W78C54 Ver la hoja de datos (PDF) - Winbond

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W78C54

8-BIT MICROCONTROLLER

Winbond 

W78C54

Note: In column BIT_ADDRESS, SYMBOL, containing ( ) item means the bit address.

* SFRs modified or added to the W78C52. + Reset value depends on reset condition.

W78C54 SFRs address location map:

F8

FF

F0

+B

F7

E8

EF

E0

+ ACC

E7

D8

+P4

DF

D0

+ PSW

D7

C8

+T2CON

RCAP2L RCAP2H

TL2

TH2

CF

C0

+XICON

C7

B8

+ IP

BF

B0

+ P3

B7

A8

+ IE

AF

A0

+ P2

A7

98

+ SCON SBUF

9F

90

+ P1

97

88

+ TCON TMOD

TL0

TL1

TH0

TH1

AUXR

8F

80

+P0

SP

DPL

DPH

PCON

87

Notes:

1. + SFR is bit-addressable.

2.

is additional defined function.

Power-off Flag

***PCON - Power Control (87H)

SMOD SMOD0

-

POF

GF1

GF0

PD

IDL

SMOD:

Double baud rate bit. When set to a 1, the baud rate is doubled when the serial port is

being used in either modes 1, 2, 3.

SMOD0: Enable FE bit in SCON. This bit is an alternative switch of SM0 and FE (Frame Error)

bit.

When set to a 1, SCON.7 means a FE bit, otherwise a SM0 bit.

POF:

Power off flag. Bit is set by hardware when power on reset. It can be cleared by software

to determine chip reset is a warm boot or cold boot.

GF1, GF0: These two bits are general-purpose flag bits for the user.

PD:

Power down mode bit. Set it to enter power down mode.

IDL:

Idle mode bit. Set it to enter idle mode.

The power-off flag is located at PCON.4. This bit is set when VDD has been applied to the part. It can

be used to determine if a reset is a warm boot or a cold boot if it is subsequently reset by software.

-8-

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