GL850G USB 2.0 Low-Power HUB Controller
5.2.4 LED Connections
GL850G controls the LED lighting according to the flow defined in section 11.5.3 of Universal Serial Bus
Specification Revision2.0. Both manual mode and Automatic mode are supported in GL850G. When
GL850G is globally suspended, GL850G will turn off the LED to save power.
AMBER/GREEN
LED
DGND
Inside GL850G
On PCB
Figure 5.7 – LED Connection
5.2.5 EEPROM Setting
GL850G replies to host commands by the default settings in the internal ROM. GL850G also offers the
ability to reply to the host according to the settings in the external EEPROM(93C46). The following table
shows the configuration of 93C46.
Table 5.1 – 93C46 Configuration
Unit: Byte
00
01
02
03
04
05
06
07
08
09 0A 0B 0C 0D 0E 0F
PORT
NUMBER
DEVICE
REMOVABLE
CHKSUM
VID_L
VID_H PID_L PID_H
FF
MaxPower FF
FF
FF FF FF FF FF
00h
10h
VENDOR
LENGTH
ꢀ
start
Vendor string (ASC II code)
Product String(ASC II code)
20h
30h
40h
50h
60h
end
end
PRODUCT
LENGTH
ꢀ
ꢀ
start
start
SERIAL
NUMBER
LENGTH
Serial Number String(ASC II code)
70h
end
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