M38B53M4-059FP datasheet(122/355 Pages) MITSUBISHI

122 / 355 page

2-34

38B5 Group User’s Manual

APPLICATION

2.2 Timer

Fig. 2.2.31 Control procedure

RESET

SEI

TXM1

TXM2

TXL

TXH

IREQ1

ICON1

TXM1

CLI

1X00X0102

XXXX00112

D016

2F16

(address 2E16)

(address 2F16)

(address 2C16)

(address 2D16)

(address 3C16),bit4

(address 3E16),bit4

(address 2E16), bit7

RTI

•All interrupts disabled

Initialization

•Setting Timer X

•Setting RTP function, “002” data from table

•Setting Timer X initial value, “2FD02” data from table

•Timer X interrupt request cleared

•Timer X interrupt enabled

•Timer X count start

•Interrupts enabled

Main processing

Timer X interrupt process routine

CLT (Note 1)

CLD (Note 2)

Push registers to stack

Pop registers

Notes 1: When using Index X mode flag (T)

2: When using Decimal mode flag (D)

•Pushing registers used in interrupt process routine

•Popping registers pushed to stack

Transfer the next underflow time of Timer X

from internal ROM table and store it to TXL

(address 2C16) and TXH (address 2D16)

Transfer RTP output data from internal

ROM table next underflow of Timer X and

store it to bits 2 and 3 of TXM2 (address

2F16) and TXH (address 2D16)

q X: This bit is not used here. Set it to “0” or “1” arbitrary.

RTP: Real Time Port

M38B53M4-059FP Datasheet(PDF) 122 Page - Mitsubishi Electric Semiconductor

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