Datasheet

32
4341H–MP3–10/07
AT8xC51SND2C/MP3B
Note: 1. FCON register is only available in AT89C51SND2C product.
IPL1 B2h Interrupt Priority Control Low 1 - IPLUSB - IPLKB IPLADC IPLSPI IPLI2C IPLMMC
Table 8-4. Interrupt SFRs (Continued)
Mnemonic Add Name 7 6 5 4 3 2 1 0
Table 8-5. Port SFRs
Mnemonic Add Name 7 6 5 4 3 2 1 0
P0 80h 8-bit Port 0
P2 A0h 8-bit Port 2
P3 B0h 8-bit Port 3
P4 C0h 4-bit Port 4 - - - -
Table 8-6. Auxiliary SFRs
Mnemonic Add Name 7 6 5 4 3 2 1 0
AUXCON 90h Auxiliary Control SDA SCL -
AUDCDOU
T
AUDCDIN
AUDCCL
K
AUDCCS KIN0
Table 8-7. 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 8-8. 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
Table 8-9. MP3 Decoder SFRs
Mnemonic Add Name 7 6 5 4 3 2 1 0
MP3CON AAh MP3 Control MPEN MPBBST CRCEN MSKANC MSKREQ MSKLAY MSKSYN MSKCRC
MP3STA C8h MP3 Status MPANC MPREQ ERRLAY ERRSYN ERRCRC MPFS1 MPFS0 MPVER
MP3STA1 AFh MP3 Status 1 - - - MPFREQ MPBREQ - - -