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
REMOVABLE
PORT3
REMOVABLE
PORT2
REMOVABLE
PORT1
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
SK
DI
VCC
NC
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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