DS80C320-MCG Datasheet, PDF (20/175 Pages) Dallas Semiconductor – High-Speed Microcontroller User Guide

Data Pointer High 0 (DPH)
7
6
5
SFR 83h DPH.7 DPH.6 DPH.5
RW-0 RW-0 RW-0
4
DPH.4
RW-0
High-Speed Microcontroller User’s Guide
3
DPH.3
RW-0
2
DPH.2
RW-0
1
DPH.1
RW-0
0
DPH.0
RW-0
R=Unrestricted Read, W=Unrestricted Write, -n=Value after Reset
DPH.7-0
Bits 7-0
Data Pointer High 0. This register is the high byte of the standard 80C32 16-bit
data pointer. DPL and DPH are used to point to non-scratchpad data RAM.
Data Pointer Low 1 (DPL1)
7
6
5
SFR 84h DPL1.7 DPL1.6 DPL1.5
RW-0 RW-0 RW-0
4
DPL1.4
RW-0
3
DPL1.3
RW-0
2
DPL1.2
RW-0
1
DPL1.1
RW-0
0
DL1H.0
RW-0
R=Unrestricted Read, W=Unrestricted Write, -n=Value after Reset
DPL1.7-0
Bits 7-0
Data Pointer Low 1. This register is the low byte of the auxiliary 16-bit data
pointer. When the SEL bit (DPS.0) is set, DPL1 and DPH1 are used in place of
DPL and DPH during DPTR operations.
Data Pointer High 1 (DPH1)
Data
7
6
5
Pointer
High 1
(DPH1)
SFR 85h DPH1.7 DPH1.6 DPH1.5
RW-0 RW-0 RW-0
4
DPH1.4
RW-0
3
2
DPH1.3 DPH1.2
RW-0 RW-0
1
0
DPH1.1 DPH1.0
RW-0 RW-0
R=Unrestricted Read, W=Unrestricted Write, -n=Value after Reset
DPH1.7-0
Bits 7-0
Data Pointer High 1. This register is the high byte of the auxiliary 16-bit data
pointer. When the SEL bit (DPS.0) is set, DPL1 and DPH1 are used in place of
DPL and DPH during DPTR operations.
Data Pointer Select (DPS)
7
6
5
4
3
2
1
0
SFR 86h
0
0
0
0
0
0
0
SEL
R-0
R-0
R-0
R-0
R-0
R-0
R-0
RW-0
R=Unrestricted Read, W=Unrestricted Write, -n=Value after Reset
Bits 7-0
SEL
Bit 0
Reserved. These bits will read 0.
Data Pointer Select. This bit selects the active data pointer.
0 = Instructions that use the DPTR will use PDL and PDH.
1= Instructions that use the DPTR will use PDL1 and PDH1.
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