W77E468 查看數據表（PDF） - Winbond

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W77E468

8 BIT MICROCONTROLLER

Winbond 

Preliminary W77E468

Special Function Registers

The W77E468 uses Special Function Registers (SFRs) to control and monitor peripherals and their

Modes.

The SFRs reside in the register locations 80-FFh and are accessed by direct addressing only. Some

of the SFRs are bit addressable. This is very useful in cases where one wishes to modify a particular

bit without changing the others. The SFRs that are bit addressable are those whose addresses end in

0 or 8. The W77E468 contains all the SFRs present in the standard 8052. However, some additional

SFRs have been added. In some cases unused bits in the original 8052 have been given new

functions. The list of SFRs is as follows. The table is condensed with eight locations per row. Empty

locations indicate that there are no registers at these addresses. When a bit or register is not

implemented, it will read high.

Table 1. Special Function Register Location Table

F8 EIP

F0 B

E8 EIE

E0 ACC

D8 WDCON

D0 PSW

C8 T2CON T2MOD RCAP2L RCAP2H TL2

TH2

C0 SCON1 SBUF1 ROMMAP

PMR

STATUS

TA

B8 IP

SADEN SADEN1

B0 P3

A8 IE

SADDR SADDR1

A0 P2

HB

P6

P4

P5

98 SCON0 SBUF

90 P1

EXIF

88 TCON TMOD TL0

TL1

TH0

TH1

CKCON

80 P0

SP

DPL

DPH

DPL1

DPH1

DPS

PCON

Note: The SFRs in the column with dark borders are bit-addressable.

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Publication Release Date: January 1999

Revision A1

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