Rainbow Electronics AT89C5132 - Manual (Page 31)

31
AT8xC5132
4173A–8051–08/02
Special Function
Registers
The Special Function Registers (SFRs) of the AT8xC5132 derivatives fall into the cate-
gories detailed in Table 30 to Table 45. The relative addresses of these SFRs are
provided together with their reset values in Table 46. In this table, the bit-addressable
registers are identified by Note 1.
Table 30. C51 Core SFRs
Mnemonic Add Name 7 6 5 4 3 2 1 0
ACC E0h Accumulator – – – – – – – –
B F0h B Register – – – – – – – –
PSW D0h Program Status Word CY AC F0 RS1 RS0 OV F1 P
SP 81h Stack Pointer – – – – – – – –
DPL 82h Data Pointer Low byte – – – – – – – –
DPH 83h Data Pointer High byte – – – – – – – –
Table 31. System Management SFRs
Mnemonic Add Name 7 6 5 4 3 2 1 0
PCON 87h Power Control SMOD1 SMOD0 – – GF1 GF0 PD IDL
AUXR 8Eh Auxiliary Register 0 – EXT16 M0 DPHDIS XRS1 XRS0 EXTRAM AO
AUXR1 A2h Auxiliary Register 1 – – ENBOOT – GF3 0 – DPS
NVERS FBh Version Number NV7 NV6 NV5 NV4 NV3 NV2 NV1 NV0
Table 32. PLL and System Clock SFRs
Mnemonic Add Name 7 6 5 4 3 2 1 0
CKCON 8Fh Clock Control – – – – – – – X2
PLLCON E9h PLL Control R1 R0 – – PLLRES v PLLEN PLOCK
PLLNDIV EEh PLL N Divider – N6 N5 N4 N3 N2 N1 N0
PLLRDIV EFh PLL R Divider R9 R8 R7 R6 R5 R4 R3 R2
Table 33. Interrupt SFRs
Mnemonic Add Name 7 6 5 4 3 2 1 0
IEN0 A8h Interrupt Enable Control 0 EA EAUD – ES ET1 EX1 ET0 EX0
IEN1 B1h Interrupt Enable Control 1 – EUSB – EKB EADC ESPI EI2C EMMC
IPH0 B7h Interrupt Priority Control High 0 – IPHAUD – IPHS IPHT1 IPHX1 IPHT0 IPHX0
IPL0 B8h Interrupt Priority Control Low 0 – IPLAUD – IPLS IPLT1 IPLX1 IPLT0 IPLX0
IPH1 B3h Interrupt Priority Control High 1 – IPHUSB – IPHKB IPHADC IPHSPI IPHI2C IPHMMC
IPL1 B2h Interrupt Priority Control Low 1 – IPLUSB – IPLKB IPLADC IPLSPI IPLI2C IPLMMC