GL850G View Datasheet(PDF) - Genesys Logic

Part Name

Description

Manufacturer

GL850G

USB 2.0 HUB Controller

Genesys Logic 

GL850G USB 2.0 Low-Power HUB Controller

Note: 1. VID_H/VID_L: high/low byte of VID value

2. PID_H/PID_L: high/low byte of PID value

3. CHKSUM: CHKSUM must equal to VID_H + VID_L + PID_H + PID_L + 1,otherwise

firmware will ignore the EEPROM settings.

4. PORT_NO: port number, value must be 1~4.

5. MaxPower : Describe the maximum power consumption, range=0Ma~500Ma .

Value -> 00H~FAH (unit = 2Ma)

6. DEVICE REMOVALBE:

-

-

-

PORT4

PORT3

PORT2

PORT1

REMOVABLE REMOVABLE REMOVABLE REMOVABLE

-

0: Device attached to this port is removable.

1: Device attached to this port is non-removable.

7. VENDOR LENGTH: offset 10h contains the length of the vendor string. Values of vendor string is

contained from 11h~3Fh.

8. PRODUCT LENGTH: offset 40h contains the length of product string. Values of product string is

contained from 41h~6Fh.

9. SERIAL NUMBER LENGTH: offset 70h contains the value of serial number string. Values of serial

number string is contained after offset 71h.

The schematics between GL850G and 93C46 is depicted in the following figures:

DVDD

EE_CS

EE_SK

EE_DI

EE_DO

CS

VCC

SK

NC

DI

NC

DO

GND

93C46

Figure 5.8 – Schematics Between GL850G and 93C46

GL850G firstly verifies the check sum after power on reset. If the check sum is correct, GL850G will take

the configuration of 93C46 as part of the descriptor contents. To prevent the content of 93C46 from being

over-written, amber LED will be disabled when 93C46 exists.

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