EM78862B Ver la hoja de datos (PDF) - ELAN Microelectronics

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EM78862B

8-Bit RISC Type Microprocessor

ELAN Microelectronics 

EM78862B

8-Bit RISC Type Microprocessor

Fig. 4 Data Memory Configuration

6.1.4 R3 (Status Register)

Bit 7

–

Bit 6

PAGE

Bit 5

0

Bit 4

T

Bit 3

P

Bit 2

Z

Bit 1

DC

Bit 0

C

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

WDT wake-up from sleep mode

0

WDT time out (not sleep mode)

0

RESET wake up from sleep

1

Power up

1

Low pulse on RESET pin

X

P

Remark

0

1

0

Low active

1

X

X =Don't care

Bit 5: Unused, fixed at “0”

Bit 6: (PAGE) Change IOCB ~ IOCE to another page, 0/1 => page0 / page1

Bit 7: Unused

6 of 36 Mar.01.2005 (V1.1)

This specification is subject to change without further notice.

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