W77E516 데이터 시트보기 (PDF) - Nuvoton Technology

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W77E516

8-BIT MICROCONTROLLER

Nuvoton Technology 

W77E516A

6.3 Special Function Registers

The W77E516 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 W77E516 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

C0 SCON1 SBUF1 WSCON

PMR

B8 IP

SADEN SADEN1

B0 P3

A8 IE

SADDR SADDR1

SFRAL

A0 P2

P4CSIN

98 SCON0 SBUF

P42AL P42AH P43AL

90 P1

EXIF

P4CONA P4CONB P40AL

88 TCON

TMOD

TL0

TL1

TH0

80 P0

SP

DPL

DPH

DPL1

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

TH2

STATUS

TA

SFRAH

P4

P43AH

P40AH

TH1

DPH1

SFDFD

P41AL

CKCON

DPS

SFRCN

CHPCON

P41AH

PCON

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