HD4043312S View Datasheet(PDF) - Renesas Electronics

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HD4043312S

4-bit HMCS400-Series microcomputer with large-capacity memory

Renesas Electronics 

Table 1 Initial Values of Flags after MCU Reset

Item

Interrupt flags/mask

Bit registers

Interrupt enable flag (IE)

Interrupt request flag (IF)

Interrupt mask (IM)

Watchdog timer on flag (WDON)

A/D start flag (ADSF)

Input capture status flag (ICSF)

Input capture error flag (ICEF)

IAD off flag (IAOF)

RAM enable flag (RAME)

Low speed on flag (LSON)

Direct transfer on flag (DTON)

HD404339 Series

Initial Value

0

0

1

0

0

0

0

0

0

0

0

RAM Address

$0000

Bit 3

IM0

(IM of INT0)

$0001

IMTA

(IM of timer A)

$0002

IMTC

(IM of timer C)

$0003

IMS

(IM of serial)

Bit 2

IF0

(IF of INT0)

IFTA

(IF of timer A)

IFTC

(IF of timer C)

IFS

(IF of serial)

Bit 1

RSP

(Reset SP bit)

IM1

(IM of INT1)

IMTB

(IM of timer B)

IMAD

(IM of A/D)

Bit 0

IE

(Interrupt

enable flag)

IF1

(IF of INT1)

IFTB

(IF of timer B)

IFAD

(IF of A/D)

Interrupt control bits area

$020

$021

IF: Interrupt

request flag

IM: Interrupt

$022

mask

IE: Interrupt

enable flag

$023

SP: Stack pointer

Bit 3

DTON

(Direct transfer

on flag)

RAME

(RAM enable

flag)

Bit 2

ADSF

(A/D start flag)

IAOF

(IAD off flag)

Bit 1

WDON

(Watchdog

on flag)

ICEF

(Input capture

error flag)

Not used

Register flag area

Bit 0

LSON

(Low speed

on flag)

ICSF

(Input capture

status flag)

Figure 3 Interrupt Control Bits and Register Flag Areas Configuration

11

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