HD404374FT datasheet(33/161 Pages) RENESAS

33 / 161 page

HD404374/HD404384/HD404389/HD404082/HD404084 Series

Rev.5.00, Sep.11.2003, page 33 of 161

Table 1 (1) Initial Values after MCU Reset

Item

Abbr.

Initial

value

Contents

Program counter

(PC)

$0000

Program executed from ROM start address

Status flag

(ST)

Branching by conditional branch instruction enabled

Stack pointer

(SP)

$3FF

Stack level is 0

Interrupt

Interrupt enable flag

(IE)

All interrupts disabled

Interrupt request flag

(IF)

No interrupt requests

flags/ mask

Interrupt mask

(IM)

Interrupt requests masked

Port data register

(PDR)

All bits 1 "1" level output possible

Data control registers

(DCD0 ~ 2)

All bits 0

Data control registers

(DCR0

0 ,

DCR1

DCR2

0 –

DCR2

DCR7

0 –

DCR7

All bits 0

Output buffer off (high impedance)

Port mode register 0

(PMR0)

---0

See port mode register 0 section

Port mode register 1

(PMR1)

---0

See port mode register 1 section

Port mode register 2

(PMR2)

0--0

See port mode register 2 section

I/O

Port mode register 3

(PMR3)

0000

See port mode register 3 section

Timer mode register A

(TMA)

0000

See timer mode register A section

Timer mode register B1

(TMB1)

0000

See timer mode register B1 section

Timer mode register B2

(TMB2)

-000

See timer mode register B2 section

Timer mode register C1

(TMC1)

0000

See timer mode register C1 section

Timer mode register C2

(TMC2)

-0--

See timer mode register C2 section

Prescaler S

(PSS)

$000

Prescaler W

(PSW)

$00

Timer/counter A

(TCA)

$00

Timer/counter B

(TCB)

$00

Timer/counter C

(TCC)

$00

Timer write register B

(TWBU,L)

$X0

Timers

Timer write register C

(TWCU,L)

$X0

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