W921E843A Просмотр технического описания (PDF) - Winbond

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W921E843A

4-BIT MICROCONTROLLER

Winbond 

W921E840A/W921C840

• P4.0 to P4.3: Multi-function I/O pins (selected by P4IO register)

− Normal function I/O pins

− Special function input pins

P4IO register: (address = 010H, default data = 0H)

b3

b2

b1

b0

0: Normal I/O P4.0, interrupt disable

1: Interrupt port P4.0

0: Normal I/O P4.1, interrupt disable

1: Interrupt port P4.1

0: Normal I/O P4.2, interrupt disable

1: Interrupt port P4.2

0: Normal I/O P4.3, interrupt disable

1: INT0

• P5.0 to P5.3: Multi-function I/O pins (selected by P5IO register)

− Normal function I/O pins

− Special function I/O pins

P5IO register: (address = 011H, default data = 0H)

b3

b2

b1

b0

0: Normal I/O P5.0

1: Work as the timer 1 control pin

0: Normal I/O P5.1

1: Work as the timer 2 control pin

0: Normal I/O P5.2

1: Work as the Vref input pin of the comparator

0: Normal I/O P5.3

1: Work as the output pin of D/A converter

(DAOUT)

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