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參數資料
型號: MC68HC05C8A
廠商: Motorola, Inc.
英文描述: Microcontrollers
中文描述: 微控制器
文件頁數: 58/158頁
文件大小: 773K
代理商: MC68HC05C8A
Input/Output (I/O) Ports
Technical Data
MC68HC05C8A
MC68HCL05C8A
MC68HSC05C8A
Rev. 5.0
58
Input/Output (I/O) Ports
MOTOROLA
Figure 7-2. I/O Circuitry
Table 7-1. I/O Pin Functions
R/W
(1)
1. R/W is an internal signal.
DDR
I/O Pin Function
0
0
The I/O pin is in input mode. Data is written into the output
data latch.
0
1
Data is written into the output data latch and output to the I/O pin.
1
0
The state of the I/O pin is read.
1
1
The I/O pin is in an output mode. The output data latch is read.
READ DDRx
WRITE DDRx
RESET
WRITE PORTx
READ PORTx
I
PORT x DATA
REGISTER BIT
(LATCHED OUTPUT)
DATA DIRECTION
REGISTER x BIT
I/O
PIN
[1]
[2]
[3]
[1] This output buffer enables the latched output to drive the pin when DDR bit is 1 (output mode).
[2] This input buffer is enabled when DDR bit is 0 (input mode).
[3] This input buffer is enabled when DDR bit is 1 (output mode).
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