Manual

High-Speed Microcontroller User’s Guide
Rev: 062210 17 of 176
4.2 Special Function Registers
The high-speed microcontroller, like the 8051, uses special function registers (SFRs) to control
peripherals and modes. In many cases, an SFR will control individual functions or report status on
individual functions. The SFRs reside in register locations 80h–FFh and are reached using direct
addressing. SFRs that end in 0 or 8 are bit addressable.
All standard SFR locations from the original 8051 are duplicated in the high-speed microcontroller, with
several additions. Following tables illustrate the locations of the SFRs for various devices. Following
each tables a description of the default-reset conditions of all SFR bits. The following information
contains detailed descriptions of each SFR.
Table 4-A. DS80C310 SFR Locations
REGISTER BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0 ADDRESS
SP SP.7 SP.6 SP.5 SP.4 SP.3 SP.2 SP.1 SP.0 81h
DPL DPL.7 DPL.6 DPL.5 DPL.4 DPL.3 DPL.2 DPL.1 DPL.0 82h
DPH DPH.7 DPH.6 DPH.5 DPH.4 DPH.3 DPH.2 DPH.1 DPH.0 83h
DPL1 DPL1.7 DPL1.6 DPL1.5 DPL1.4 DPL1.3 DPL1.2 DPL1.1 DL1H.0 84h
DPH1 DPH1.7 DPH1.6 DPH1.5 DPH1.4 DPH1.3 DPH1.2 DPH1.1 DPH1.0 85h
DPS 0 0 0 0 0 0 0 SEL 86h
PCON SMOD_0 SMOD0 — — GF1 GF0 STOP IDLE 87h
TCON TF1 TR1 TF0 TR0 IE1 IT1 IE0 IT0 88h
TMOD GATE C/T M1 M0 GATE C/T M1 M0 89h
TL0 TL0.7 TL0.6 TL0.5 TL0.4 TL0.3 TL0.2 TL0.1 TL0.0 8Ah
TL1 TL1.7 TL1.6 TL1.5 TL1.4 TL1.3 TL1.2 TL1.1 TL1.0 8Bh
TH0 TH0.7 TH0.6 TH0.5 TH0.4 TH0.3 TH0.2 TH0.1 TH0.0 8Ch
TH1 TH1.7 TH1.6 TH1.5 TH1.4 TH1.3 TH1.2 TH1.1 TH1.0 8Dh
CKCON — — T2M T1M T0M MD2 MD1 MD0 8Eh
P1 P1.7 P1.6 P1.5 P1.4 P1.3 P1.2 P1.1 P1.0 90h
EXIF IE5 IE4 IE3 IE2 — — — — 91h
SCON0 SM0/FE_0 SM1_0 SM2_0 REN_0 TB8_0 RB8_0 TI_0 RI_0 98h
SBUF0 SBUF0.7 SBUF0.6 SBUF0.5 SBUF0.4 SBUF0.3 SBUF0.2 SBUF0.1 SBUF0.0 99h
P2 P2.7 P2.6 P2.5 P2.4 P2.3 P2.2 P2.1 P2.0 A0h
IE EA — ET2 ES0 ET1 EX1 ET0 EX0 A8h
SADDR0 SADDR0.7 SADDR0.6 SADDR0.5 SADDR0.4 SADDR0.3 SADDR0.2 SADDR0.1 SADDR0.0 A 9 h
P3 P3.7 P3.6 P3.5 P3.4 P3.3 P3.2 P3.1 P3.0 B0h
IP — — PT2 PS0 PT1 PX1 PT0 PX0 B8h
SADEN0 SADEN0.7 SADEN0.6 SADEN0.5 SADEN0.4 SADEN0.3 SADEN0.2 SADEN0.1 SADEN0.0 B 9 h
STATUS 0 HIP LIP 1 1 1 1 1 C5h
T2CON TF2 EXF2 RCLK TCLK EXEN2 TR2 C/T2 CP/RL2 C8h
T2MOD — — — — — — T2OE DCEN C9h
RCAP2L RCAP2L.7 RCAP2L.6 RCAP2L.5 RCAP2L.4 RCAP2L.3 RCAP2L.2 RCAP2L.1 RCAP2L.0 CAh
RCAP2H RCAP2H.7 RCAP2H.6 RCAP2H.5 RCAP2H.4 RCAP2H.3 RCAP2H.2 RCAP2H.1 RCAP2H.0 CB h
TL2 TL2.7 TL2.6 TL2.5 TL2.4 TL2.3 TL2.2 TL2.1 TL2.0 CCh
TH2 TH2.7 TH2.6 TH2.5 TH2.4 TH2.3 TH2.2 TH2.1 TH2.0 CDh
PSW CY AC F0 RS1 RS0 OV F1 P D0h
WDCON — POR — — — — — — D8h
ACC ACC.7 ACC.6 ACC.5 ACC.4 ACC.3 ACC.2 ACC.1 ACC.0 E0h
EIE — — — — EX5 EX4 EX3 EX2 E8h
B B.7 B.6 B.5 B.4 B.3 B.2 B.1 B.0 F0h
EIP — — — — PX5 PX4 PX3 PX2 F8h