AU9254A21 Ver la hoja de datos (PDF) - Unspecified
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AU9254A21 Datasheet PDF : 32 Pages
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Table 3-1. Pin Descriptions of Au9254A21, 28-pin SSOP
Pin
Pin Name
No
1 USB_DM
Input/Output
Description
Input/Output USB D- for downstream port 2; add 15KΩ pull-down
to ground.
2 USB2_DP
3 USB3_DM
4 USB3_DP
Input/Output USB D+ for downstream port 2; add 15KΩ pull-
down to ground.
Input/Output USB D- for downstream port 3; add 15KΩ pull-down
to ground.
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
9 BUS_PWRED
Output
Input
Downstream port 2 power switch control. Active
low.
Bus power. Low indicates bus-powered.
10 VCC5O/VCC5IK
11 GND5O/GND5IK
12 VCC3V
13 DP1_PWRUP
Power
Power
Power
Output
+5 V power supply.
Ground.
3.3V output for upstream D+ pull-up.
Downstream port 1 power switch control. Active
low.
14 GANGPOWER
Input
Ganged or individual port power selection. Add a
10k pull down for ganged power. 10k pull up for
individual power.
15 DP1_OVRCUR
Input
Downstream port 1 over-current indicator. Active
low.
SYSTEM ARCHITECTURE AND REFERENCE DESIGN
6
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