At8xc51snd1c – Rainbow Electronics AT89C51SND1C User Manual
Page 31
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31
AT8xC51SND1C
4109E–8051–06/03
Note:
1. FCON register is only available in AT89C51SND1C product.
Table 34. Port SFRs
Mnemonic Add Name
7
6
5
4
3
2
1
0
P0
80h 8-bit Port 0
P1
90h 8-bit Port 1
P2
A0h 8-bit Port 2
P3
B0h 8-bit Port 3
P4
C0h 8-bit Port 4
P5
D8h 4-bit Port 5
-
-
-
-
Table 35. Flash Memory SFR
Mnemonic Add Name
7
6
5
4
3
2
1
0
FCON
(1)
D1h Flash Control
FPL3
FPL2
FPL1
FPL0
FPS
FMOD1
FMOD0
FBUSY
Table 36. Timer SFRs
Mnemonic Add Name
7
6
5
4
3
2
1
0
TCON
88h Timer/Counter 0 and 1 Control
TF1
TR1
TF0
TR0
IE1
IT1
IE0
IT0
TMOD
89h Timer/Counter 0 and 1 Modes
GATE1
C/T1#
M11
M01
GATE0
C/T0#
M10
M00
TL0
8Ah Timer/Counter 0 Low Byte
TH0
8Ch Timer/Counter 0 High Byte
TL1
8Bh Timer/Counter 1 Low Byte
TH1
8Dh Timer/Counter 1 High Byte
WDTRST
A6h Watchdog Timer Reset
WDTPRG
A7h Watchdog Timer Program
-
-
-
-
-
WTO2
WTO1
WTO0
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