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Table 3.1 AU9525 Pin Descriptions
Pin #
Pin Name
I/O
Description
1
AVCC
PWR
Analog 3.3V power supply
2
AVSS
PWR
Analog ground.
3
XTAL1
I
Crystal Oscillator Input (12MHz).
4
XTAL2
O
Crystal Oscillator Output (12MHz).
5
PSWOUTB
O
Connect to Slot1 Power.
6
PSWOUTA
O
Connect to Slot0 Power.
7
VCC5V
PWR
5V power supply Input
8
BVCC
PWR
3.3V power supply output
9
USB_DP
I/O
USB D+
10
USB_DM
I/O
USB D-
11
BVSS
PWR
Chip I/O Ground.
12
ChipRstN
I
Chip Reset
13
LCD_En
O
LCD Enable（High effective).
14
GPI_0
I
Reserved (need pull down)
15
LCD_Rw
O
LCD Read/Write.0:write;1:read.
16
GPI_1
I
Reserved (need pull down)
17
LCD_RS
O
LCD driver dedicated I/O line: LCD Register Select.
18
SCL
I/O
EEPROM Clock (need pull high)
19
SDA
I/O
EEPROM Data (need pull high)
20
LCD_BL
O
LCD Background Light control,1:on,0:off.
21
LCD_CS1
O
LCD Display control(To select the left side or right
side).
22
Key_Row4
I
Keyboard row input 4.
23
Key_Row3
I
Keyboard row input 3.
24
Key_Row2
I
Keyboard row input 2.
25
Key_Row1
I
Keyboard row input 1.
26
Key_Row0
I
Keyboard row input 0.
27
PORT1_2
O
Slot1 LED
28
PORT1_3
O
Slot2 LED
29
PORT1_4
O
Card Power LED
30
PORT1_5
I
PID/VID ("1": 9525 one slot mode, "0": 9526 two slot
mode, default: "1")
31
PORT1_6
I
Reserved(need pull Low)
32
PORT1_7
I
Reserved(need pull Low)
33
Key_Col5
I
Keyboard columniation input 5.
AU9525 USB Smart Card Reader Controller V1.00W
4
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