At8xc51snd1c – Rainbow Electronics AT89C51SND1C User Manual

Page 35

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35

AT8xC51SND1C

4109E–8051–06/03

Reserved

Notes:

1. SFR registers with least significant nibble address equal to 0 or 8 are bit-addressable.
2. NVERS reset value depends on the silicon version: 1000 0100 for AT89C51SND1C product and 0000 0001 for

AT83C51SND1C product.

3. FCON register is only available in AT89C51SND1C product.
4. FCON reset value is 00h in case of reset with hardware condition.
5. CKCON reset value depends on the X2B bit (programmed or unprogrammed) in the Hardware Byte.

Table 47. SFR Addresses and Reset Values

0/8

1/9

2/A

3/B

4/C

5/D

6/E

7/F

F8h

UEPINT

0000 0000

DAT16H

XXXX XXXX

NVERS

XXXX XXXX

(2)

FFh

F0h

B

(1)

0000 0000

ADCLK

0000 0000

ADCON

0000 0000

ADDL

0000 0000

ADDH

0000 0000

F7h

E8h

PLLCON

0000 1000

USBCLK

0000 0000

MP3CLK

0000 0000

AUDCLK

0000 0000

MMCLK

0000 0000

PLLNDIV

0000 0000

PLLRDIV

0000 0000

EFh

E0h

ACC

(1)

0000 0000

UBYCTLX

0000 0000

MMCON0

0000 0000

MMCON1

0000 0000

MMCON2

0000 0000

MMINT

0000 0011

E7h

D8h

P5

(1)

XXXX 1111

MMDAT

1111 1111

MMCMD

1111 1111

MMSTA

0000 0000

MMMSK

1111 1111

DFh

D0h

PSW

(1)

0000 0000

FCON

(3)

1111 0000

(4)

UEPCONX

1000 0000

UEPRST

0000 0000

D7h

C8h

MP3STA

(1)

0000 0001

UEPSTAX

0000 0000

UEPDATX

XXXX XXXX

CFh

C0h

P4

(1)

1111 1111

UEPIEN

0000 0000

SPCON

0001 0100

SPSTA

0000 0000

SPDAT

XXXX XXXX

USBADDR

0000 0000

UEPNUM

0000 0000

C7h

B8h

IPL0

(1)

X000 0000

SADEN

0000 0000

UFNUML

0000 0000

UFNUMH

0000 0000

USBCON

0000 0000

USBINT

0000 0000

USBIEN

0001 0000

BFh

B0h

P3

(1)

1111 1111

IEN1

0000 0000

IPL1

0000 0000

IPH1

0000 0000

MP3BAS

0000 0000

MP3MED

0000 0000

MP3TRE

0000 0000

IPH0

X000 0000

B7h

A8h

IEN0

(1)

0000 0000

SADDR

0000 0000

MP3CON

0011 1111

MP3DAT

0000 0000

MP3ANC

0000 0000

MP3STA1

0100 0001

AFh

A0h

P2

(1)

1111 1111

AUXR1

XXXX 00X0

KBCON

0000 1111

KBSTA

0000 0000

WDTRST

XXX XXXX

WDTPRG

XXXX X000

A7h

98h

SCON

0000 0000

SBUF

XXXX XXXX

AUDCON0

0000 1000

AUDCON1

1011 0010

AUDSTA

1100 0000

AUDDAT

1111 1111

MP3VOL

0000 0000

MP3VOR

0000 0000

9Fh

90h

P1

(1)

1111 1111

BRL

0000 0000

BDRCON

XXX0 0000

SSCON

0000 0000

SSSTA

1111 1000

SSDAT

1111 1111

SSADR

1111 1110

97h

88h

TCON

(1)

0000 0000

TMOD

0000 0000

TL0

0000 0000

TL1

0000 0000

TH0

0000 0000

TH1

0000 0000

AUXR

X000 1101

CKCON

0000 000X

(5)

8Fh

80h

P0

(1)

1111 1111

SP

0000 0111

DPL

0000 0000

DPH

0000 0000

PCON

XXXX 0000

87h

0/8

1/9

2/A

3/B

4/C

5/D

6/E

7/F

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