, Bit 7 = 0 P17 I/O SIOCF2, Bit 7 = 1 8 KBRST (P20) SIOCF3, Bit 0 = 1 GPIO06 I/O SIOCF3, Bit 0 = 0 9 GA20 (P21) SIOCF3, Bit 1 = 1 GPIO07 I/O SIOCF3, Bit 1 = 0 21 GPIO10 I/O SIOCF3, Bit 2 = 0

SMI O SIOCF3, Bit 2 = 1 24 GPIOE1 I/O SIOCFA, Bit 0 = 0

OTS1 O SIOCFA, Bit 0 = 1 25 GPIOE2 I/O

SIOCFA, Bits 2-1 = 00

Note 1.

LED1 O SIOCFA, Bits 2-1 = 01

OTS2 O SIOCFA, Bits 2-1 = 10 26 GPIOE3 I/O

SIOCFA, Bit 3 = 0

Note 1.

LED2 O SIOCFA, Bit 3 =1 27 GPIOE4 I/O SIOCFA, Bits 5-4 = 00

RING I SIOCFA, Bits 5-4 = 01

ALARM O SIOCFA, Bits 5-4 = 10 28 GPIOE5 I/O SIOCFA, Bit 6 = 0

CHASO O SIOCFA, Bit 6 =1 33-35,

PWBTOUT PSON PWBTIN SLPS5

O O

I I

SIOCFA, Bit 7 = 0

Note 1.

GPOS0

GPOS1

GPIS2

AVI0

0 0

I I

SIOCFA, Bit 7 = 1

Note 1.

47 D1N I SIOCFB, Bit 6 = 0 TS1 I SIOCFB, Bit 6 = 1 48 D1P O SIOCFB, Bit 6 = 0 TS2 I SIOCFB, Bit 6 = 1 49 D2N I SIOCFB, Bit 6 = 0 TS3 I SIOCFB, Bit 6 = 1 54 GPIO12 I/O SIOCF3, Bit 5 = 0 SCL I/O SIOCF3, Bit 5 = 1 55 GPIO13 I/O SIOCF3, Bit 5 = 0 SDA I/O SIOCF3, Bit 5 = 1 56 GPIO14 I/O SIOCF3, Bit 6 = 0

WDO O SIOCF3, Bit 6 = 1 57 GPO15 O SIOCF3, Bit 7 = 0 IRTX O SIOCF3, Bit 7 = 1 58 GPIE6 I SIOCFB, Bit 0 = 0 IRRX2_IRSL0 I/O SIOCFB, Bit 0 = 1 59 GPIE7 I SIOCFB, Bit 1 = 0 IRRX1 I SIOCFB, Bit 1 = 1 69 GPIO16 I/O SIOCF4, Bits 1-0 = 00

MTR1 O SIOCF4, Bits 1-0 = 01

IRSL2 I/O SIOCF4, Bits 1-0 = 10 71 GPIO17 I/O SIOCF4, Bits 3-2 = 00

DR1 O SIOCF4, Bits 3-2 = 01

IRSL3 I SIOCF4, Bits 3-2 = 10 117 GPIO20 I/O SIOCF4, Bit 4 = 0 JOYAX I/O SIOCF4, Bit 4 = 1 118 GPIO21 I/O SIOCF4, Bit 4 = 0 JOYAY I/O SIOCF4, Bit 4 = 1

1.0 Signal/Pin Connection and Description (Continued)

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119 GPIO22 I/O SIOCF4, Bit 4 = 0 JOYABTN0 I SIOCF4, Bit 4 = 1 120 GPIO23 I/O SIOCF4, Bit 4 = 0 JOYABTN1 I SIOCF4, Bit 4 = 1 121 GPIO24 I/O SIOCF4, Bit 4 = 0 JOYBX I/O SIOCF4, Bit 4 = 1 122 GPIO25 I/O SIOCF4, Bit 4 = 0 JOYBY I/O SIOCF4, Bit 4 = 1 123 GPIO26 I/O SIOCF4, Bit 4 = 0 JOYBBTN0 I SIOCF4, Bit 4 = 1 124 GPIO27 I/O SIOCF4, Bit 4 = 0 JOYBBTN1 I SIOCF4, Bit 4 = 1 125 GPIO30 I/O SIOCF4, Bit 5 = 0 MDTX O SIOCF4, Bit 5 = 1 126 GPIO31 I/O SIOCF4, Bit 5 = 0 MDRX I SIOCF4, Bit 5 = 1

127 GPIO32

I/O

SIOCF4, Bits 7,6 = 00

P16 I/O SIOCF4, Bits 7,6 = 01

IRSL1 I/O SIOCF4, Bits 7,6 = 10 128 GPIO33 I/O SIOCF5, Bits 1-0 = 00 FANIN2 I SIOCF5, Bits 1-0 = 10

Note 1. The signal selected on each pin is determined during V

power-up by the PSLDC0,1 straps.

Pin(s)

Default Alternate

Signal I/O Conﬁguration Signal I/O Conﬁguration

1.0 Signal/Pin Connection and Description (Continued)

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1.4 DETAILED SIGNAL/PIN DESCRIPTIONS

This section describes all signals, organized in functional groups.

1.4.1 ACCESS.bus Interface (ACB)

1.4.2 Bus Interface

1.4.3 Clock

1.4.4 Fan Speed Control and Monitor (FSCM)

Signal Pin(s) I/O Buffer Type Power Well Description

SCL 54 I/O

/OD

ACCESS.bus Clock Signal. An internal pull-up is optional, depending upon the ACCESS.bus conﬁguration register.

SDA 55 I/O

/OD

ACCESS.bus Data Signal. An internal pull-up is optional, depending upon the ACCESS.bus conﬁguration register.

Signal Pin(s) I/O Buffer Type Power Well Description

LAD0-3 15-18 I/O

PCI/OPCI

LPC Address-Data. Multiplexed command, address bidirectional data and cycle status.

LCLK 11 I

PCI

LPC Clock. Practically the PCI clock (up to 33 MHz)

LDRQ 13 O

PCI

LPC DMA Request. Encoded DMA request for LPC I/F.

LFRAME 14 I

PCI

LPC Frame. Low pulse indicates the beginning of new LPC cycle or termination of a broken cycle.

LRESET 10 I

PCI

LPC Reset. Practically the PCI system reset.

SERIRQ 12 I/O

PCI/OPCI

Serial IRQ. The interrupt requests are serialized over a single pin, where each internal IRQ signal is delivered during a designated time slot.

SMI 21 OD

System Management Interrupt

Signal Pin(s) I/O Buffer Type Power Well Description

CLKIN 22 I

Clock In. 48 MHz clock input.

Signal Pin(s) I/O Buffer Type Power Well Description

FANIN0 FANIN1 FANIN2

4 2 128

Fan Inputs. Used to feed the fan’s tachometer pulse to the Fan Speed Monitor. The rising edge indicates the completion of a half (or full) revolution of the fan.

FANOUT0 FANOUT1 FANOUT2

5 3 1

2/14

Fan Outputs. Pulse Width Modulation (PWM) signals, used to control the speed of cooling fans by controlling the voltage supplied to the fan’s motor.

1.0 Signal/Pin Connection and Description (Continued)

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1.4.5 Floppy Disk Controller (FDC)

Signal Pin(s) I/O Buffer Type Power Well Description

DENSEL 75 O

2/12

Density Select. Indicates that a high FDC density data rate (500 Kbps or 1 Mbps) or a low density data rate (250 or 300 Kbps) is selected.

DENSEL polarity is controlled by bit 5 of the FDC Configuration Register.

DIR 68 O

12,O2/12

Direction. Determines the direction of the Floppy Disk Drive (FDD) head movement (active = step in, inactive = step out) during a seek operation. During reads or writes,

DIR is inactive.

DR0 70 O

12,O2/12

Drive Select 0. Decoded drive select output signal. DR0 is controlled by bit 0 of the Digital Output Register (DOR).

DR1 71 O

12,O2/12

Drive Select 1. Decoded drive select output signal. DR0 is controlled by bit 1 of the Digital Output Register (DOR).

DRATE0 74 O

3/6

Data Rate 0. Reflects the value of bit 0 of the Configuration Control Register (CCR) or the Data Rate Select Register (DSR), whichever was written to last. Output from the pin is push-pull buffered.

DSKCHG 60 I

Disk Change. Indicates if the drive door has been opened. The state of this pin is stored in the Digital Input Register (DIR). This pin can also be configured as the RGATEdata separator diagnostic input signal via the MODE command.

HDSEL 61 O

12,O2/12

Head Select. Determines which side of the FDD is accessed. Active low selects side 1, inactive selects side 0.

INDEX 73 I

Index. Indicates the beginning of an FDD track.

MTR0 72 O

12,O2/12

Motor Select 0. Active low, motor enable line for drives 0, controlled by bits D7-4 of the Digital Output Register (DOR).

MTR1 69 O

12,O2/12

Motor Select 1. Active low, motor enable lines for drives 1, controlled by bits D7-4 of the Digital Output Register (DOR).

RDATA62 I

Read Data. Raw serial input data stream read from the FDD.

STEP 67 O

12,O2/12

Step. Issues pulses to the disk drive at a software programmable rate to move the head during a seek operation.

TRK0 64 I

Track 0. Indicates to the controller that the head of the selected floppy disk drive is at track 0.

WDATA66 O

12,O2/12

Write Data. Carries out the pre-compensated serial data that is written to the floppy disk drive. Pre-compensation is software selectable.

WGATE 65 O

12,O2/12

Write Gate. Enables the write circuitry of the selected disk drive. WGATE is designed to prevent glitches during power up and power down. This prevents writing to the disk when power is cycled.

WP 63 I

Write Protected. Indicates that the disk in the selected drive is write protected. A software programmable conﬁguration bit (FDC conﬁguration at Index F0h, Logical Device 0) can force an active write-protect indication to the FDC, regardless of the status of this pin.

1.0 Signal/Pin Connection and Description (Continued)

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1.4.6 Game Port

1.4.7 General-Purpose Input/Output (GPIO) Ports

1.4.8 Infrared (IR)

Signal Pin(s) I/O Buffer Type Power Well Description

JOYAX 117 I/O

/OD

Joystick A X-Axis. Indicates X-axis position of joystick A.

JOYAY 118 I/O

INTS/OD

Joystick A Y-Axis. Indicates Y-axis position of joystick A.

JOYABTN0 119 I

Joystick A Button 0. Indicates button 0 status of joystick A.

JOYABTN1 120 I

Joystick A Button 1. Indicates button 1 status of joystick A.

JOYBX 121 I/O

INTS/OD

Joystick B X-Axis. Indicates X-axis position of joystick B.

JOYBY 122 I/O

/OD

Joystick BY-Axis. Indicates Y-axis position of joystick B.

JOYBBTN0 123 I

Joystick B Button 0. Indicates button 0 status of joystick B.

JOYBBTN1 124 I

Joystick B Button 1. Indicates button 1 status of joystick B.

Signal Pin/s I/O Buffer Type Power Well Description

GPIO00-07 2-9 I/O

6,O3/6

General-Purpose I/O Port 0, bits 0-7. Each pin is configured independently as input or I/O, with or without static pull-up, and with either open-drain or push-pull output type. The port support interrupt assertion and each pin can be enabled or masked as an interrupt source.

GPIO10 GPIO11-14 GPO15 GPIO16-17

21 53-56 57 69, 71

I/O

6,O3/6

General-Purpose I/O Port 1, bits 0-7. Same as Port 0. Bit 5 is output only with low output as default.

GPIO20-27 117-124 I/O

6,O3/6

General-Purpose I/O Port 2, bits 0-7. Similar to port 0, but without the interrupt assertion capability.

GPIO30-33 GPIO34

125-128 1 I/O

6,O3/6

General-Purpose I/O Port 3, bits 0-4. Similar to port 0, but without the interrupt assertion capability. Bits 5, 6 and 7 are not implemented.

Signal Pin/s I/O Buffer Type Power Well Description

IRRX1 59 I

VDD,V

IR Receive 1. Primary input to receive serial data from the IR transceiver. Monitored during power-off for wake-up event detection.

IRRX2_IRSL0 58 I/O

TS/O3/6

VDD,VSBIRRX2 - IR Receive 2. Auxiliary IR receiver input to support a

second transceiver. Monitored during power-off for wake-up event detection.

IRSL3-0 IR Select. Output are used to control the IR transceivers. Input for PnP identiﬁcation of plug-in IR transceiver (dongle).

After reset, the dual-function IRSLX pins wake up in input mode. After the ID is read by the IR driver, they may be put into output mode. The output mode is controlled by Serial Port 2.

IRSL1 127 I/O

T/O3/6

IRSL2 69 I/O

T/O3/6

IRSL3 71 I

IRTX 57 O

6/12

IR Transmit. IR serial output data.

1.0 Signal/Pin Connection and Description (Continued)

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1.4.9 Keyboard and Mouse Controller (KBC)

1.4.10 Musical Instrument Digital Interface (MIDI) Port

Signal Pin/s I/O Buffer Type Power Well Description

GA20 9 I/O

/OD

Gate A20. KBC gate A20 (P21) output.

KBCLK 111 I/O

/OD14VDD,V

Keyboard Clock. Transfers the keyboard clock between the SuperI/O chip and the external keyboard using the PS/2 protocol.

This pin is driven by the internal, inverted KBC P26 signal, and is connected internally to the T0 signal of the KBC. External pull-up resistor to 5V is required (for PS/2 compliance). The pin is monitored for wake-up event detection. To enable the activity during power off, it must be pulled up to Keyboard and Mouse standby voltage.

KBDAT 112 I/O

/OD14VDD,V

Keyboard Data. Transfers the keyboard data between the SuperI/O chip and the external keyboard using the PS/2 protocol.

This pin is driven by the internal, inverted KBC P27 signal, and is connected internally to KBC P10. External pull-up resistor to 5V is required (for PS/2 compliance). The pin is monitored for wake-up event detection. To enable the activity during power off, it must be pulled up to Keyboard and Mouse standby voltage.

KBRST 8 I/O

/OD

KBD Reset. Keyboard Reset (P20) output.

MCLK 113 I/O

/OD14VDD,V

Mouse Clock. Transfers the mouse clock between the SuperI/O chip and the external keyboard using the PS/2 protocol.

This pin is driven by the internal, inverted KBC P23 signal, and is connected internally to KBC T1. External pull-up resistor to 5V is required (for PS/2 compliance). The pin is monitored for wake-up event detection. To enable the activity during power off, it must be pulled up to Keyboard and Mouse standby voltage.

MDAT 114 I/O

/OD14VDD,V

Mouse Data. Transfers the mouse data between the SuperI/O chip and the external keyboard using the PS/2 protocol.

This pin is driven by the internal, inverted KBC P22 signal, and is connected internally to KBC P11. External pull-up resistor to 5V is required (for PS/2 compliance). The pin is monitored for wake-up event detection. To enable the activity during power off, it must be pulled up to Keyboard and Mouse standby voltage.

P12, P16, P17

6,127, 7

I/O

/OD

I/O Port. KBC open-drain signal for general-purpose input and output, controlled by KBC ﬁrmware.

Signal Pin(s) I/O Buffer Type Power Well Description

MDTX 125 O

3/6

MIDI Transmit. MIDI serial data output.

MDRX 126 I

MIDI Receive. MIDI serial data input.

1.0 Signal/Pin Connection and Description (Continued)

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1.4.11 Parallel Port

1.4.12 Power and Ground

Signal Pin/s I/O Buffer Type Power Well Description

ACK 79 I

Acknowledge. Pulsed low by the printer to indicate that it has received data from the Parallel Port.

AFD_DSTRB 93 O

14,O14/14

AFD - Automatic Feed. When low, instructs the printer to automatically feed a line after printing each line. This pin is in TRI-STATE after a 0 is loaded into the corresponding control register bit. An external 4.7 KΩ pull-up resistor should be attached to this pin.

DSTRB - Data Strobe (EPP). Active low, used in EPP mode to denote a data cycle. When the cycle is aborted,

DSTRB

becomes inactive (high).

BUSY_

WAIT 78 I

Busy. Set high by the printer when it cannot accept another character.

Wait. In EPP mode, the Parallel Port device uses this active low signal to extend its access cycle.

ERR 91 I

Error. Set active low by the printer when it detects an error.

INIT 89 O

14,O14/14

Initialize. When low, initializes the printer. This signal is in TRI-STATE after a 1 is loaded into the corresponding control register bit. Use an external 4.7 KΩ pull-up resistor.

PD7-5 PD4-3, PD2, PD1 PD0

80-82 85-86 88, 90 92

I/O

14,O14/14

Parallel Port Data. Transfer data to and from the peripheral data bus and the appropriate Parallel Port data register. These signals have a high current drive capability.

PE 77 I

Paper End. Set high by the printer when it is out of paper. This pin has an internal weak pull-up or pull-down resistor.

SLCT 76 I

Select. Set active high by the printer when the printer is selected.

SLIN_ASTRB 87 O

14,O14/14

SLIN - Select Input. When low, selects the printer. This signal is in TRI-STATE after a 0 is loaded into the corresponding control register bit. Uses an external 4.7 KΩ pull-up resistor.

ASTRB - Address Strobe (EPP). Active low, used in EPP mode to denote an address or data cycle. When the cycle is aborted,

ASTRB becomes inactive (high).

STB_WRITE 94 O

14,O14/14

STB - Data Strobe. When low, Indicates to the printer that valid data is available at the printer port. This signal is in TRISTATE after a 0 is loaded into the corresponding control register bit. An external 4.7 KΩ pull-up resistor should be employed.

WRITE - Write Strobe. Active low, used in EPP mode to denote an address or data cycle. When the cycle is aborted, WRITE becomes inactive (high).

Signal Pin/s I/O Buffer Type Power Well Description

45 I AGND - Analog Ground

44 I PWR -

Analog 3.3V Power Supply Provides power to the analog circuits.

BAT

30 I

ULR

Battery Power Supply. Provides battery back-up to the System Wake-Up Control registers, when V

is lost (power-fail). The

pin is connected to the internal logic through a series resistor for UL protection.

1.0 Signal/Pin Connection and Description (Continued)

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1.4.13 Protection

1.4.14 Serial Port 1 and Serial Port 2

20, 52, 83, 115

I PWR - Main 3.3V Power Supply

31 I PWR -

Standby 3.3V Power Supply. Provides power to the Wake-Up Control circuitry, while the main power supply is turned off.

19, 51, 84, 116

I GND - Ground

Signal Pin(s) I/O Buffer Type Power Well Description

CHASI 29 I

Chassis Intrusion Input. Any change of this pin sets the intrusion detection. For correct operation, this pin must be tied to V

when it is not used.

CHASO 28 O

Chassis Intrusion Output. When low, indicates that an intrusion indication is set.

Signal Pin/s I/O Buffer Type Power Well Description

CTS1 CTS2

100 108

Clear to Send. When low, indicate that the modem or other data transfer device is ready to exchange data.

DCD1 DCD2

95 103

Data Carrier Detected. When low, indicate that the modem or other data transfer device has detected the data carrier.

DSR1 DSR2

96 104

Data Set Ready. When low, indicate that the data transfer device, e.g., modem, is ready to establish a communications link.

DTR1_ BOUT1

DTR2_ BOUT2

101

109

3/6

Data Terminal Ready. When low, indicate to the modem or other data transfer device that the UART is ready to establish a communications link. After a system reset, these pins provide the DTR function and set these signals to inactive high. Loopback operation holds them inactive.

Baud Output. Provides the associated serial channel baud rate generator output signal if test mode is selected, i.e., bit 7 of the EXCR1 Register is set.

DTR1_BOUT1 is used also as BADDR.

RI1 RI2

102 110

VDD,V

Ring Indicator. When low, indicate that a telephone ring signal has been received by the modem. They are monitored during power-off for wake-up event detection.

RTS1 RTS2

98 106

3/6

Request to Send. When low, indicate to the modem or other data transfer device that the corresponding UART is ready to exchange data. A system reset sets these signals to inactive high, and loopback operation holds them inactive.

RTS1 is used also as TEST.

SIN1 SIN2

97 105

Serial Input. Receive composite serial data from the communications link (peripheral device, modem or other data transfer device).

SOUT1 SOUT2

99 107

3/6

Serial Output. Send composite serial data to the communications link (peripheral device, modem or other data transfer device). These signals are set active high after a system reset.

Signal Pin/s I/O Buffer Type Power Well Description

1.0 Signal/Pin Connection and Description (Continued)

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1.4.15 Strap Configuration

1.4.16 System Hardware Monitoring

Signal Pin/s I/O Buffer Type Power Well Description

BADDR 101 I

STRP

Base Address. Sampled by the trailing edge of the system reset to determine the base address of the conﬁguration Index-Data register pair. During reset, it is pulled down by internal 30Kohm resistor.

If no pull-up resistor is connected, it is sampled low, setting the Index-Data pair at 2Eh-2Fh.

Connecting a 10K external pull-up resistor to V

would make it

sample high, setting the Index-Data pair at 4Eh-4Fh.

PSLDC0 PSLDC199107

STRP

Note 1.

Note 1.Make sure that the Serial Port driver is back-drive protected.

Power Supply and LED Conﬁguration. If no pull-up resistor is connected to these pins, pins 33-35 and 37 function as PWBTOUT, PSON, PWBTIN and SLPS5 respectively. Connecting a 10K external pull-up resistor to V

causes these

pins to function as GPOS0, GPOS1, GPIS2, and AVI0, respectively.

PSONPOL 109 I

STRP

Note 1.

Power Supply On Polarity. If no pull-up resistor is connected to this pin, PSON is set active low with open-drain output. Connecting a 10K external pull-up resistor to V

causes PSON

to be set to active high with push-pull output.

TEST 98 I

STRP

Test. If sampled high on the trailing edge of system reset, this signal forces the device into test mode. This pin is for National Semiconductor use only, and should be left unconnected.

Signal Pin(s) I/O Buffer Type Power Well Description

ALARM 27 O

Alarm. Alerts on voltage input mismatch

AVI0-6 37-43 I

AN1

Analog Voltage Inputs. Analog inputs of the A/D converter.

D1N D2N

47 49

AN3

Diode Cathode. Diodes 1 and 2 return current sink. Must be grounded when not used.

D1P D2P

48 50

AN2

Diode Anode. Diodes 1 and 2 current source. Connected to remote discrete diodes

OTS1 OTS2

24 25

Overtemperature Shutdown. Indicate that an overtemperature was detected. See Section 2.8.9, the SuperI/O Conﬁguration A register, bit 0, for further details on which pin/s is/are active for remote and local temperature sensing.

TS1-3 47-49 I

AN1

Thermistor Sensors. Analog inputs.

REF

46 I/O

AN2,OAN1

Reference Voltage. Provides reference voltage for the on-chip A/D circuits. An external reference voltage should be connected to this input.

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