W921E400A Datasheet, PDF (17/53 Pages) Winbond – 4-BIT MICROCONTROLLER

W921E400A/W921C400
P6TP register: (address = 006H, default data = 0H)
b3
b2
b1
b0
0: P6.0 work as CMOS type
1: P6.0 work as open-drain type
0: P6.1 work as CMOS type
1: P6.1 work as open-drain type
0: P6.2 work as CMOS type
1: P6.2 work as open-drain type
0: P6.3 work as CMOS type
1: P6.3 work as open-drain type
• PA, PB:
PABPH register: (address = 007H, default data = 0H)
b3
b2
b1
b0
Reserved
Reserved
0: PA (4 pins) without pull-high resistor
1: PA (4 pins) with pull-high resistor
0: PB (4 pins) without pull-high resistor
1: PB (4 pins) with pull-high resistor
PABTP register: (address = 008H, default data = 0H)
b3
b2
b1
b0
Reserved
Reserved
0: PA (4 pins) work as CMOS type
1: PA (4 pins) work as open-drain type
0: PB (4 pins) work as CMOS type
1: PB (4 pins) work as open-drain type
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Publication Release Date: July 1999
Revision A3