EM78568 データシートの表示（PDF） - ELAN Microelectronics

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EM78568

8-BIT OTP MICRO-CONTROLLER

ELAN Microelectronics 

EM78P568

8-bit OTP Micro-controller

R5(PAGE)

CALL and

INTERRUPT

PC A13 A12 A11 A10

A9 A8 A7~A0

0000 PAGE0 0000~03FF

0001 PAGE1 0400~07FF

RET

RETL

RETI

0010 PAGE2 0800~0BFF

1110 PAGE14 3800~3BFF

1111 PAGE15 3C00~3FFF

STACK1

STACK2

STACK3

STACK4

STACK5

STACK6

STACK7

STACK8

STACK9

STACK10

STACK11

STACK12

STACK13

STACK14

STACK15

STACK16

store

ACC,R3,R5(PAGE)

restore

Fig.3 Program counter organization

R3 (Status, Page selection)

(Status flag, Page selection bits)

7

6

5

4

3

2

1

0

RPAGE2 RPAGE IOCPAGE T

P

Z DC C

R/W-0 R/W-0 R/W-0

R

R R/W R/W R/W

Bit 0(C) : Carry flag

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(IOCPAGE) : change IOC5 ~ IOCE to another page

0/1 IOC page0 / IOC page1

Please refer to VII.1 Operational registers for detail IOC PAGE register configuration.

Bit 6 ~ Bit 7 (RPAGE0 ~ RPAGE1) : change R5 ~ RE to another page

(RPAGE1,RPAGE0)

R page # selected

(0,0)

R page 0

(0,1)

R page 1

(1,0)

R page 2

(1,1)

R page 3

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* This specification are subject to be changed without notice.

10

01/31/2004 V4.7

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