EM78P813

8-bit OTP Micro-controller

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* This specification is subject to change without notice.

15

2004/8/19

(V1.6)

A16 A15 A14 A13 A12 A11 A10

A9 A8

A7~A0

0000000 PAGE0 00000~003FF

0000001 PAGE1 00400~007FF

1111110 PAGE126 1F800~1FBFF

1111111 PAGE127 1FC00~1FFFF

0000010 PAGE2 00800~00BFF

STACK1

STACK2

STACK5

STACK4

STACK3

STACK6

STACK8

STACK7

:

:

STACK30

STACK31

STACK32

CALL

and

INTERRUPT

RET

RETL

RETI

ACC,R3,R5(PAGE)

R5(PAGE)

store

restore

Fig.8 : Program counter organization

R3 Status Register

7

6

5

4

3

2

1

0

RS1

RS0

IOCS

T

P

Z

DC

C

Bit 0 (C) : Carry

Bit 1 (DC) : Auxiliary carry flag

Bit 2 (Z) : Zero flag

Bit 3 (P) : Power down bit.

Set to 1 during power on or by a "WDTC" command and reset to 0 by a "SLEP" command.

Bit 4 (T) : Time-out bit.

Set to 1 by the "SLEP" and "WDTC" command, or during power up and reset to 0 by WDT timeout.

EVENT

T

P

REMARK

WDT wake up from sleep mode

0

0

WDT time out (not sleep mode)

0

1

/RESET wake up from sleep

1

0

Power up

1

1

Low pulse on /RESET

x

X

x : don't care

Bit 5 (IOCS) : IOC register select bit. Change IOC5 ~ IOCE to another PAGE

Bit 6~Bir 7 (RS0 ~ RS1) : R register select bits. Change R5 ~ RE to another PAGE.

RS1

RS0

R PAGE

0

0

PAGE 0

0

1

PAGE 1

1

0

PAGE 2

1

1

PAGE 3