Microchip Technology MA330031-2 Data Sheet
2011-2013 Microchip Technology Inc.
DS70000657H-page 37
dsPIC33EPXXXGP50X, dsPIC33EPXXXMC20X/50X AND PIC24EPXXXGP/MC20X
3.5
Programmer’s Model
The programmer’s model for the
dsPIC33EPXXXGP50X, dsPIC33EPXXXMC20X/50X
and PIC24EPXXXGP/MC20X is shown in
dsPIC33EPXXXGP50X, dsPIC33EPXXXMC20X/50X
and PIC24EPXXXGP/MC20X is shown in
All registers in the programmer’s model are memory
mapped and can be manipulated directly by
instructions.
mapped and can be manipulated directly by
instructions.
lists a description of each
register.
In addition to the registers contained in the
programmer’s model, the dsPIC33EPXXXGP50X,
dsPIC33EPXXXMC20X/50X and PIC24EPXXXGP/
In addition to the registers contained in the
programmer’s model, the dsPIC33EPXXXGP50X,
dsPIC33EPXXXMC20X/50X and PIC24EPXXXGP/
MC20X devices contain control registers for Modulo
Addressing (dsPIC33EPXXXMC20X/50X and
dsPIC33EPXXXGP50X devices only), Bit-Reversed
Addressing (dsPIC33EPXXXMC20X/50X and
dsPIC33EPXXXGP50X devices only) and interrupts.
These registers are described in subsequent
sections of this document.
All registers associated with the programmer’s model
are memory mapped, as shown in
Addressing (dsPIC33EPXXXMC20X/50X and
dsPIC33EPXXXGP50X devices only), Bit-Reversed
Addressing (dsPIC33EPXXXMC20X/50X and
dsPIC33EPXXXGP50X devices only) and interrupts.
These registers are described in subsequent
sections of this document.
All registers associated with the programmer’s model
are memory mapped, as shown in
.
TABLE 3-1:
PROGRAMMER’S MODEL REGISTER DESCRIPTIONS
Register(s) Name
Description
W0 through W15
Working Register Array
ACCA, ACCB
40-Bit DSP Accumulators
PC
23-Bit Program Counter
SR
ALU and DSP Engine STATUS Register
SPLIM
Stack Pointer Limit Value Register
TBLPAG
Table Memory Page Address Register
DSRPAG
Extended Data Space (EDS) Read Page Register
DSWPAG
Extended Data Space (EDS) Write Page Register
RCOUNT
REPEAT
Loop Count Register
DCOUNT
(
)
DO
Loop Count Register
DOSTARTH
)
, DOSTARTL
(
,
)
DO
Loop Start Address Register (High and Low)
DOENDH
(
)
, DOENDL
DO
Loop End Address Register (High and Low)
CORCON
Contains DSP Engine, DO Loop Control and Trap Status bits
Note 1:
This register is available on dsPIC33EPXXXMC20X/50X and dsPIC33EPXXXGP50X devices only.
2:
The DOSTARTH and DOSTARTL registers are read-only.