User's Manual

A8000 User Guide
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A8000_User_Guide_V1.0 Page 13 of 22 2009/05/13
KEYPADCOL2 8 O Keypad array output
KEYPADCOL3 9 O Keypad array output
KEYPADCOL4 10 O Keypad array output
KEYPADCOL5/
KEYPADROW0
11
O/I Keypad array input/output
KEYPADROW1 12 I Keypad array input
KEYPADROW2 13 I Keypad array input
KEYPADROW3 14 I Keypad array input
KEYPADROW4 15 I Keypad array input
2.9 IIC Interface
2.9.1 Interface Description
A8000 provides an IIC interface: IIC_SCL and IIC_SDA is working as serial clock and data lines
respectively, and the serial clock speed is programmable in the range from 51 kHz to 3.25 MHz.
external resistance(10KΩ) needed to pull both IIC_SCL and IIC_SDA up to 2.8V level power
line(VDD_LIO) in user’s application, the IIC pins is descript in table2-12 as follows.
Table2-12 IIC interface pins description of A8000
Signal Name Pin No. I/O Description
IIC_CLK 68 I/O IIC clock
IIC_DATA 69 I/O IIC data
GND
1,2,4,5,20
,21,49,59,
60
- Ground
2.10 Parallel Port Interface
To communicate with parallel port devices, A8000 extended parallel port, which consists 3 bit
address, 8 bit data, a CS bit, a /WE bit and an OE bit, just as defined in table2-13 below.