GL850 View Datasheet(PDF) - Genesys Logic
Part Name
Description
MFG CO.
'GL850' PDF : 40 Pages View PDF
GL850 USB 2.0 4-Port HUB Controller
5.2.4 LED Connections
GL850 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 GL850. When GL850
is globally suspended, GL850 will turn off the LED to save power.
AMBER/GREEN
Inside GL850
LED
On PCB
DGND
Figure 5.8 - LED Connection
5.2.5 EEPROM Setting
GL850 replies to host commands by the default settings in the internal ROM. GL850 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
00h
01h
02h
03h
04h 05h 06h 07h
00
VID_H
VID_L
PID_H
PID_L
CHKSUM
FF
PORT_NO
DEVICE
REMOVABLE
FF
FF
FF
FF
FF
FF
FF
FF
08
VENDOR
LENGTH
XX
XX
XX
XX XX XX
XX XX XX XX XX XX XX XX XX
10 XX XX XX XX XX XX XX
XX XX XX XX XX XX XX XX XX
18 XX XX XX XX XX XX XX
XX XX XX XX XX XX XX XX XX
20
PRODUCT
LENGTH
XX
XX
XX
XX XX XX
XX XX XX XX XX XX XX XX XX
28 XX XX XX XX XX XX XX
XX XX XX XX XX XX XX XX XX
30 XX XX XX XX XX XX XX
XX XX XX XX XX XX XX XX XX
SERIAL
38 NUMBER XX XX XX
LENGTH
XX XX XX
XX XX XX XX XX XX XX XX XX
40 XX XX XX XX XX XX XX
XX XX XX XX XX XX XX XX XX
48 XX XX XX XX XX XX XX
XX XX XX XX XX XX XX XX XX
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.
©2000-2003 Genesys Logic Inc.—All rights reserved.
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