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MB91155 Datasheet(PDF) 37 Page - fujitsu semiconductor

Part # MB91155
Description  32-bit Proprietary Microcontrollers
PDF  105 Pages
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Manufacturer  FUJITSU [fujitsu semiconductor]
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Logo FUJITSU - fujitsu semiconductor

MB91155 Datasheet(HTML) 37 Page - fujitsu semiconductor

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MB91F155A/MB91155/MB91154
37
• I/O Port (attached with a pullup resistor)
Figure PORT-2 Port block attached with a pullup resistor
Notes :
• Pullup resistor control register (PCR) R/W
Controls turning the pullup resistor on/off.
0 : Pullup resistor disabled
1 : Pullup resistor enabled
• In stop mode priority is also given to the setting of the pullup resistor control register.
• This function is not available when a relevant pin is in use as an external bus pin. Do not write “1” to this
register.
Data bus
PDR read
0
1
0
1
pin
PDR
DDR
PCR
PDR : Port Data Register
DDR : Data Direction Register
PCR : Pull-up Control Register
Resource output
Resource input
Resource output
allowed
Pull-up resister (approx. 50 k
Ω)



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