AU9254_05 Datasheet, PDF (9/23 Pages) List of Unclassifed Manufacturers – USB Hub Controller

Table 3.1 Pin Descriptions of Au9254, 28-pin SSOP
Pin #
Pin Name
Input/Output
Description
1
USB_DM
Input/Output USB D- for downstream port 2; add 15KΩ pull-down to ground.
2
USB2_DP
Input/Output USB D+ for downstream port 2; add 15KΩ pull-down to ground.
3
USB3_DM
Input/Output USB D- for downstream port 3; add 15KΩ pull-down to ground.
4
USB3_DP
Input/Output USB D+ for downstream port 3; add 15KΩ pull-down to ground.
5
USB4_DM
Input/Output USB D- for downstream port 4; add 15KΩ pull-down to ground.
6
USB4_DP
Input/Output USB D+ for downstream port 4; add 15KΩ pull-down to ground
7
DP4_PWRUP
Output
Downstream port 4 power switch control. Active low.
8
DP2_PWRUP
Output
Downstream port 2 power switch control. Active low.
9
BUS_PWRED
Input
Bus power. Low indicates bus-powered.
10 VCC5O/VCC5IK
Power
+5 V power supply.
11 GND5O/GND5IK
Power
Ground.
12
VCC3V
Power
3.3V output for upstream D+ pull-up.
13
DP1_PWRUP
14
GANGPOWER
15
DP1_OVRCUR
Output
Input
Input
Downstream port 1 power switch control. Active low.
Ganged or individual port power selection. Add a 10k pull down
for ganged power. 10k pull up for individual power.
Downstream port 1 over-current indicator. Active low.
16
SUSPEND
Output
Device is in suspended state: Active high.
17
DP2_OVRCUR
Input
Downstream port 2 over-current indicator. Active low.
18
NC
19
AGND/GNDO
Power
Ground.
20
XTAL_1
Input
Crystal in.
21
XTAL_2
Output
Crystal out.
22
DP3_PWRUP
Output
Downstream port 3 power switch control. Active low.
23
DP4_OVRCUR
Input
Downstream port 4 over-current indicator. Active low.
24
DP3_OVRCUR
Input
Downstream port 3 over-current indicator. Active low.
25
USB_DM
Input/Output USB D- for upstream.
26
USB_DP
Input/Output USB D+ for upstream port. Need external 1.5KΩ pull-up to 3.3V.
27
USB1_DM
Input/Output USB D- for downstream port 1; add 15KΩ pull-down to ground.
28
USB1_DP
Input/Output USB D+ for downstream port 1; add 15KΩ pull-down to ground.
AU9254 USB Hub Controller V1.02W
Official Release_ Public
Page 9 of 23