GL650USB Просмотр технического описания (PDF) - Unspecified
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GL650USB Datasheet PDF : 16 Pages
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GL650USB 4 PORT USB HUB CONTROLLER
2 FUNCTION OVERVIEW
The GLI650USB is a 5 port USB hub with 1 upstream port and 4 downstream ports. It
uses an 8-bit RISC-like uC to encode/decode the host commands. The GL650USB is
designed mainly for stand-alone hub and can also be integrated in PC mo therboard or any
other devices to support USB hub function. The GL650USB can switch between self-
power and bus-power automatically without re-plug in. The GL650USB 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 GL650USB supplies power enable flags by reading the over-current
flags. The GL650USB 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 GL650USB will turn LED off and stop the
clock when they are suspended.
3 PIN DEFINITIONS AND DESCRIPTIONS
l GL650USB
Pin No.
Name
1
DP0
2
DM0
3
AGND
4
NC
5
NC
6
DP1
7
DM1
8
NC
9
NC
10
DP4
11
DM4
12
AVCC
13
DP2
14
DM2
15
VCP
16
NC
17
NC
18
DP3
19
DM3
20
SUSPND
21
SELF
22
LED1
23
LED2
24
LED3
25
RESET
26
LED4
27
OVCUR4#
28
NC
29
PWRENB4#
I/O
Descriptio n
I/O Upstream port USB data+
I/O Upstream port USB data-
-
Analog ground
-
15K resister pull low
-
15K resister pull low
I/O Downstream port 1 USB data+
I/O Downstream port 1 USB data-
-
15K resister pull low
-
15K resister pull low
I/O Downstream port 4 USB data+
I/O Downstream port 4 USB data-
-
Analog VCC(5V)
I/O Downstream port 2 USB data+
I/O Downstream port 2 USB data-
-
3.3V output
-
15K resister pull low
-
15K resister pull low
I/O Downstream port 3 USB data+
I/O Downstream port 3 USB data-
O Suspend indication output
I
1: SELF-powered. 0: INDIVIDUAL-powered
O LED traffic indicator for downstream port 1
O LED traffic indicator for downstream port 2
O LED traffic indicator for downstream port 3
I
Reset input
O LED traffic indicator for downstream port 4
I
Over current flag for downstream port4
-
-
O Power enable for downstream port 4
3
08/18/00
Revision 1.2
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