Page 1
Genesys Logic, Inc.
GL650USB
Genesys Logic, Inc.
USB 4 PORT HUB CONTROLLER
DATA SHEET, Version 1.2
Aug. 18, 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
Page 2
GL650USB 4 PORT USB HUB CONTROLLER
1 FEATURES
• High performance and low-cost solution for USB hub
• USB Specification Compliance
− Conforms to USB specification Rev. 1.1
− Supports 1 device address and 2 endpoints
• 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
− 4-port hub
• Internal memory
− 64 bytes of RAM
− 1.75K × 14 of program ROM
• 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
• Support power management for downstream port devices
• Automatic switching between self/bus powered mode
• Smart LED traffic indicator
− The higher data traffic flows through one port, the higher frequency that port’s
LED will blink.
• Applications:
− Stand-alone USB hub
− PC motherboard USB hub
• 48 pin LQFP package
2 08/18/00
Revision 1.2
Page 3
GL650USB 4 PORT USB HUB CONTROLLER
2 FUNCTION OVERVIEW
The GLI650USB is a 5 port USB hub with 1 upstream port and 4 downstream ports. It
uses an 8-bit RISC-like uC to encode/decode the host commands. The GL650USB is
designed mainly for stand -alone hub and can also be integrated in PC motherboard or any
other devices to support USB hub function. The GL650USB can switch between selfpower and bus-power automatically without re-plug in. The GL650USB can be
configured as individual mode or ganged mode for the power management of
downstream port devices. To prevent from abnormal current consumption of downstream
port devices, the GL650USB supplies power enable flags by reading the over-current
flags. The GL650USB supports smart traffic indication through the LED lighting. The
higher data traffic flows through one port, the higher frequency of that port’s LED blinks.
To minimize the power consumption, the GL650USB will turn LED off and stop the
clock when they are suspended.
3 PIN DEFINITIONS AND DESCRIPTIONS
l GL650USB
Pin No. Name I/O Description
1 DP0 I/O Upstream port USB data+
2 DM0 I/O Upstream port USB data3 AGND - Analog ground
4 NC - 15K resister pull low
5 NC - 15K resister pull low
6 DP1 I/O Downstream port 1 USB data+
7 DM1 I/O Downstream port 1 USB data8 NC - 15K resister pull low
9 NC - 15K resister pull low
10 DP4 I/O Downstream port 4 USB data+
11 DM4 I/O Downstream port 4 USB data12 AVCC - Analog VCC(5V)
13 DP2 I/O Downstream port 2 USB data+
14 DM2 I/O Downstream port 2 USB data15 VCP - 3.3V output
16 NC - 15K resister pull low
17 NC - 15K resister pull low
18 DP3 I/O Downstream port 3 USB data+
19 DM3 I/O Downstream port 3 USB data20 SUSPND O Suspend indication output
21 SELF I 1: SELF-powered. 0: INDIVIDUAL-powered
22 LED1 O LED traffic indicator for downstream port 1
23 LED2 O LED traffic indicator for downstream port 2
24 LED3 O LED traffic indicator for downstream port 3
25 RESET I Reset input
26 LED4 O LED traffic indicator for downstream port 4
27 OVCUR4# I Over current flag for downstream port4
28 NC - 29 PWRENB4# O Power enable for downstream port 4
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Revision 1.2
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GL650USB 4 PORT USB HUB CONTROLLER
30 NC - 31 NC - 32 TEST I Test mode input
33 NC - 34 XTAL2 O Ceramic resonator or crystal out
35 XTAL1 I Ceramic resonator or crystal in
36 DGND - Digital ground
37 PWRENB3# O Power enable for downstream port 3
38 OVCUR3# I Over current flag for downstream port3
39 NC - 40 NC - 41 DVCC - Digital VCC(5V)
42 NC - 43 NC - 44 PWRENB2# O Power enable for downstream port 2
45 NC - 46 OVCUR2# I Over current flag for downstream port2
47 PWRENB1# O Power enable for downstream port 1
48 OVCUR1# I Over current flag for downstream port1
Note 1: “#” means low active
Note 2: If using crystal, TEST pull low. If using oscillator, TEST pull high.
Table 1 GL650USB Pin Definitions and Descriptions
NC
NC
NC
NC
DP0
DM0
AGND
NC
NC
DP1
DM1
NC
NC
DP4
DM4
AVCC
OVRCUR1#
NC
OVRCUR2#
PWRENB1#
PWRENB2#
DVCC
DGND
PWRENB3#
OVRCUR3#
XTAL1
XTAL2
TEST
PWRENB4#
OVRCUR4#
LED4
RESET
NC
NC
NC
NC
DP2
GL650USB-AGL650USB
4 08/18/00
DM2
VCP
NC
NC
DP3
DM3
SELF
SUSPND
LED1
LED2
LED3
Revision 1.2
Page 5
GL650USB 4 PORT USB HUB CONTROLLER
TRANSCEIVER
D+
D-
SIE
PLL
PORT CON-
TRANS-
DOWNSTREAM
D+
LED
DOWNSTREAM
PORT CON-
TRANSCEIVER
D-
LED
4 BLOCK DIAGRAM
UPSTREAM
PORT
TROLLER
CEIVER
D-
PORT 1
HUB REPEATER
12 MHz
TROLLER
D+
PORT 4
Registers
Controller
ROM
Micro-
RAM
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Revision 1.2
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GL650USB 4 PORT USB HUB CONTROLLER
5 REGISTER SUMMARY
MNEMONIC OFFSET DESCRIPTION
DEVCTL 00h Device control register
EVTFLG 01h USB function interrupt flag
RXCTL0 02h Endpoint 0 RX control
TXCTL0 03h Endpoint 0 TX control
TXCTL1 04h Endpoint 1 TX control
FFDAT 05h Data buffer (FIFO) I/O port
BUFCTL 06h Data buffer control register
PORTSEL 07h Hub port to be configured
HUB_STAT_CHG 08h Hub status and status change indicator
PORT_STATUS 09h Hub ports status indicator
BUS_PORT_DATA 0Ah Hub ports status change indicator
HOST_CMD 0Bh Host command to downstream ports
ENP1_IND 0Ch Endpoint 1 indicator
TRXFLAG 0Dh Downstream port traffic flag
LED_INIT 0Eh LED initial state
GPIOD 0Fh General purpose I/O pin status
REV 10h Chip revision
DEVSTUS 11h USB device address and configuration status
Register Description
Terminology:
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/W R/W R/O R/O
USBRDY SFRAME
USBRDY : 0 - USB interface is not ready. The device drives USB with SE0.
SFRAME : short frame option for test purpose
PWRDN : power down mode
PWRDN
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.
-- -- -- SELF GANG
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. Hardware will automatically clear PWRDN upon
hardware reset or resume activities occur .
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GL650USB 4 PORT USB HUB CONTROLLER
SELF : 0 - HUB is bus powered.
1 - HUB is self powered.
GANG : 0 - HUB is in individual mode.
1 - HUB is in ganged mode.
EVTFLG ( offset 01, default = 00h )
R/W1C R/W1C R/W1C R/W1C R/W1C R/W1C R/W1C R/W1C
USBRST
Interrupt event flag –
EP0RX : a SETUP or OUT transaction to endpoint 0 is accepted
EP0TX : USB host controller accepts data transmitted via endpoint 0.
EP1TX : USB host controller accepts data transmitted via endpoint 1
SUSPD : the controller goes into suspend state
WAKEUP : remote wakeup is detected when global suspended
SOF : SOF detected or generated by HUB timer.
C_LCPWR : POWER source change.
USBRST : End of USB reset
RXCTL0 ( offset 02, 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
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.
RXSE TUP : 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.
TXCTL0 ( offset 03, default = 00h )
R/W R/W R/W R/W R/W R/W R/W
-- EP0STL EP0OE EP0SEQ EP0CNT3 EP0CNT2 EP0CNT1 EP0CNT0
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.
SOF C_LCPWR WAKEUP SUSPD EP1TX EP0TX EP0RX
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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GL650USB 4 PORT USB HUB CONTROLLER
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
with a NAK. EP0OE will be automatically cleared after a successful transmission, or when
endpoint 0 has incidentally accepted another SETUP or OUT transaction.
TXCTL1 ( offset 04, default = 00h )
R/W R/W R/W R/O R/O R/O R/W
-- EP1STL EP1OE EP1SEQ EP1CNT3 EP1CNT2 EP1CNT1 EP1CNT0
Endpoint 1 transmit setting –
EP1CNT3~0 : number of data bytes to transmit. EP1CNT3~1 are always ‘0’.
EP1OE : enable data transmit
1 – ready to transmit data packet
0 – not ready to transmit data packet (default)
EP1SEQ : data packet type
0 –DATA0
1 –DATA1
EP1STL : set endpoint 1 stall
1 – EP1 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 1 data transmit. If EP1OE = 0, endpoint 1 will respond to a valid IN transaction with a
NAK. After a successful transmission, the device will automatically clear EP1OE.
FFDAT ( offset 05, 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
If FFSEL1 (in BUFCTL) = 1’b0, this is FF0 access-window; if FFSEL1 = 1’b1, this is FF1
access-window. Each FFDAT read/write will automatically increase the FIFO pointer, which is
a 3-bit circular counter, by 1. Writing FPRST with ‘1’ (in BUFCTL) will reset the pointer. Note
that to fill FF0, RXDIS (in RXCTL0) must be first cleared.
BUFCTL ( offset 06 )
W/O R/W
-- -- -- -- -- FPRST -- FFSEL1
Data buffer control –
FFSEL1 : FIFO 0/1 selector
1’b0 – select endpoint 0 data buffer
1’b1 – select endpoint 1 data buffer
FPRST : reset FIFO 0/1 pointer (write only)
PORTSEL ( offset 07, default = 00h )
R/W R/W R/W R/W R/W R/W R/W
-- - - - PORTSEL4 PORTSEL3 PORTSEL2 PORTSEL
PORTSEL : PORT 1~7 under request
PORTSEL1 1’b1 – port 1 selected
PORTSEL2 1’b1 – port 2 selected
PORTSEL3 1’b1 – port 3 selected
PORTSEL4 1’b1 – port 4 selected
1
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GL650USB 4 PORT USB HUB CONTROLLER
HUB_STAT_CHG ( offset 08, 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 09, default = 00h )
R/O R/O R/O R/O R/O R/O R/O
PT_LOW_
SPD
Port status indicator:
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 signaling 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 0A, default = 00h )
R/O R/O R/O R/O R/O R/O R/O
VP VM -- C_PT_RST C_PT_
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
PT_PWR -- PT_RST PT_OVCUR PT_SUS PT_EN PT_CON
OVCUR
C_PT_
SUS
C_PT_EN C_PT_
CON
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GL650USB 4 PORT USB HUB CONTROLLER
HOST_CMD ( offset 0B, 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)
ENP1_IND ( offset 0C, default = 00h )
R/O R/O R/O R/O R/O R/O R/O R/O
- - - PT4 PT3 PT2 PT1 HUB
Endpoint 1 interrupt change indicator
TRXFLAG ( offset 0D, default = 00h )
R/W1C R/W1C R/W1C R/W1C R/W1C R/W1C R/W1C
-- - - - P4_TRX P3_TRX P2_TRX P1_TRX
Upstream traffic flag:
P1_TRX : upstream traffic happens on downstream port 1
P2_TRX : upstream traffic happens on downstream port 2
P3_TRX : upstream traffic happens on downstream port 3
P4_TRX : upstream traffic happens on downstream port 4
LED_INIT ( offset 0E, default = 00h )
R/W1C R/W1C R/W1C R/W1C R/W1C R/W1C R/W1C
-- - - - P4_ON P3_ON P2_ON P1_ON
LED initial flag:
P1_ON : if 1’b1, LED is always on, otherwise, judge according to TRXFLAG
register.
P2_ON : if 1’b1, LED is always on, otherwise, judge according to TRXFLAG
register.
P3_ON : if 1’b1, LED is always on, otherwise, judge according to TRXFLAG
register.
P4_ON : if 1’b1, LED is always on, otherwise, judge according to TRXFLAG
register.
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GL650USB 4 PORT USB HUB CONTROLLER
GPIOD (offset 0F, default = 0Fh)
R/W R/W R/W R/W R/W R/W R/W
GPIO3D/
LED4#
GPIO2D/
LED3#
GPIO1D/
LED2#
GPIO0D/
LED1#
General purpose I/O pin status –
If GPIOXOE = 1 (X: 0 ~ 3), GPIOX is driven with the level of internal GPIOXD latch, which
is the same as corresponding GPIOXD bit. If GPIOXOE = 0, GPIOXD reflects the level of
GPIOX pin, which may be different from internal GPIOXD latch. The value written to GPIOD
will be stored in an internal latch, no matter what direction the GPIOX pins are in. Bits 3 to 0
have been pre-assigned specific functions for LED indicators. (active low).
REV ( offset 10, 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 the HUB.
Current revision is 8’h11. (Revision 1.1)
DEVSTUS ( offset 11, 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 device 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.
6 MAXIMUM RATINGS
Maximum ratings are the extreme limits to which the GL650USB/GL650USB-A can be exposed without
permanently damaging it. The GL650USB/GL650USB-A contain circuitry to protect the inputs against
damage from high static voltages; however, do not apply voltages higher than those shown in the table.
Keep VIN and V
voltage level, either GND or VDD.
Symbol Characteristic Value Unit
T
Storage temperature -55 to +150
STG
TOP Operating temperature 0 to +70
VCC Supply voltage -0.5 to +7.0 V
VIN DC input voltage -0.5 to +V
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
within the range GND ≤ (VIN or V
OUT
) ≤ VCC. Connect unused inputs to the appropriate
OUT
°C
°C
+ 0.5 V
DD
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GL650USB 4 PORT USB HUB CONTROLLER
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 Voltage IO=-4.0mA - - 0.1xVDD V
VOH Output Logic High Voltage IO=+4.0mA 0.9xVDD - - V
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GL650USB 4 PORT USB HUB CONTROLLER
8 PACKAGE DIAGRAM
SYVBOIS MIN MAX
A 1.6
A1 0.05 0.15
A2 1.35 1.45
C1 0.09 0.16
D 9.00BSC
D1 7.00BSC
E 9.00BSC
E1 7.00BSC
48-LQFP
e 0.5BSC
b 0.17 0.27
L 0.45 0.75
L1 1 REF
D
D1
E1
E
b
e
0.25
L
L1
A1
13 08/18/00
C1
A2
A
Revision 1.2
Page 14
A
9. Application Circuit (1)
4 4
B
C
D
E
B_VCC
C1
0.1U
DP0
1
DM0
2
3
3 3
4
5
DP1
6
DM1
7
8
9
DP4
10
DM4
B_VCC
11
12
C4
0.1U
+
C5
2 2
C6
0.1U
4.7U
PWRENB1#
OVRCUR1#
U1
4847464544434241403938
DP0
OVRCUR1#
DM0
AGND
NC
NC
DP1
DM1
NC
NC
DP4
DM4
AVCC
DP2
1314151617181920212223
DP2
DM2
GL650USB
OVRCUR2#
OVRCUR2#
PWRENB1#
DM2
VCPNCNC
VCP
PWRENB2#
NC
NC
PWRENB2#
DP3
DP3
DM3
NC
DM3
DVCC
SUSPND
SELF
SUSPEND
NC
SELF
NC
LED1
LED1
PWRENB3#
OVRCUR3#
37
DGND
OVRCUR3#
PWRENB3#
XTAL1
XTAL2
TEST
PWRENB4#
OVRCUR4#
LED4
RESET
LED2
LED3
24
LED2
LED3
NC
NC
NC
NC
R8 1M
C2
30P
36
35
34
33
32
31
30
29
28
27
26
25
R1 1M
Y1 12 MHz
XTAL1
R2 24
PWRENB4#
OVRCUR4#
LED4
R7 10K
C3
30P
B_VCC
B_VCC
LED1
LED2
LED3
LED4
D1
LED
D2
LED
D3
LED
D4
LED
R3 1K
R4 1K
R5 1K
R6 1K
VOUT1
VOUT2
VOUT3
VOUT4
1 1
Title
CIRCUIT FOR GENESYS 4-PORT USB HUB
Size Document Number Rev
USBHUB.DSN 1.2
B
A
B
C
D
Date: Sheet of
1 3Thursday, August 17, 2000
E
Page 15
A
9. Application Circuit (2)
B
C
D
E
VCP B_VCC
4 4
VOUT1
R9
1.5K
DM0
DP0
C8
47P
R10 22
R11 22
C9
47P
L3 FB
C10
+
120U
C11
0.1U
L4 FB
3 3
L5 FB
VOUT2
C15
+
120U
C16
0.1U
L6 FB
L7 FB
2 2
VOUT3
C18
+
120U
C21
0.1U
L8 FB
C7 10U
+
L1 FB
L2 FB
DM1
R17 22
DP1
R18 22
DM2
R23 22
DP2
R24 22
DM3
R31 22
DP3
R32 22
J1
1
2
3
4
USB-B
J2
1
2
3
4
R20
15K
R25
15K
R33
15K
USB-A
R21
15K
J4
1
2
3
4
USB-A
R26
15K
J5
1
2
3
4
USB-A
R34
15K
S_VCC
B_VCC
G
R13
1M
J3
POWER JACK
A 6V adapter is
recommended.
PWRENB1#
FLG1#
FLG2#
PWRENB2#
R12
4.7K
G
DS
Q1
Q2
TP0610T
D S
2N7002
R15
4.7K
U3
1
ENA#
2
FLGA#
3
FLGB#
4 5
ENB# OUTB#
MIC2526-8
OUTA#
VCC
C12
0.1U
REN
S_VCC
MIC 29302
U2
C13
47U
12345
R19 825K,%1
R22
VCC
VCC
B_VCC
C14
0.1U
Q3
FDN340P
D S
SELF
G
R16
Q4
DS
2N7002
1M
R14
470
DS
REN
Q5
2N7002
G
G
267K,%1
VCC
VOUT1
8
7
IN
6
GND
VOUT2
0.1U
C17
B_VCC
R27
10K
R29 10K
OVRCUR1#
C19
0.1U
B_VCC
R28
10K
FLG2#FLG1#
R30 10K
C20
0.1U
OVRCUR2#
VCC
L9 FB
VOUT4
C23
+
120U
L10 FB
1 1
A
DM4
R37 22
DP4
C24
R38 22
0.1U
R41
15K
J6
1
2
3
4
USB-A
R42
15K
B
PWRENB3#
FLG3#
FLG4#
PWRENB4#
U4
1
ENA#
OUTA#
2
FLGA#
FLGB#
ENB# OUTB#
MIC2526-8
IN
GND
3
4 5
VOUT3
8
7
6
VOUT4
C
C22
0.1U
B_VCC B_VCC
R35
10K
R39 10K
OVRCUR3# OVRCUR4#
C25
0.1U
FLG4#FLG3#
Title
Size Document Number Rev
Custom
D
Date: Sheet of
R36
10K
C26
R40 10K
0.1U
CIRCUIT FOR GENESYS 4-PORT USB HUB
USBHUB.DSN 1.2
2 3Thursday, August 17, 2000
E
Page 16
A
9. Application Circuit (3)
4 4
B
C
D
E
Description
1. First Product Release '00/04/05
1.0
1. Seperate 4-port and 7-port hubs into different schematic files.1.1
2. Omit the ganged mode pull-up resistor on 'SUSPND' pin.
3. Add a 10K pull-up resistor to 'RESET' pin.
4. Connect pin 1 of U2 to B_VCC, then regulator will be enabled
only when upstream port is plugged!
A 1M pull-low resistor is also added to disable this pin when
the upstream port is not plugged.
5. 'SELF' is directly connected to drain of Q4 to omit the external
3 3
2 2
debounce RC circuit for this pin.
6. Q1 is replaced by a more popular and cheaper one -- FDN340P.
7. Some resistor values are increased to save the operating current.
1.2 1. Change the pull-up voltage source for each LED from B_VCC to power
switch output.
2. Remove the 47U output capacitor of MIC29302 to suppress inrush current.
3. Add R1, R2 and C6 for EMI suppressing.
4. Change C10, C15, C18 and C23 from 100U to 120U for better behavior in
droop test.
5. Add a 2-transistor circuit for regulator ENABLE pin. That will save
several tens of mA operating current than direct connecting B_VCC
to ENABLE pin.
6. Remove a redudant transistor in SELF-BUS power switching circuit.
DateRev.
'00/05/18
'00/08/17
1 1
Title
CIRCUIT FOR GENESYS 4-PORT USB HUB
Size Document Number Rev
USBHUB.DSN 1.2
B
A
B
C
D
Date: Sheet of
3 3Thursday, August 17, 2000
E
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