W921C880 Просмотр технического описания (PDF) - Winbond

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W921C880

4-BIT MICROCONTROLLER

Winbond 

W921E880A/W921C880

* P7.0−P7.3:

* P3.0−P3.3:

Four 15 mA sink current pins

Normal I/O pins only.

Normal function is the same as port P0

Multi-function I/O pins.

Normal function is the same as port P0

Special function input pins

P3IO REG: (ADDRESS = 00FH)

(Default data = 0H)

b3

b2

b1

b0

0: Normal I/O P3.0

1: Analog input pin 0 -- ANI0

0: Normal I/O P3.1

1: Analog input pin 1 -- ANI1

0: Normal I/O P3.2

1: Analog input pin 2 -- ANI2

0: Normal I/O P3.3

1: Analog input pin 3 -- ANI3

* P4.0−P4.3:

Multi-function I/O pins.

Normal function is the same as port P0

Special function input pins

P4IO REG: (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

- 15 -

Publication Release Date: July 1999

Revision A3

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