參數(shù)資料
型號(hào): MB91F155A
廠商: Fujitsu Limited
英文描述: 32-bit Proprietary Microcontrollers
中文描述: 32位微控制器專有
文件頁數(shù): 38/105頁
文件大小: 989K
代理商: MB91F155A
MB91F155A/MB91155/MB91154
38
I
/
O Port
(
attached with the open drain output function and a pullup resistor
)
Figure PORT-3 Port block attached with the open drain output function and a pullup resistor
Notes :
Pullup resistor setup register (PCR) R/W
Controls turning the pullup resistor on/off.
0 : Pullup resistor disabled
1 : Pullup resistor enabled
Open drain control register (ODCR) R/W
Controls open drain in output mode.
0 : Standard output port during output mode
1 : Open-drain output port during output mode
This register has no significance in input mode (output Hi-Z) . Input/output mode is determined by the
direction register (DDR) .
Priority is also given to the setting of the pullup resistor control register in stop mode.
When a relevant pin is used as an external bus pin, neither function is available. Do not write “1” to either
register.
Data bus
PDR read
0
1
0
1
pin
Resource input
Resource output
Resource output
allowed
PDR
DDR
ODCR
PCR
PDR
DDR
ODCR
PCR
: Port Data Register
: Data Direction Register
: OpenDrain Control Register
: Pull-up Control Register
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