參數(shù)資料
型號: MB91110PMT2
元件分類: 微控制器/微處理器
英文描述: 32-BIT, 50 MHz, RISC MICROCONTROLLER, PQFP144
封裝: PLASTIC, LQFP-144
文件頁數(shù): 27/98頁
文件大?。?/td> 1049K
代理商: MB91110PMT2
MB91110 Series
33
s
s PERIPHERAL RESOURCES
1.
I/O Port
MB91110 series can be used as the I/O port when settings for resources that handle each pin do not to use the
pins for input/output.
Block diagram
I/O Port Registers
I/O port is composed of the Port Data Register (PDR) and Data Direction Register (DDR) .
In cases where the input mode is DDR = “0”
For PDR reading : Level of external pins to be handled is read out.
For PDR writing : Set value is written in PDR.
In cases where the output mode is DDR = “1”
For PDR reading : PDR value is read out.
For PDR writing : Set value is written in PDR and the PDR value is simultaneously output to the
externally handled pin.
PDR
DDR
1
0
1
0
Data Bus
pin
PDR read
PDR
: Port Data Register
DDR
: Data Direction Register
Resource input
Resource
output
Resource output
allowed
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