SystemBase Eddy DK, Руководство программиста

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Eddy DK Programmer Guide
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2.4.5.2. LCD Module
Graphic LCD Module (PowerTIP PG12864LRU-JCNH11Q and I2C-Bus I/O Expander IC PCA9539)
Signal Name Function Description I/O
P[00:07] Data bits
Used for data transfer between the CPU and the LCD
module.
I/O
P10 /CS1 Chip enable for D2 (Segment 1 to 64) IN
P11 /CS2 Chip enable for D3 (Segment 65 to 128) IN
P12 R/W
R/W signal input is used to select the read /write
mode
High = Read mode, Low = Write mode
IN
P13 D/ I
Register selection input
High = Data register
Low = Instruction register (for write)
Busy flag address counter (for read)
IN
P14 E Start enable signal to read or write the data. IN
2.4.5.3. 16bit I2C Bus GPIO
This 16-bit I2C Bus GPIO (PCA9539) provides general-purpose remote I/O expansion.
Slave address of this chip is set to 0x74 in DK board. and Address can be changed with A1,A0 address input from
0x74 to 0x77.
16-bit I/O is used to Digital Input/Output as below, and this is connected with the Expansion Header also. If you use
for GPIO, it is possible to configure individually.
Function Description I/O
P00-P07 DIO Output, Connected with DO[0:7] OUT
P00 DIO output, DO0
P01 DIO output, DO1
P02 DIO output, DO2
P03 DIO output, DO3
P04 DIO output, DO4
P05 DIO output, DO5
P06 DIO output, DO6
P07 DIO output, DO7
P10-P17 DIO Intput, Connected with DI[0:7] IN
P10 DIO Input, DI0