GENESYS GL652USB Datasheet

Genesys Logic, Inc.

GL652USB

Genesys Logic, Inc.

USB 7 PORT HUB CONTROLLER

DATA SHEET, Version 1.2

Aug. 18, 2000

10F, No.11, Ln.3, Tsao Ti Wei, Shenkeng, Taipei, Taiwan
Tel: [phone] Fax: [phone]

http://www.genesyslogic.com

GL652USB 7 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

− 7-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

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GL652USB 7 PORT USB HUB CONTROLLER

2 FUNCTION OVERVIEW

The GL652USB is an 8 port USB hub with 1 upstream port and 7 downstream ports. It
uses an 8-bit RISC-like uC to encode/decode the host commands. The GL652USB 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 GL652USB can switch between self­power and bus-power automatically without re-plug in. The GL652USB 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 GL652USB supplies power enable flags by reading the over-current
flags. The GL652USB 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 GL652USB will turn LED off and stop the
clock when they are suspended.

3 PIN DEFINITIONS AND DESCRIPTIONS

l GL652USB

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 DP7 I/O Downstream port 7 USB data+
5 DM7 I/O Downstream port 7 USB data­6 DP1 I/O Downstream port 1 USB data+
7 DM1 I/O Downstream port 1 USB data­8 DP6 I/O Downstream port 6 USB data+

9 DM6 I/O Downstream port 6 USB data­10 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 DP5 I/O Downstream port 5 USB data+
17 DM5 I/O Downstream port 5 USB data­18 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 LED5 O LED traffic indicator for downstream port 5

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GL652USB 7 PORT USB HUB CONTROLLER

29 PWRENB4# O Power enable for downstream port 4
30 LED6 O LED traffic indicator for downstream port 6
31 PWRENB6# O Power enable for dow nstream port 6
32 TEST I Test mode input
33 OVCUR6# I Over current flag for downstream port6
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 por t 3
38 OVCUR3# I Over current flag for downstream port3
39 LED7 O LED traffic indicator for downstream port 7
40 OVCUR7# I Over current flag for downstream port7
41 DVCC - Digital VCC(5V)
42 OVCUR5# I Over current flag for downstream port5
43 PWRENB5# O Power enable for downstream port 5
44 PWRENB2# O Power enable for downstream port 2
45 PWRENB7# O Power enable for downstream port 7
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 GL652USB Pin Definitions and Descriptions

GL652USB

GL650USB

48

47

46

45

44

43

42

41

40

39

38

1

DP0

2

DM0

3

AGND

4

DP7

5

DM7

6

DP1

7

DM1

8

DP6

9

DM6

10

DP4

11

DM4

12

AVCC

OVRCUR1#

PWRENB1#

OVRCUR2#

PWRENB7#

PWRENB2#

PWRENB5#

DVCC

OVRCUR5#

LED7

OVRCUR7#

OVRCUR3#

OVRCUR6#

PWRENB6#

PWRENB4#

OVRCUR4#

37

DGND

PWRENB3#

XTAL1
XTAL2

TEST

LED6

LED5

LED4

RESET

36
35
34
33
32
31
30
29
28
27
26
25

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13

DP2

DM214VCP

15

16

DP5

17

DM5

DP3

DM319SUSPND20SELF21LED122LED223LED3

18

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Revision 1.2

GL652USB 7 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 7

Registers

Controller

ROM

Micro-

RAM

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GL652USB 7 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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Revision 1.2