Z86E7332256313.0V to 5.5V
Z86E7216768313.0V to 5.5V
Note: *General-Purpose
■
Low Power Consumption - 60 mW (Typical)
■
Two Standby Modes (Typical)
–STOP - 2 µ A
–HALT - 0.8 mA
■
Special Architecture to Automate Both Generation and
Reception of Complex Pulses or Signals:
–One Programmable 8-Bit Counter/Timer with Two
–One Programmable 16-Bit Counter/Timer with
–Programmable Input Glitch Filter for Pulse
(KB)
Capture Registers
One Capture Register
Reception
RAM*
(Bytes)I/O
Voltage
Range
Z86E72/73
OTP IR M
■
Five Priority Interrupts
–Three External
–Two Assigned to Counter/Timers
■
Two Independent Comparators with Programmable
Interrupt Polarity
■
On-Chip Oscillator that Accepts a Crystal, Ceramic
Resonator, LC, RC (mask option), or External Clock
Drive
■
Software Selectable 200 kOhms Pull-Ups on Ports 0 and
Port 2
–All Eight Port 2 Bits at One Time or Not Pull-Ups
Automatically Disabled Upon Selecting Individual
Pins as Outputs.
■
Software Mouse/Trackball Interface on P00 Through
P03
ICROCONTROLLERS
1
GENERAL DESCRIPTION
The Z86E7X family of IR (Infrared) CCP
troller Processor) are OTP-based members of the Z8
gle-chip microcontroller family with 256 or 768 bytes of
general-purpose RAM. The only differentiating factor between the E72/73 versions is the availability of RAM and
ROM. This EPROM Microcontroller family of OTP IR controllers also offer the use of external memory which enables this Z8 microcontroller to be used where code flexibility is required. Zilog's CMOS microcontrollers offer fast
execution, efficient use of memory, sophisticated interrupts, input/output bit manipulation capabilities, automated
pulse generation/reception, and easy hardware/software
system expansion along with cost-effective and low power
consumption.
DS96LVO1100
™
(Consumer Con-
®
P R E L I M I N A R Y
sin-
The Z86E7X architecture is based on Zilog's 8-bit microcontroller core with an Expanded Register File to allow access to register mapped peripherals, I/O circuits, and powerful counter/timer circuitry. The CCP offers a flexible I/O
scheme, an efficient register and address space structure,
and a number of ancillary features that are useful in many
consumer, automotive, computer peripheral, and battery
operated hand-held applications.
™
CCP
applications demand powerful I/O capabilities. The
Z86L7X family fulfills this with five package options in
which the E72/73/L74 versions provide 31 pins of dedicated input and output. These lines are grouped into four
ports. Each port consists of eight lines (Port 3 has seven
lines of I/O and one Pref comparator input) and is config-
1-1
Z86E72/E73
OTP IR Microcontrollers
GENERAL DESCRIPTION (Continued)
urable under software control to provide timing, status signals, parallel I/O with or without handshake, and an address/data bus for interfacing external memory.
There are five basic address spaces available to support a
wide range of configurations: Program Memory, Register
FIle, Expanded Register File, Extended Data RAM and External Memory. The register file is composed of 256 bytes
of RAM. It includes four I/O port registers, 16 control and
status registers and the rest are General Purpose registers. The Extended Data RAM adds 512 (E72) of usable
general-purpose registers. The Expanded Register File
consists of two additional register groups (F and D).
To unburden the program from coping with such real-time
problems as generating complex waveforms or receiving
and demodulating complex waveform/pulses, the Z86E7X
HI16
8
family offers a new intelligent counter/timer architecture
with 8-bit and 16-bit counter/timers (Figure 1). Also included are a large number of user-selectable modes, and two
on-board comparators to process analog signals with separate reference voltages (Figure 2).
Notes: All Signals with a preceding front slash, "/", are ac-
tive Low, e.g., B//W (WORD is active Low); /B/W (BYTE is
active Low, only).
Power connections follow conventional descriptions below:
* Voltage on all pins with respect to GND.
† See Ordering Information.
Supply V oltage (*)–0.3+7.0V
CC
Storage Temp.–65 ° +150 ° C
STG
T
Oper. Ambient Temp.†C
A
STANDARD TEST CONDITIONS
The characteristics listed below apply for standard test
conditions as noted. All voltages are referenced to GND.
Positive current flows into the referenced pin (Figure 13).
Stresses greater than those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; operation of the device at
any condition above those indicated in the operational sections of these specifications is not implied. Exposure to absolute maximum rating conditions for an extended period
may affect device reliability.
From Output
Under Test
150 pFI
Figure 9. Test Load Diagram
CAPACITANCE
T
= 25 ° C, V
A
Input capacitance12 pF
Output capacitance12 pF
I/O capacitance12 pF
= GND = 0V, f = 1.0 MHz, unmeasured pins returned to GND.
CC
ParameterMax
1-10
P R E L I M I N A R Y
DS96LVO1100
1
DC CHARACTERISTICS
Preliminary
Z86E72/E73
OTP IR Microcontrollers
Sym.Parameter
Max Input Voltage3.0V
V
Clock Input
CH
High V oltage
Clock Input
V
CL
Low V oltage
Input High Voltage3.0V
V
IH
Input Low Voltage3.0V
V
IL
V
V
Output High Voltage3.0V
OH1
Output High Voltage
OH2
(P00,P01,P36, P37)
V
V
V
Output Low Voltage3.0V
OL1
Output Low Voltage3.0V
OL2*
Output Low Voltage
OL2
(P00, P01, P36,P37)
V
Reset Input
RH
High V oltage
Reset Input
V
Rl
Low V oltage
V
OFFSET
Comparator Input
Offset V oltage
I
Input Leakage3.0V
IL
I
Output Leakage3.0V
OL
I
Reset Input Current3.0V
IR
I
Supply Current
CC
(WDT off)
V
CC
5.5V
3.0V
5.5V
3.0V
5.5V
5.5V
5.5V
5.5V
3.0V
5.5V
5.5V
5.5V
3.0V
5.5V
3.0V
5.5V
3.0V
5.5V
3.0V
5.5V
5.5V
5.5V
5.5V
3.0V
5.5V
= 0°C to +70°C
T
A
Typical
MinMax@ 25°CUnitsConditions
0.9 V
CC
0.9 V
CC
VSS –0.3
V
–0.3
SS
0.7 V
CC
0.7 V
CC
VSS –0.3
V
–0.3
SS
VCC –0.4
V
–0.4
CC
VCC 0.7
V
0.7
CC
0.8 V
CC
0.8 V
CC
VSS –0.3
V
–0.3
SS
–1
–1
–1
–1
7
7
VCC + 0.3
V
+ 0.3
CC
0.2 V
CC
0.2 V
CC
VCC + 0.3
V
+ 0.3
CC
0.2 V
CC
0.2 V
CC
0.4
0.4
0.8
0.8
0.8
0.8
V
CC
V
CC
0.2 V
CC
0.2 V
CC
25
25
1
1
1
1
–230
–400
10
15
0.5 V
0.5 V
0.5 V
0.5 V
2.9
5.4
0.1
0.2
0.5
0.3
0.3
0.2
1.5
2.5
0.9
1.8
10
10
< 1
< 1
< 1
< 1
–50
–80
4
10
CC
CC
CC
CC
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
mV
mV
µA
µA
µA
µA
µA
µA
mA
mA
IIN 250 µA
I
250 µA
IN
Driven by External
Clock Generator
Driven by External
Clock Generator
= –0.5 mA
I
OH
I
= –0.5 mA
OH
= –7 mA
I
OH
I
= –7 mA
OH
IOL = 1.0 mA
I
= 4.0 mA
OL
IOL = 5.0 mA
I
= 7.0 mA
OL
IOL = 10 mA
I
= 10 mA
OL
VIN = 0V, V
VIN = 0V, V
VIN = 0V, V
VIN = 0V, V
@ 8.0 MHz
@ 8.0 MHz
CC
CC
CC
CC
DS96LVO1100
P R E L I M I N A R Y
1-11
Z86E72/E73
OTP IR Microcontrollers
DC CHARACTERISTICS (Continued)
Sym.Parameter
I
CC1
Standby Current
(WDT Off)
I
CC2
T
Standby Current3.0V
Power-On Reset3.0V
POR
VramStatic RAM Data
Retention V oltage
V
LV
(Vbo)
Notes:
Low Voltage
V
CC
Protection
I
CC1
Crystal/Resonator
3.0V
TA = 0°C to +70°C
V
CC
MinMax@ 25°CUnits ConditionsNotes
3
Typical
1
mAmAHALT Mode
VIN = 0V, V
CC
1,2
@ 8.0
MHz
5.5V
5
4
HALT Mode
V
= 0V, V
IN
CC
1,2
@ 8.0 MHz
3.0V
2
0.8
mAmAClock Divide-by-16 @
1,2
8.0 MHz
5.5V
4
2.5
Clock Divide-by-16 @
1,2
8.0 MHz
8
2
µAµASTOP Mode
VIN = OV, V
CC
3,5
WDT is not Running
STOP Mode
5.5V
10
3
VIN = 0V, V
CC
3,5
WDT is not Running
3.0V
5.5V
500
800
310
600
µAµASTOP Mode
VIN = 0V, V
3,5
CC
WDT is Running
5.5V
12
5
75
20
18
ms
7
ms
Vram0.80.5V6
2.151.7V8 MHz max
Ext. CLK Freq.
Typ
3.0 mA
Max
5
Unit
mA
Frequency
8.0 MHz
4
External Clock Drive
1. All outputs unloaded, inputs at rail.
2. CL1 = CL2 = 100 pF
3. Same as note [4] except inputs at V
4. The V
5. Oscillator stopped.
6. Oscillator stops when VCC falls below Vlv limit
7. 32 kHz clock driver input.
* All Outputs excluding P00, P01, P36, and P37.
increases as the temperature decreases.
LV
0.3 mA
CC
5
.
mA
8.0 MHz
1-12P R E L I M I N A R YDS96LVO1100
1
AC CHARACTERISTICS
External I/O or Memory Read and Write Timing
R//W
Z86E72/E73
OTP IR Microcontrollers
Port 0, /DM
Port 1
/AS
/DS
(Read)
Port 1
12
16
18
3
13
19
20
A7 - A0D7 - D0 IN
21
811
4
5
17
6
9
10
D7 - D0 OUTA7 - A0
/DS
(Write)
14
7
Figure 10. External I/O or Memory Read/Write Timing
15
DS96LVO1100P R E L I M I N A R Y1-13
Z86E72/E73
OTP IR Microcontrollers
AC CHARACTERISTICS
Preliminary
External I/O or Memory Read and Write Timing Table
No. SymbolParameter
1TdA(AS)Address V alid to
/AS Rising Delay
2TdAS(A)/AS Rising to Address Float Delay3.0V
3TdAS(DR)/AS Rising to Read Data Required Valid3.0V
4TwAS/AS Low Width3.0V
5TdAddress Float to
/DS Falling
6TwDSR/DS (Read) Low Width3.0V
7TwDSW/DS (Write) Low Width3.0V
8TdDSR(DR)/DS Falling to Read Data Required Valid3.0V
9ThDR(DS)Read Data to
/DS Rising Hold Time
10 TdDS(A)/DS Rising to Address Active Delay 3.0V
11 TdDS(AS)/DS Rising to /AS
Falling Delay
12 TdR/W(AS)R//W Valid to /AS
Rising Delay
13 TdDS(R/W)/DS Rising to
R//W Not Valid
14 TdDW(DSW) Write Data Valid to /DS Falling (Write)
Delay
15 TdDS(DW)/DS Rising to Write
Data Not Valid Delay
16 TdA(DR)Address Valid to Read Data Required
Valid
17 TdAS(DS)/AS Rising to
/DS Falling Delay
18 TdDM(AS)/DM Valid to /AS
Falling Delay
19 TdDS(DM)/DS Rise to
/DM Valid Delay
20 ThDS(A)/DS Rise to Address Valid Hold Time3.0V
Notes:
1. When using extended memory timing add 2 TpC.
2. Timing numbers given are for minimum TpC.
Standard Test Load
All timing references use 0.9 V
for a logic 1 and 0.1 VCC for a logic 0.
CC
V
CC
3.0V
5.5V
5.5V
5.5V
5.5V
3.0V
5.5V
5.5V
5.5V
5.5V
3.0V
5.5V
5.5V
3.0V
5.5V
3.0V
5.5V
3.0V
5.5V
3.0V
5.5V
3.0V
5.5V
3.0V
5.5V
3.0V
5.5V
3.0V
5.5V
3.0V
5.5V
5.5V
TA = 0°C to +70°C
16 MHz
Min.Max.UnitsNotes
55
55
70
70
400
400
80
80
0
0
300
300
165
165
260
260
0
0
85
95
60
70
70
70
70
70
80
80
70
80
475
475
100
100
55
55
70
70
70
70
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
2
2
1,2
1,2
2
2
1,2
1,2
1,2
2
2
2
2
2
2
1,2
2
2
2
1-14P R E L I M I N A R YDS96LVO1100
1
AC CHARACTERISTICS
Additional Timing Diagram
Z86E72/E73
OTP IR Microcontrollers
Clock
T
IN
IRQ
Clock
Setup
1
223
77
4
5
6
N
8
9
3
Stop
Mode
Recovery
Source
11
10
Figure 11. Additional Timing
DS96LVO1100P R E L I M I N A R Y1-15
Z86E72/E73
OTP IR Microcontrollers
AC CHARACTERISTICS
Preliminary
Additional Timing Table
NoSymbolParameter
1TpCInput Clock Period3.0V
2TrC,TfCClock Input Rise and Fall Times3.0V
3TwCInput Clock Width3.0V
4TwTinLTimer Input Low Width3.0V
5TwTinHTimer Input High Width3.0V
6TpTiTimer Input Period3.0V
7TrTin,TfTi Timer Input Rise and Fall Timers3.0V
8ATwILInterrupt Request Low Time3.0V
8BTwILInt. Request Low Time 4.5V
9TwIHInterrupt Request Input High Time4.5V
10TwsmStop-Mode Recovery Width Spec3.0V
11TostOscillator Start-up Time3.0V
12TwdtWatch-Dog Timer Delay Time
(5 ms)
(10 ms)3.0V
(20 ms)3.0V
(80 ms)3.0V
Notes:
1. Timing Reference uses 0.9 V
2. Interrupt request through Port 3 (P33-P31).
3. Interrupt request through Port 3 (P30).
4. SMR – D5 = 0
5. Reg. WDTMR
6. Reg. SMR – D5 = 0
7. Reg. SMR – D5 = 1
for a logic 1 and 0.1 VCC for a logic 0.
CC
V
CC
5.5V
5.5V
5.5V
5.5V
5.5V
5.5V
5.5V
5.5V
5.5V
5.5V
5.5V
3.0V
5.5V
5.5V
3.0V
5.5V
5.5V
5.5V
5.5V
TA = 0°C to +70°C
MinMaxUnitsNotes
121
121
37
37
100
70
DC
DC
25
25
ns
ns
ns
ns
ns
ns
ns
ns
3TpC
3TpC
8TpC
8TpC
100
70
100
70
3TpC
5TpC
5TpC
5TpC
12
12
ns
ns
ns
ns
ns
ns
1,2
1,2
1,3
1,3
1,2
1,2
5TpC
5TpC
5TpC
5TpC
12
5
25
10
50
20
225
80
75
20
150
40
300
80
1200
320
ms
ms
ms
ms
ms
ms
ms
ms
1
1
1
1
1
1
1
1
1
1
7
7
6
6
4
1-16P R E L I M I N A R YDS96LVO1100
1
AC CHARACTERISTICS
Handshake Timing Diagrams
Z86E72/E73
OTP IR Microcontrollers
Data In
/DAV
(Input)
RDY
(Output)
Data Out
/DAV
(Output)
1
Data In Valid
3
7
Next Data In Valid
2
Delayed DAV
4
Figure 12. Input Handshake Timing
Data Out Valid
56
Delayed RDY
Next Data Out Valid
Delayed DAV
RDY
(Input)
89
10
Figure 13. Output Handshake Timing
11
Delayed RDY
DS96LVO1100P R E L I M I N A R Y1-17
Z86E72/E73
OTP IR Microcontrollers
AC CHARACTERISTICS
Preliminary
Handshake Timing Table
NoSymbolParameter
1TsDI(DAV)Data In Setup Time4.0V
2ThDI(DAV)Data In Hold Time4.0V
3TwDAVData Available Width4.0V
4TdDAVI(RDY)DAV Falling to RDY
Falling Delay
5TdDAVId(RDY)DAV Rising to RDY
Falling Delay
6TdRDYO(DAV)RDY Rising to DAV
Falling Delay
7TdDO(DAV)Data Out to DAV
Falling Delay
8TdDAV0(RDY)DAV Falling to RDY
Falling Delay
9TdRDY0(DAV)RDY Falling to DAV
Rising Delay
10TwRDYRDY Width4.0V
11TdRDY0d(DAV)RDY Rising to DAV
Falling Delay
V
CC
5.5V
5.5V
5.5V
4.0V
5.5V
4.0V
5.5V
4.0V
5.5V
4.0V
5.5V
4.0V
5.5V
4.0V
5.5V
5.5V
4.0V
5.5V
TA = 0°C to +70°C
16 MHzData
MinMaxDirection
0IN
IN
0
0
155
110
160
115
120
80
0
0
63
63
0
0
160
115
110
80
110
80
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
1-18P R E L I M I N A R YDS96LVO1100
1
PIN FUNCTIONS
Z86E72/E73
OTP IR Microcontrollers
/DS (Output, active Low). Data Strobe is activated once for
each external memory transfer. For a READ operation,
data must be available prior to the trailing edge of /DS. For
WRITE operations, the falling edge of /DS indicates that
output data is valid.
/AS (Output, active Low). Address Strobe is pulsed once
at the beginning of each machine cycle. Address output is
through Port 0/Port 1 for all external programs. Memory
address transfers are valid at the trailing edge of /AS. Under program control, /AS is placed in the high-impedance
state along with Ports 0 and 1, Data Strobe, and
Read/Write.
XTAL1 Crystal 1 (time-based input). This pin connects a
parallel-resonant crystal, ceramic resonator, LC, or RC
network or an external single-phase clock to the on-chip
oscillator input.
XTAL2 Crystal 2 (time-based output). This pin connects a
parallel-resonant, crystal, ceramic resonant, LC, or RC
network to the on-chip oscillator output.
R//W Read/Write (output, write Low). The R//W signal is
Low when the CCP is writing to the external program or
data memory.
R//RL (input). This pin, when connected to GND, disables
the internal ROM and forces the device to function as a
ROMless Z8. (Note that, when left unconnected or pulled
high to V
sion.)
, the part functions normally as a Z8 ROM ver-
CC
Port 0 (P07-P00). Port 0 is an 8-bit, bidirectional, CMOS
compatible port. These eight I/O lines are configured under software control as a nibble I/O port, or as an address
port for interfacing external memory. The output drivers
are push-pull. Port 0 is placed under handshake control. In
this configuration, Port 3, lines P32 and P35 are used as
the handshake control /DAV0 and RDY0. Handshake signal direction is dictated by the I/O direction to Port 0 of the
upper nibble P07-P04. The lower nibble must have the
same direction as the upper nibble.
For external memory references, Port 0 can provide address bits A11-A8 (lower nibble) or A15-A8 (lower and upper nibble) depending on the required address space. If
the address range requires 12 bits or less, the upper nibble
of Port 0 can be programmed independently as I/O while
the lower nibble is used for addressing. If one or both nibbles are needed for I/O operation, they must be configured
by writing to the Port 0 mode register. After a hardware reset, Port 0 is configured as an input port.
Port 0 is set in the high-impedance mode if selected as an
address output state along with Port 1 and the control signals /AS, /DS, and R//W (Figure 8).
A software option is available to program 0.4 VDD CMOS
trip inputs on P00-P03. This allows direct interface to
mouse/trackball IR sensors.
An optional 200 kOhm pull-up is available as a software
option of all Port 0 bits with nibble select.
These pull-ups are disabled when configured (bit by bit) as
an output.
DS96LVO1100P R E L I M I N A R Y1-19
Z86E72/E73
OTP IR Microcontrollers
PIN FUNCTIONS (Continued)
Z86LXX
MCU
4
Port 0 (I/O or A15 - A8)
4
Optional
Handshake Controls
/DAV0 and RDY0
(P32 and P35)
OEN
Out
In
In
0.4 VDD
Trip Point Buffer
* Note: On P00 and P07 only.
** POIM, DI, DO Mask Selectable.
*** Refer to the Z86C17 specification for
application information in utilizing these
inputs in a mouse or trackball application.
Mask
Option
200 kΩ
PAD
Figure 14. Port 0 Configuration
1-20P R E L I M I N A R YDS96LVO1100
Z86E72/E73
1
OTP IR Microcontrollers
Port 1 (P17-P10). Port 1 is a multiplexed Address (A7-A0)
and Data (D7-D0), CMOS compatible port. Port 1 is dedicated to the Zilog ZBus®-compatible memory interface.
The operations of Port 1 are supported by the Address
Strobe (/AS) and Data Strobe (/DS) lines, and by the
Read/Write (R//W) and Data Memory (/DM) control lines.
Data memory read/write operations are done through this
8
Z86LXX
MCU
port (Figure 20). If more than 256 external locations are required, Port 0 outputs the additional lines.
Port 1 can be placed in the high-impedance state along
with Port 0, /AS, /DS, and R//W, allowing the Z86L7X to
share common resources in multiprocessor and DMA applications. Port1 can also be configured for standard port
output mode.
Port 1
(I/O or AD7 - AD0)
Optional
Handshake Controls
/DAV1 and RDY1
(P33 and P34)
OEN
Out
In
PAD
Auto Latch
R ≈ 500 KΩ
Figure 15. Port 1 Configuration
DS96LVO1100P R E L I M I N A R Y1-21
Z86E72/E73
OTP IR Microcontrollers
PIN FUNCTIONS (Continued)
Port 2 (P27-P20). Port 2 is an 8-bit, bidirectional, CMOS
compatible I/O port. These eight I/O lines can be independently configured under software control as inputs or outputs. Port 2 is always available for I/O operation. A software option is available to connect eight 200 kOhms
(±50%) pull-up resistors on this port. Bits programmed as
outputs are globally programmed as either push-pull or
open-drain. Port 2 may be placed under handshake control. In this configuration, Port 3 lines, P31 and P36 are
used as the handshake controls lines /DAV2 and RDY2.
Z86LXX
MCU
The handshake signal assignment for Port 3, lines P31
and P36 is dictated by the direction (input or output) assigned to Bit 7, Port 2 (Figure 10).
The CCP wakes up with the eight bits of Port 2 configured
as inputs with open-drain outputs.
Port 2 also has an 8-bit input OR and an AND gate which
can be used to wake up the part. P20 can be programmed
to access the edge selection circuitry (Figure 21).
Port 2 (I/O)
Optional
Handshake Controls
/DAV2 and RDY2
(P31 and P36)
(L72/E72 Only)
Open-Drain
OEN
Out
In
VCC
200 kΩ
Mask
Option
PAD
Figure 16. Port 2 Configuration
1-22P R E L I M I N A R YDS96LVO1100
Z86E72/E73
1
OTP IR Microcontrollers
Port 3 (P37-P31). Port 3 is a 7-bit, CMOS compatible three
fixed input and four fixed output port. Port 3 consists of
three fixed input (P33-P31) and four fixed output (P37P34), and can be configured under software control for Input/Output, Interrupt, Port handshake, Data Memory functions and output from the counter/timers. P31, P32, and
P33 are standard CMOS inputs; outputs are push-pull.
Two on-board comparators process analog signals on P31
and P32 with reference to the voltage on Pref1 and P33.
The analog function is enabled by programming the Port 3
Mode Register (bit 1). P31 and P32 are programmable as
rising, falling, or both edge triggered interrupts (IRQ regis-
Counter/Timer
T8
P34 OUT
P31
PREF1
+
-
COMP1
P34 OUT
ter bits 6 and 7). Pref1 and P33 are the comparator reference voltage inputs. Access to the Counter Timer edge detection circuit is through P31 or P20 (see CTR1
description).
Port 3 provides the following control functions: handshake
for Ports 0, 1, and 2 (/DAV and RDY); three external interrupt request signals (IRQ2-IRQ0); Data Memory Select
(/DM) (Table 8).
Port 3 also provides output for each of the counter/timers
and the AND/OR Logic. Control is performed by programming bits D5-D4 of CTRI, bit 0 of CTR0 and bit 0 of CTR2.
P34
PAD
CTR0
0 Normal Control
D0
1 8-bit Timer output active
P37 OUT
P32
P33 (PREF2)
+
-
COMP2
PCON
0 = P34, P37 Standard Output
D0
1 = P34, P37 Comparator Output
Reset condition.
*
Figure 17. Port 3 Configuration
P37
PAD
*
DS96LVO1100P R E L I M I N A R Y1-23
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