Alcor AU9331 Technical Reference Manual - Page 10

Browse online or download pdf Technical Reference Manual for Card Reader Alcor AU9331. Alcor AU9331 19 pages. Usb secure digital card reader

Print Page
Table 3-1. Pin Descriptions
pin Name
IO Type
1
NC
2
XTAL1
I
3
XTAL2
O
4
VSSA
Ground
5
VCCA
PWR
6
VCC5V
PWR
7
VCCIO
PWR
8
USB_DM
I/O
9
USB_DP
I/O
10
SDA
I/O
11
SCK
O
12
VSSIO
PWR
13
Test
I
14
NC
15
NC
16
PWD
O
17
SDWP
I
18
SDCD
I
19
SDDATA
I/O
20
SDCLK
O
21
SDCMD
I/O
22
VSSK
PWR
23
VCCK
PWR
24
GPI2
I
25
GPI1
I
26
GPI0
I
27
GPO7
O
28
NC
Description
Crystal Oscillator Input (12MHz)
Crystal Oscillator Output (12MHz)
Analog Ground
Analog power supply
5V power supply
Regular 3.3V output/ IO 3.3V input
USB D-
USB D+
EEPROM data inout
EEPROM clcok
Ground
Should connect to Vss
0 Power on; 1 Power down
SD Write Protect
SD Card Detect
SD Card Data
SD Card Clock
SD Card Command
Ground
Core 3.3V Input
Should connect to Vss
Should connect to Vss
Should connect to Vss
General Purpose Output pin, used as activity LED
PIN ASSIGNMENT
6