參數(shù)資料
型號: MC38HC705J2
廠商: Motorola, Inc.
元件分類: DC/DC變換器
英文描述: RTS Series - Econoline Unregulated DC-DC Converters; Input Voltage (Vdc): 05V; Output Voltage (Vdc): 3.3V; Power: 2W; Assembly; High Power Density; Optional Continuous Short Circuit Protected; Efficiency to 85%
中文描述: M68HC05系列系列8位微控制器單元
文件頁數(shù): 17/78頁
文件大小: 427K
代理商: MC38HC705J2
MOTOROLA
3-2
PARALLEL I/O
MC68HC705J2
I/O
PIN
DATA DIRECTIO
REGISTER
BIT
LATCHED
OUTPUT DATA
BIT
C
D
[1]
[2]
[3]
[1] Output buffer enables latched output to drive I/O pin when DDR bit is 1 (output mode).
[2] Input buffer enabled when DDR bit is 0 (input mode).
[3] Input buffer enabled when DDR bit is 1 (output mode).
Figure 3-1. Parallel I/O Port Circuit
Table 3-1. I/O Pin Functions
R/W
0
0
1
1
DDR Bit
I/O Pin Function
0
1
0
1
The I/O pin is an input. Data is written into the output data latch.
Data is written into the output data latch, which drives the I/O pin.
The state of the I/O pin is read.
The I/O pin is an output. The output data latch is read.
NOTE: R/W is an internal MCU signal.
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