NJU3503L 데이터 시트보기 (PDF) - Japan Radio Corporation

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NJU3503L

4-BIT SINGLE CHIP MICRO CONTROLLER

Japan Radio Corporation  

NJU3503

(2) PROGRAMMABLE INPUT/OUTPUT PORT OPERATION

a. The output operation example

PA0 and PA1 of PORTA output “H”, and PA2 and PA3 of PORTA output “L”.

:

SRPC

;

LDI Y,0

LDI A,%0001

TAP

; Peripheral table is

;

set as the table1

;

LDI Y,1

;PHY17 is pointed

LDI A,%0011

;"0011" is stored into Accumulator

TAP

;Data in Accumulator is transmitted to PHY17

; (PORTA output register)

LDI Y,8

LDI A,%1111

TAP

;PHY24 is pointed

;"1111" is stored into Accumulator

;Data in Accumulator is transmitted to PHY24

PORTA is

set as the output

:

b. The input operation example

Accumulator gets the input data from PORTA.

:

SRPC

;

LDI Y,0

LDI A,%0001

TAP

; Peripheral table is

;

set as the table1

;

LDI Y,8

LDI A,%0000

TAP

;PHY24 is pointed

;"0000" is stored into Accumulator

;Data in Accumulator is transferred to PHY24

PORTA is

set as the input

LDI Y,1

;PHY17 is pointed

TPA

;The input data from PHY17 is transferred to Accumulator

:

The signal from PA0 terminal is stored into the LSB of Accumulator, the signal from PA1 terminal is

stored into the b1 of Accumulator, the signal from PA2 terminal is stored into the b2 of Accumulator,

and the signal from PA3 terminal is stored into the b3 of Accumulator.

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