2 special function registers, Figure 4-2. register map, Figure 4-3. scratchpad register addressing – Maxim Integrated High-Speed Microcontroller User Manual
Page 17
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.7 SP.6 SP.5 SP.4 SP.3 SP.2 SP.1 SP.0 81h
DPL.7 DPL.6 DPL.5 DPL.4 DPL.3 DPL.2 DPL.1 DPL.0
82h
DPH.7 DPH.6 DPH.5 DPH.4 DPH.3 DPH.2 DPH.1 DPH.0
83h
DPL1.7 DPL1.6 DPL1.5 DPL1.4 DPL1.3 DPL1.2 DPL1.1 DL1H.0
84h
DPH1.7
DPH1.6 DPH1.5 DPH1.4 DPH1.3 DPH1.2 DPH1.1 DPH1.0
85h
0 0 0 0 0 0 0
SEL
86h
SMOD_0 SMOD0
—
—
GF1
GF0
STOP IDLE
87h
TF1 TR1 TF0 TR0 IE1 IT1 IE0 IT0 88h
GATE C/
T
M1 M0
GATE
C/
T M1 M0 89h
TL0.7 TL0.6 TL0.5 TL0.4 TL0.3 TL0.2 TL0.1 TL0.0 8Ah
TL1.7 TL1.6 TL1.5 TL1.4 TL1.3 TL1.2 TL1.1 TL1.0 8Bh
TH0.7 TH0.6 TH0.5 TH0.4 TH0.3 TH0.2 TH0.1 TH0.0 8Ch
TH1.7 TH1.6 TH1.5 TH1.4 TH1.3 TH1.2 TH1.1 TH1.0 8Dh
— — T2M T1M T0M MD2 MD1 MD0 8Eh
P1.7 P1.6 P1.5 P1.4 P1.3 P1.2 P1.1 P1.0 90h
IE5 IE4 IE3 IE2 — — — — 91h
SM0/FE_0 SM1_0 SM2_0 REN_0 TB8_0 RB8_0 TI_0
RI_0
98h
SBUF0.7 SBUF0.6 SBUF0.5 SBUF0.4 SBUF0.3 SBUF0.2 SBUF0.1 SBUF0.0
99h
P2.7 P2.6 P2.5 P2.4 P2.3 P2.2 P2.1 P2.0 A0h
EA — ET2 ES0 ET1 EX1 ET0 EX0 A8h
SADDR0.7 SADDR0.6 SADDR0.5 SADDR0.4 SADDR0.3 SADDR0.2 SADDR0.1 SADDR0.0
A9h
P3.7 P3.6 P3.5 P3.4 P3.3 P3.2 P3.1 P3.0 B0h
— — PT2 PS0 PT1 PX1 PT0 PX0 B8h
SADEN0.7 SADEN0.6 SADEN0.5 SADEN0.4 SADEN0.3 SADEN0.2 SADEN0.1 SADEN0.0
B9h
0
HIP
LIP 1 1 1 1 1 C5h
TF2 EXF2 RCLK
TCLK
EXEN2 TR2 C/
T2
CP/
RL2
C8h
— — — — — —
T2OE
DCEN
C9h
RCAP2L.7 RCAP2L.6 RCAP2L.5 RCAP2L.4 RCAP2L.3 RCAP2L.2 RCAP2L.1 RCAP2L.0
CAh
RCAP2H.7 RCAP2H.6 RCAP2H.5 RCAP2H.4 RCAP2H.3 RCAP2H.2 RCAP2H.1 RCAP2H.0
CBh
TL2.7 TL2.6 TL2.5 TL2.4 TL2.3 TL2.2 TL2.1 TL2.0 CCh
TH2.7 TH2.6 TH2.5 TH2.4 TH2.3 TH2.2 TH2.1 TH2.0 CDh
CY AC F0 RS1 RS0 OV F1 P D0h
— POR — — — — — — D8h
ACC.7 ACC.6 ACC.5 ACC.4 ACC.3 ACC.2 ACC.1 ACC.0
E0h
— — — — EX5
EX4
EX3
EX2 E8h
B.7 B.6 B.5 B.4 B.3 B.2 B.1 B.0 F0h
— — — — PX5
PX4 PX3 PX2 F8h