AT8xC51SND2C
Table 35. Port SFRs
Mnemonic Add Name
7
6
5
4
3
2
1
0
P0
P2
P3
P4
80h 8-bit Port 0
A0h 8-bit Port 2
B0h 8-bit Port 3
C0h 4-bit Port 4
-
-
-
-
Table 36. Auxiliary SFRs
Mnemonic Add Name
7
6
5
4
3
2
1
0
AUXCON
90h Auxiliary Control
SDA
SCL
-
AUDCDOUT AUDCDIN AUDCCLK AUDCCS
KIN0
Table 37. Flash Memory SFR
Mnemonic Add Name
7
6
5
4
3
2
1
0
FCON(1)
Note:
D1h Flash Control
FPL3
FPL2
FPL1
FPL0
FPS
FMOD1
FMOD0
FBUSY
1. FCON register is only available in AT89C51SND2C product.
Table 38. Timer SFRs
Mnemonic Add Name
7
6
5
4
3
2
1
0
TCON
TMOD
TL0
88h Timer/Counter 0 and 1 Control
TF1
TR1
TF0
M11
TR0
M01
IE1
IT1
IE0
M10
IT0
M00
89h Timer/Counter 0 and 1 Modes
8Ah Timer/Counter 0 Low Byte
8Ch Timer/Counter 0 High Byte
8Bh Timer/Counter 1 Low Byte
8Dh Timer/Counter 1 High Byte
A6h Watchdog Timer Reset
GATE1
C/T1#
GATE0
C/T0#
TH0
TL1
TH1
WDTRST
WDTPRG
A7h Watchdog Timer Program
-
-
-
-
-
WTO2
WTO1
WTO0
31
4341D–MP3–04/05
ATMEL [ ATMEL ]
