参数资料
型号: MB90654APF
元件分类: 微控制器/微处理器
英文描述: 16-BIT, MROM, 12 MHz, MICROCONTROLLER, PQFP100
封装: PLASTIC, QFP-100
文件页数: 33/106页
文件大小: 873K
代理商: MB90654APF
MB90650A Series
32
(Continued)
* : The operation of reading or writing to I/O ports is slightly different from reading or writing to memory, as follows.
Input mode
Read: Reads the corresponding pin level.
Write: Writes to the output latch.
Output mode
Read: Reads the value of the data register latch.
Write: The value is output from the corresponding pin.
When pins are used as ports, the register bits control the corresponding pins as follows.
0: Input mode
1: Output mode
Bits are set to “0” by a reset.
P47, P70 to P72
No DDR for this port. Data is always available in this port, so when using P70 and P71 as I2C pin, set PDR
value to “1”. (Otherwise when using P70 and P71 by themselves, turn off the I2C.)
As this port is open-drain output style, so when using this port as an input port, in order to turn off the output
transistor, set the output data resister value to “1” and add the pull up resister to the external pin.
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