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Genesys Logic, Inc.
GL651USB
Genesys Logic, Inc.
2-PORT USB KEYBOARD HUB
CONTROLLER
DATA SHEET
Version 1.0, Feb. 11, 2000
10F, No.11, Ln.3, Tsao Ti Wei, Shenkeng, Taipei, Taiwan
Tel: 886-2-2664-6655 Fax: 886-2-2664-5757
http://www.genesyslogic.com
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GL651USB USB KEYBOARD HUB CONTROLLER
1 FEATURES
• High performance and low-cost solution for USB keyboard with hub solution
• USB Specification Compliance
− Conforms to USB specification Rev. 1.1
− Conforms to HID Class specification Rev. 1.0
− Supports 1 device address for hub, 1 device address for keyboard
− Supports 2 endpoints of hub, 3 endpoints for keyboard
• 8-bit micro-processor
− RISC-like architecture
− USB optimized instruction set
− Single cycle instruction execution
− Operation Speed: DC to 24 MHz clock input
− Performance: 12 MIPS @ 24MHz
• I/O ports
− Up to 20 output pins for key matrix drive pin
− Up to 8 input pins for key matrix sense pin
− Up to 5 I/O pins with LED drive capability : 3 for keyboard, 2 for hub
− Up to 8 general purpose I/O pins for customization
• Internal memory
− 80 bytes of RAM
− 3.25K × 14 of program ROM
− larger size of ROM makes it possible for customization
• On-chip 3.3v output
− No external regulator required
• Integrated USB transceiver
• 12 MHz external clock
• Improved output drivers with slew-rate control to reduce EMI
• Internal power-on reset(POR)
• Internal power-fail detector for ESD recovery
• Support suspend/normal mode power management
• Remote wakeup is supported for both keyboard and hub
• Support power management for downstream port devices
• Automatic switching between self/bus powered mode
• Smart LED traffic indicator
− The higher data traffic flows through the hub downstream port, the higher
frequency that port’s LED will blink.
• 100 pin LQFP package for demo, COB structure is supported
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GL651USB USB KEYBOARD HUB CONTROLLER
2 FUNCTION OVERVIEW
The GL651USB is an USB keyboard hub with 1 upstream port and 2 downstream ports.
It integrates USB keyboard and hub in a single chip to add extra value to traditional
keyboard and lower its total cost. The GL651USB uses an 8-bit RISC-like uC to
encode/decode the host commands and to decode the keyboard matrix data. Its 8 generalpurpose I/O(GPIO) pins and the uC-based structure make the implementation of
customization very easy. The GL651USB supports 20 drive pins to meet the diversity of
keyboard matrix. Besides, 5 GPIO pins support the LED driving, 3 for keyboard and 2
for hub. Hence vendors can decide whether or not to enable the hub LED function easily.
For giving more design flexibility, the power supply of GL651USB can be switched
automatically: self-power or bus-power. In the same way, vendors can pullup/pulldown
the SELF pin to support only self/bus power if they have cost issue. The GL651USB can
be configured as ganged/individual mode for hub functions by strapping through
pullup/pulldown the SUSPND pin. To prevent from abnormal current consumption of
downstream port devices, the GL651USB supplies power enable flags by reading the
over-current flags. By hub LED, The GL651USB also supports smart traffic indication,
i.e., the higher data traffic flows through one port, the higher frequency of that port’s
LED blinks. In order to minimize the power consumption, the GL651USB will turn LED
off and stop the clock automatically when it is suspended.
The GL651USB is the most featured and flexible product for those venders who are
looking for “USB Keyboard with Hub” solution. Besides, vendors can easily modify their
board circuits to meet their own requirement if they have product differentiation or cost
issues. Further more, if vendor has the requirement of saving their package cost, COB
componen t also can be supplied by request.
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GL651USB USB KEYBOARD HUB CONTROLLER
3 PIN DEFINITIONS AND DESCRIPTIONS
l GL651USB
Pin No. Name I/O Description
3 GND - Analog ground
5 DM2 I/O Downstream port 2 USB data7 DP2 I/O Downstream port 2 USB data+
9 DM0 I/O Upstream port USB data11 DP0 I/O Upstream port USB data+
13 VCP - 3.3V output
15 DM1 I/O Downstream port 1 USB data17 DP1 I/O Downstream port 1 USB data+
19 VDD - VCC(5V)
21 NUMLOCK I/O Keyboard Num LOCK LED
Also can be used as general purpose pin GPIO0
23 CAPSLOCK I/O Keyboard Caps Lock LED
Also can be used as general purpose pin GPIO1
25 SCLOCK I/O Keyboard Scroll Lock LED
Also can be used as general purpose pin GPIO2
27 TEST I Test mode input: (internal pull low)
For 48 Mhz oscillator clock input, pull high
For 12 Mhz crystal clock input, floating
29 DRV1 O Key matrix drive output 1
31 DRV2 O Key matrix drive output 2
32 DRV3 O Key matrix drive output 3
34 DRV4 O Key matrix drive output 4
35 DRV5 O Key matrix drive output 5
37 DRV6 O Key matrix drive output 6
38 DRV7 O Key matrix drive output 7
40 DRV8 O Key matrix drive output 8
41 DRV9 O Key matrix drive output 9
43 DRV10 O Key matrix drive output 10
44 DRV11 O Key matrix drive output 11
46 DRV12 O Key matrix drive output 12
47 DRV13 O Key matrix drive output 13
49 DRV14 O Key matrix drive output 14
50 DRV15 O Key matrix drive output 15
52 GND - GND
54 DRV16 O Key matrix drive output 16
56 DRV17 O Key matrix drive output 17
58 DRV18 O Key matrix drive output 18
60 DRV19 O Key matrix drive output 19
62 DRV20 O Key matrix drive output 20
64 SUSPND I/O Suspend indication output and individual setting input
Pull low: individual mode.
Pull high: ganged mode
66 GPIO7 I/O General purpose pin 7
68 GPIO6 I/O General purpose pin 6
70 VDD - VCC(5V)
72 GPIO5 I/O General purpose pin 5
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GL651USB USB KEYBOARD HUB CONTROLLER
73 GPIO4 I/O General purpose pin 4
75 GPIO3 I/O General purpose pin 3
76 RESET I Reset input
78 SELF I 1: self-powered. 0: bus-powered
79 SENSE1 I Keyboard matrix sense input 1
81 SENSE2 I Keyboard matrix sense input 2
82 SENSE3 I Keyboard matrix sense input 3
84 SENSE4 I Keyboard matrix sense input 4
85 SENSE5 I Keyboard matrix sense input 5
87 SENSE6 I Keyboard matrix sense input 6
88 SENSE7 I Keyboard matrix sense input 7
90 SENSE8 I Keyboard matrix sense input 8
91 PWRENB1# O Power enable for downstream port 1
93 PWRENB2# O Power enable for downstream port 2
94 OVCUR1# I Over current flag for downstream port1
96 OVCUR2# I Over current flag for downstream port2
97 XTAL2 O Ceramic resonator or crystal out
99 XTAL1 I Ceramic resonator or crystal in
Note 1: “#” means low active
Table 1 GL651USB Pin Definitions and Descriptions
U?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
100
99NC98
NC
XTAL1
NC
NC
GND
NC
DM2
NC
DP2
NC
DM0
NC
DP0
NC
VCP
NC
DM1
NC
DP1
NC
VDD
NC
NUMLOCK
NC
CAPSLOCK
NC
SCLOCK
NC
TEST
NC
DRV1
NC
DRV231DRV3
32NC33
97
96NC95
XTAL2
OVCR2
DRV434DRV5
35NC36
94
93NC92
OVCR1
PWRENB2
GL651USB
DRV637DRV7
38NC39
91
90NC89
87NC86
SENSE8
SENSE788SENSE6
PWRENB1
DRV1043DRV1144NC45DRV1246DRV1347NC48DRV1449DRV15
DRV840DRV9
41NC42
84NC83
81
SENSE585SENSE4
SENSE382SENSE2
50
NC
SENSE1
SELF
NC
RESET
GPIO3
NC
GPIO4
GPIO5
NC
VDD
NC
GPIO6
NC
GPIO7
NC
SUSPND
NC
DRV20
NC
DRV19
NC
DRV18
NC
DRV17
NC
DRV16
NC
GND
NC
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
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PORT
PORT
Clock 12 mhz
Clock48 mhz
KEY
drive
sense
D+
D-
D+
D+
D-
D-
GL651USB USB KEYBOARD HUB CONTROLLER
4 Functional description
PC HOST
HUB REPEATER
CONTROLLER
DOWN PORT1 DOWN PORT2
CONTROLLER
KMIF
uC
MATRIX
PLL
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GL651USB USB KEYBOARD HUB CONTROLLER
TRANSCIVER: TRANSCIVER is the analog circuits, which takes care of the electrical
characteristics of USB.
SIE: SIE is the serial interface engine. The main responsibility of SIE is to
code/decode USB protocol. SIE guarantee the GL651USB always
function in a correct state.
KMIF: KMIF is the interface of key matrix and GL651USB. KMIF drives the
key matrix and sense the input. The sensed data is then output to the
registers, which provide the uC to judge the pressed key.
REGISTERS: REGISTERS is the interface of hardware and software. The used
registers will be listed in the later section.
REPEATER: REPEATER is the kernel of hub. It repeats the data accurately from the
upstream port to the downstream port, and vice versa.
PORT CONTROLLER: Each downstream port of hub needs a PORT CONTROLLER
respectively. It monitors the state of the port.
PLL: PLL extracts 48 Mhz clock from input 12 Mhz clock. This 48 Mhz
clock is used to generate USB clock in the digital PLL circuit.
5 REGISTER SUMMARY
MNEMONIC OFFSET DESCRIPTION
DEVCTL 00h Device control register
EVTFLG_1 01h USB function interrupt flag
EVTFLG_2 02h USB function interrupt flag
RXCTL0_HB 03h Endpoint 0 RX control of hub
RXCTL0_KB 04h Endpoint 0 RX control of keyboard
TXCTL0_HB 05h Endpoint 0 TX control of hub
TXCTL0_KB 06h Endpoint 0 TX control of keyboard
TXCTL123 07h Endpoint 1,2, and 3 TX control
FFDAT0_HB 08h Data buffer (FIFO) for endpoint 0 of hub
FFDAT0_KB 09h Data buffer (FIFO) for endpoint 0 of keyboard
FFDAT123 0Ah Data buffer (FIFO) for endpoint 1, 2, and 3
BUFCTL 0Bh Data buffer control register
DRVSEL 0Ch DRV1 ~ DRV18 select
SENSE 0Dh SENSE1 ~ SENSE8 input
ENDP_PORT_SEL 0Eh Endpoint selected and hub port to be configured
HUB_STAT_CHG 0Fh Hub status and status change indicator
PORT_STATUS 10h Hub ports status indicator
BUS_PORT_DATA 11h Hub ports status change indicator
HOST_CMD 12h Host command to HUB
ENP2_IND 13h Hub interrupt indicator
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GL651USB USB KEYBOARD HUB CONTROLLER
LEDCTL 14h LED control flag
KBSTUS 15h Keyboard address and configuration status
REV 16h Chip revision
HUBSTUS 17h USB hub address and configuration status
MODSEL 18h Strapping mode register
R/O: read only
R/W: read / write
R/W1C: read / write “1” to clear
W/O: write only
DEVCTL ( offset 00, default = 00h )
R/W R/O R/W R/W R/W R/O R/W
USBRDY --
USBRDY : 0 - USB interface is not ready. The device drives USB with SE0.
GANG : 0 – Individual mode. 1 – gang mode.
RW_KB : remote wakeup ability enable for keyboard.
RW_HUB : remote wakeup ability enable for hub.
SFRAME : short frame option for test purpose
SELF : 0 - HUB is bus powered.
1 - HUB is self-powered.
PWRDN : power down mode
GANG
1 - USB interface is ready. The device stops driving USB with SE0.
After power -on reset, USBRDY is cleared and the device looks like
disconnected. Set USBRDY to ‘1’ to enable USB interface.
Set SFRAME to ‘1’ will shorten frame length to 1/15 ms. It is to shorten the
time required for test.
RW_KB RW_HUB SFRAME SELF PWRDN
In suspend state, firmware can set PWRDN to put the controller into power
down mode. In this mode, the embedded micro-controller and most internal
activities are frozen.
EVTFLG _1 ( offset 01, default = 00h )
R/W1C R/W1C R/W1C R/W1C R/W1C R/W1C R/W1C
--
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EP3TX EP2TX EP1TX EP0TXKB EP0TXHB
Interrupt event flag –
EP0RXHB : a SETUP or OUT transaction to endpoint 0 of hub is accepted
EP0RXKB : a SETUP or OUT transaction to endpoint 0 of keyboard is accepted
EP0TXHB : USB host controller accepts hub data transmitted via endpoint 0.
EP0TXKB : USB host controller accepts keyboard data transmitted via endpoint 0.
EPnTX : USB host controller accepts data transmitted via endpoint n
EP0RXKB
EP0RXHB
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GL651USB USB KEYBOARD HUB CONTROLLER
EVTFLG _2 ( offset 02, default = 00h )
R/W1C R/W1C R/W1C R/W1C R/W1C
-Interrupt event flag –
SUSPD : the controller goes into suspend state
WAKEUP : remote wakeup is detected when global suspended
USBRST : End of USB reset
SOF : SOF detected or generated by HUB timer.
C_LCPWR : POWER source change.
RXCTL0_HB ( offset 03, default = 40h )
R/W R/O R/O R/O R/O R/O R/O R/O
RXDIS RXSETUP RXOUT RXSEQ RXCNT3 RXCNT2 RXCNT1 RXCNT0
RXCTL0 of hub.
Status of endpoint 0 receiving –
RXCNT3~0 : EP0 received data byte count.
RXSEQ : 1 - The received data PID is DATA1
RXOUT : 1 - The received token PID is OUT.
RXSETUP : 1 - The received token PID is SETUP.
RXDIS : 0 - Endpoint 0 FIFO is empty and ready for data-packet receiving.
If RXDIS = 1, the device will not accept an OUT transaction addressed to it, and will respond
with a NAK to an error -free transaction. Hardware will automatically set RXDIS after a
successful receiving. After processing, the micro-controller should clear RXDIS to enable next
data-packet receiving or free FF0 for filling of the data to transmit. Note that a SETUP
transaction addressed to the device is always accepted even though RXDIS = 1.
RXCTL0_KB ( offset 04, default = 40h )
R/W R/O R/O R/O R/O R/O R/O R/O
RXDIS RXSETUP RXOUT RXSEQ RXCNT3 RXCNT2 RXCNT1 RXCNT0
RXCTL0 of keyboard. Definition of each bit is the same as RXCTL0_HB.
TXCTL0_HB ( offset 05, default = 00h )
R/W R/W R/W R/W R/W R/W R/W
-- EP0STL EP0OE EP0SEQ EP0CNT3 EP0CNT2 EP0CNT1 EP0CNT0
TXCTL0 of hub.
Endpoint 0 transmit setting –
EP0CNT3~0 : number of data bytes to transmit
EP0OE : enable data transmit
EP0SEQ : data packet type
EP0STL : set endpoint 0 stall
1 – EP0 will respond to USB host controller with STALL packet
EP0STL will be automatically cleared when a setup transaction is accepted.
After filling the data-to-transmit into FF0, the micro-controller should setup this register to
enable endpoint 0 data transmit. If EP0OE = 0, endpoint 0 will respond to a valid IN transaction
-- -- WAKEUP SUSPD USBRST SOF C_LCPWR
0 - The received data PID is DATA0
1 - Endpoint 0 FIFO is filled with data and will reject the new -coming data
packet.
1 – ready to transmit data packet
0 – not ready to transmit data packet (default)
0 –DATA0
1 –DATA1
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GL651USB USB KEYBOARD HUB CONTROLLER
with a NAK. EP0OE will be automatically cleared after a successful transmission, or when
endpoint 0 has incidentally accepted another SETUP or OUT transaction.
TXCTL0_KB ( offset 06, default = 00h )
R/W R/W R/W R/W R/W R/W R/W
-- EP0STL EP0OE EP0SEQ EP0CNT3 EP0CNT2 EP0CNT1 EP0CNT0
TXCTL0 of hub. Definition of each bit is the same as TXCTL0_HB.
TXCTL123 ( offset 07, default = 00h )
R/W R/W R/W R/W R/W R/W R/W
-- EPnSTL EPnOE EPnSEQ EPnCNT3 EPnCNT2 EpnCNT1 EpnCNT0
Endpoint n(1~3) transmit setting –
EPnCNT3~0 : number of data bytes to transmit.
EPnOE : enable data transmit
1 – ready to transmit data packet
0 – not ready to transmit data packet (default)
EPnSEQ : data packet type
0 –DATA0
1 –DATA1
EPnSTL : set endpoint n stall
1 – EPn will respond to USB host controller with STALL packet
0 – default
After preparing the data to transmit, the micro-controller should setup this register to enable
endpoint n data transmit. If EPnOE = 0, endpoint n will respond to a valid IN transaction with a
NAK. After a successful transmission, the device will automatically clear EPnOE. EPSEL1~3
must be set before settingTXCTL123.
FFDAT0_HB ( offset 08, default = 00h )
R/W R/W R/W R/W R/W R/W R/W R/W
FFD7 FFD6 FFD5 FFD4 FFD3 FFD2 FFD1 FFD0
FFDAT0 of hub.
Each FFDAT0 read/write will automatically increase the FIFO pointer, which is a 3-bit circular
counter, by 1. Writing FPRST0 with ‘1’ (in BUFCTL) will reset the pointer. Note that to fill
FFDAT0, RXDIS (in RXCTL0) must be first cleared.
FFDAT0_KB ( offset 09, default = 00h )
R/W R/W R/W R/W R/W R/W R/W R/W
FFD7 FFD6 FFD5 FFD4 FFD3 FFD2 FFD1 FFD0
FFDAT0 of hub. Definition of each bit is the same as FFDAT0_HB.
FFDAT123 ( offset 0A, default = 00h )
R/W R/W R/W R/W R/W R/W R/W R/W
FFD7 FFD6 FFD5 FFD4 FFD3 FFD2 FFD1 FFD0
Each FFDAT123 read/write will automatically increase the FIFO pointer, which is a 3-bit
circular counter, by 1. Writing FPRST1 with ‘1’ (in BUFCTL) will reset the pointer. E PSEL1~3
must be set before setting FFDAT123.
BUFCTL ( offset 0B)
R/W R/W
-- -- -- -- -- -- FPRST1 FPRST0
Data buffer control –
FPRST[1:0] : Reset FIFO pointer of FIFO 0~3.
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GL651USB USB KEYBOARD HUB CONTROLLER
Before FFRST[1:0] is used, ENDP[1~3] must have been set.
DRVSEL ( offset 0C)
R/W R/W R/W R/W R/W R/W R/W
-- INVDRV DRVOE DRV4 DRV3 DRV2 DRV1 DRV0
DRV[4:0] : Select one of DRV1 to DRV20 port to drive if DRVOE is set.
5’h00 ~ 5’h11 stand for DRV1 to DRV20.
NOTE: 5’h14 ~5’h1f are invalid.
DROVE : DRV[4:0] output enable. ONLY when DRVOE is set can DRV[4:0] drive
out.
INVDRV : Set this bit to drive all DRV1-20 to low except the selected drive pin
SENSE ( offset 0D, default = 00h )
R/O R/O R/O R/O R/O R/O R/O R/O
SENSE8 SENSE7 SENSE6 SENSE5 SENSE4 SENSE3 SENSE2 SENSE1
PORT_ENDP_SEL ( offset 0E, default = 00h )
R/W R/W R/W R/W R/W R/W
-- PORTSEL3 PORTSEL2 PORTSEL
1
Port under host command or Endpoint under host request
PORTSEL1 1’b1 – port 1 selected
PORTSEL2 1’b1 – port 2 selected
PORTSEL3 1’b1 – port 3 selected
EPSEL3 1’b1 – endpoint 3 is selected
EPSEL2 1’b1 – endpoint 2 is selected
EPSEL1 1’b1 – endpoint 1 is selected
Before FFDAT123 and TXCTL123 is used, EPSEL1~3 must have been set.
HUB_STAT_CHG ( offset 0F, default = 00h )
R/O R/O R/O R/O
LCPWR OVCUR -- -- -- -- C_LCPWR C_OVCUR
HUB status and status change
LCPWR : HUB local power status
1’b0 – local power good
1’b1 – local power lost
OVRCUR : HUB over current indicator
1’b0 – No over -current condition currently exists
1’b1 – A hub over -current condition exists
C_LCPWR : Local power status change
1’b0 – No change has occurred to local power status
1’b1 – local power status has changed
C_OVRCUR : HUB over current indicator change
1’b0 – No change has occurred to the over -current indicator
1’b1 – Hub over -current indicator has changed
PORT_STATUS ( offset 10, default = 00h )
R/O R/O R/O R/O R/O R/O R/O
PT_LOW_
SPD
Port status indicator:
PT_PWR -- PT_RST PT_OVCUR PT_SUS PT_EN PT_CON
-- EPSEL3 EPSEL2 EPSEL1
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GL651USB USB KEYBOARD HUB CONTROLLER
PT_LOW_SPD :1’b0 – full speed device connected, 1’b1 – low speed device
connected.
PT_PWR 1’b0 – port is in power off state, 1’b1 – port is not in power
off state
PT_RST :1’b0 – Reset signaling not asserted, 1b’1 – Reset signal ing
asserted
PT_OVCUR : 1’b0 – No over -current condition occurred on this port
1’b1 – An over -current condition exists on this port
PT_SUS : 1’b0 – port not suspended, 1’b1 – port suspended or
resuming
PT_EN : 1’b0 – port is disabled, 1’b1 – port is enabled
PT_CON : 1’b0 – No device is present, 1’b1 – A device is present on
this port
BUS_PORT_DATA ( offset 11, default = 00h )
R/O R/O R/O R/O R/O R/O R/O
VP VM -- C_PT_RST C_PT_
OVCUR
Bus state and Port status change indicator:
VP : VP state on the downstream port
VM : VM state on the downstream port
C_PT_RST : 1’b0 – No change, 1’b1 – Reset complete
C_PT_OVCUR : 1’b0 – No change has occurred to over-current indicator
: 1’b1 – over -current indicator has changed
C_PT_SUS : 1’b0 – No change, 1’b1: – Resume complete
C_PT_EN : Set to one when a port is disabled because of a Port_error
condition
C_PT_CON : 1’b0 – No change has occurred to current connect status
: 1’b1 – Current connect status has changed
HOST_CMD ( offset 12, default = 0Fh )
W/O W/O W/O W/O W/O W/O W/O W/O
HB_CMD3 HB_CMD2 HB_CMD1 HB_CMD0 PT_CMD3 PT_CMD2 PT_CMD1 PT_CMD0
Host command to the hub:
PT_CMD3~0 : 4’h0 –SetPortFeature(PORT_SUSPEND)
: 4’h1 –SetPortFeature(PORT_RESET)
: 4’h2 –SetPortFeature(PORT_POWER)
: 4’h3 –ClearPortFeature(PORT_ENABLE)
: 4’h4 –ClearPortFeature(PORT_SUSPEND)
: 4’h5 –ClearPortFeature(PORT_POWER)
: 4’h6 –ClearPortFeature(C_PORT_RESET)
: 4’h7 –ClearPortFeature(C_PORT_OVER_CURRENT)
: 4’h8 –ClearPortFeature(C_PORT_SUSPEND)
: 4’h9 –ClearPortFeature(C_PORT_ENABLE)
: 4’hA –ClearPortFeature(C_PORT_CONNECTION)
HB_CMD3 : 1’b1 –SetHubFeature(C_HUB_LOCAL_POWER)
HB_CMD2 : 1’b1 –SetHubFeature(C_HUB_OVER_CURRENT)
HB_CMD1 : 1’b1 –ClearHubFeature(C_HUB_LOCAL_POWER)
HB_CMD0 : 1’b1 –ClearHubFeature(C_HUB_OVER_CURRENT)
ENP2_IND ( offset 13, default = 00h )
R/O R/O R/O R/O
-- -- -- -- PT3 PT2 PT1 HUB
C_PT_
SUS
C_PT_EN C_PT_
CON
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GL651USB USB KEYBOARD HUB CONTROLLER
Endpoint2 (HUB) interrupt change indicator
LEDCTL ( offset 14, default = 00h )
R/W1C R/W1C R/W1C R/W1C
-- -- P2_ON P1_ON -- -- P2_TRX P1_TRX
Hub LED control flag:
P1_TRX : upstream traffic happens on downstream port 1
P2_TRX : upstream traffic happens on downstream port 2
P1_ON : if 1’b1, L ED is always on, otherwise, judge according to TRXFLAG
register.
P2_ON : if 1’b1, LED is always on, otherwise, judge according to TRXFLAG
register.
KBSTUS ( offset 15, default = 0Fh )
R/W R/W R/W R/W R/W R/W R/W R/W
KCONFIG KBADR6 KBADR5 KBADR4 KBADR3 KBADR2 KBADR1 KBADR0
Keyboard address and keyboard configuration.
REV ( offset 16, default = current revision )
R/O R/O R/O R/O R/O R/O R/O R/O
REV7 REV6 REV5 REV4 REV3 REV2 REV1 REV0
This register returns current silicon revision number of this device.
Current revision is 8’h11. (Revision 1.1)
HUBSTUS ( offset 17, default = 00h )
R/W R/W R/W R/W R/W R/W R/W R/W
HCONFIG DEVADR6 DEVADR5 DEVADR4 DEVADR3 DEVADR2 DEVADR1 DEVADR0
USB hub status registers. Procedure to set the device address:
1. After USB reset, the device responds to default address 0, and hub configuration = 0.
2. USB host controller issues SET_ADDRESS request to the device. (INTRB asserted)
3. Micro-controller recognizes the request, then set DEVADR register with appropriate value.
4. Micro-controller prepares the status stage of SET_ADDRESS request by programming
TXCTL0 register.
5. When the hub configuration value is not equal zero, HCONFIG is set to one.
USB reset will clear this register.
MODSEL (offset 18, default = 07h)
R/O R/O R/O R/O R/O R/O R/O R/O
MOD7 MOD6 MOD5 MOD4 MOD3 MOD2 MOD1 MOD0
MOD[7:0] is strapping value at initial state from GPIO[7:0]. GPIO[2:0] is default pull high for
keyboard LED control. F/W can utilize these bits for customization.
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GL651USB USB KEYBOARD HUB CONTROLLER
6 MAXIMUM RATINGS
Maximum ratings are the extreme limits to which the GL651USB can be exposed without permanently
damaging it. The GL651USB contains circuitry to protect the inputs against damage from high static
voltages; however, do not apply voltages higher than those shown in the tabl e. Keep VIN and V
the range GND ≤ (VIN or V
) ≤ VCC. Connect unused inputs to the appropriate voltage level, either GND
OUT
OUT
or VDD.
Symbol Characteristic Value Unit
T
Storage temperature -55 to +150
STG
TOP Operating temperature 0 to +70
°C
°C
VCC Supply voltage -0.5 to +7.0 V
VIN DC input voltage -0.5 to +V
+ 0.5 V
DD
I Maximum current per pin excluding VDD and VSS 25 mA
I
Maximum current out of GND 100 mA
MGND
I
Maximum current out of VCC 100 mA
MVCC
V
Static discharge voltage >4000 V
ESD
7 ELECTRICAL CHARACTERISTICS
Symbol Parameter Tese Conditions Min. Typ. Max. Unit
Supply
VDD Digital Power Supply 4.5 5.0 5.5 V
V
Analog Power Supply 4.5 5.0 5.5 V
DDA
IDD Digital Supply Current mA
I
Analog Supply Current mA
DDA
USB Bus: DP and DM
VCP Regulated Voltage Output 3.0 3.3 3.6 V
VDI Static Input Voltage 0 - VCP V
VDO Static Output Voltage 0 - VCP V
Digital I/O Pins
VIL Input Logic Low Voltage - - 0.8 V
VIH Input Logic High Voltage 2.0 - - V
VOL Output Logic Low V oltage IO=-4.0mA - - 0.1xVDD V
VOH Output Logic High Voltage IO=+4.0mA 0.9xVDD - - V
within
14 03/06/00
Version 1.0
Page 15
A
8. Application Circuit
Y1
12 MHz
C1
4 4
3 3
30P
C3
4.7U
VCP
B_VCC
C5
0.1U
DM2
DP2
DM0
DP0
DM1
DP1
NUMLOCK
CAPSLOCK
SCLOCK
DRV1
C2
30P
U1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
XTAL1DRV3
100999897969594939291908988878685848382
NC
XTAL1NCXTAL2
NC
NC
GND
NC
DM2
NC
DP2
NC
DM0
NC
DP0
NC
VCP
NC
DM1
NC
DP1
NC
VDD
NC
NUMLOCK
NC
CAPSLOCK
NC
SCLOCK
NC
TEST
NC
DRV1
NC
DRV2
DRV3NCDRV4
31323334353637383940414243444546474849
XTAL2
OVRCUR1#
OVRCUR2#
OVCR2NCOVCR1
GL651USB
DRV5NCDRV6
B
PWRENB1#
PWRENB2#
SENSE8
SENSE8NCSENSE7
PWRENB2NCPWRENB1
DRV7NCDRV8
DRV9NCDRV10
SENSE6
SENSE7
SENSE6NCSENSE5
DRV11NCDRV12
SENSE5
SENSE4
SENSE4NCSENSE3
DRV13NCDRV14
SENSE3
SENSE2
81
SENSE2
SENSE1
SUSPND
DRV15
50
SELF
RESET
GPIO3
GPIO4
GPIO5
VDD
GPIO6
GPIO7
DRV20
DRV19
DRV18
DRV17
DRV16
GND
C
80
NC
SENSE1
79
SELF
78
77
NC
76
GPIO3
75
74
NC
73
72
71
NC
70
69
NC
68
67
NC
66
65
NC
SUSPND
64
63
NC
62
61
NC
60
59
NC
58
57
NC
56
55
NC
54
53
NC
52
51
NC
GPIO4
GPIO5
GPIO6
GPIO7
DRV20
DRV19
DRV18
DRV17
DRV16
B_VCC
C4
0.1U
1 GPIO3~GPIO7 are for customization usage. Different
strap combinations can make different code options.
2.GPIO6~GPIO7 can be used as hub LED indication also.
3.For individual mode hub, SUSPND should be pulled low.
For ganged mode hub, SUSPND should be pulled up.
DRV1
DRV1
DRV2
DRV2
D
DRV3
DRV3
DRV4
DRV4
DRV5
DRV5
DRV6
DRV6
DRV7
DRV7
DRV8
DRV8
DRV9
DRV9
DRV10
DRV11
DRV10
DRV12
DRV11
DRV12
DRV13
DRV14
DRV13
DRV15
DRV16
DRV14
DRV15
DRV17
DRV16
DRV17
DRV18
DRV19
DRV18
DRV20
DRV19
DRV20
KEYBOARD
MATRIX
SENSE1
SENSE2
SENSE3
SENSE4
SENSE5
SENSE6
SENSE7
SENSE8
SENSE1
SENSE2
SENSE3
SENSE4
SENSE5
SENSE6
SENSE7
SENSE8
E
DRV10
DRV11
DRV12
DRV15
DRV7
DRV4
DRV2
2 2
DRV5
DRV6
DRV8
DRV9
DRV13
DRV14
B_VCC
Description
1. First Product Release '00/03/03
1.0
1. ADD Q4 to prevent current leakage when adapter is plugged in but USB
1.1
cable isn't.
Title
GENESYS USB KEYBOARD HUB
Size Document Number Rev
KBHUB.DSN 1.1
B
D
Date: Sheet of
E
A
D1 LED R1 1K
D2 LED
D3 LED
D4 LED
D5 LED
R9 1K
R10 1K
R17 1K
R2
1M, NIR8 1K
R11
1M
R3
1M, NI
GPIO4SUSPND GPIO7GPIO6
R12
1M
B
R4
1M, NI
R13
1M
R5
1M, NI
GPIO5GPIO3
R14
1M
R6
1M, NI
R15
1M
C
R7
1M, NI
R16
1M
NUMLOCK
CAPSLOCK
SCLOCK
1 1
GPIO6
GPIO7
DateRev.
'00/03/16
1 2Thursday, March 16, 2000
Page 16
A
B
C
D
E
VCC
B_VCC B_VCC
VCP B_VCC
C10
47P
R20
1.5K
47P
C11
R23
R2422
22
4 4
DM0
DP0
L1 FB
L2 FB
C7 10U
+
J1
1
2
3
4
USB-B
PWRENB1#
FLG1#
FLG2#
PWRENB2#
U2
1
ENA#
OUTA#
2
FLGA#
3
FLGB#
4 5
ENB# OUTB#
MIC2526-8
IN
GND
VOUT1
8
7
6
VOUT2
C6
0.1U
FLG1# FLG2#
R18
10K
R21 10K R22 10K
C8
0.22U
R19
10K
C9
0.22U
OVRCUR2#OVRCUR1#
3 3
2 2
VOUT1
+
C12
100U
L3 FB
L4 FB
C13
0.1U
DM1
DP1
R26 22
R27 22
R30
15K
R31
15K
J2
1
2
3
4
USB-A
VCC
B_VCC
R28
NI (0)
Q1
FDN360P
R25
1M
G
DS
D S
Q3
2N7002
G
Q2
TP0610T
R32 10K
R33
1M
G
Q4
2N7002
D S
R36 1M
R37
510K
S_VCC
U3
C15
47U
MIC 29302
12345
R34 56.2K,%1 C17
R35
C16
0.1U
VCC
VCC
47U
D6
1N400X
G
R29
D S
4.7K
CON1
1
2
3
POWERJACK
S_VCC
C14
0.1U
18K,%1
SELF
L5 FB
VOUT2
+
C19
100U
L6 FB
C20
0.1U
DM2
DP2
R39 22
R40 22
R41
15K
1 1
A
R42
15K
J3
1
2
3
4
USB-A
B
R38
NI (10K)
1 For pure bus-powered keyboard hub, please DO NOT implement
those components in the dotted line, and mount R28 with
0 Ohm and R38 with 10K.
2.For self-bus powered auto-switching keyboard hub, please
remove R28, R38 and implement those components in dotted line.
C
C18
0.1U
Title
GENESYS USB KEYBOARD HUB
Size Document Number Rev
KBHUB.DSN 1.1
B
D
Date: Sheet of
2 2Thursday, March 16, 2000
E
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