Datasheet

31
AT8xC51SND1C
4109E–8051–06/03
Note: 1. FCON register is only available in AT89C51SND1C product.
Table 34. Port SFRs
MnemonicAddName 76543210
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
P5D8h4-bit Port 5 ----
Table 35. Flash Memory SFR
MnemonicAddName 76543210
FCON
(1)
D1h Flash Control FPL3 FPL2 FPL1 FPL0 FPS FMOD1 FMOD0 FBUSY
Table 36. Timer SFRs
MnemonicAddName 76543210
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 -----WTO2WTO1WTO0