Register Changes From C2Xlp To C28X - Texas Instruments TMS320C28x Reference Manual

C.2 Registers
Figure C−1. Register Changes From C2xLP to C28x
†
On the C2xLP, IMR and IFR were memory mapped. On the C28x, they are registers.
The register modifications to the C2xLP are shown in Figure C−1. Registers
that are shaded show the changes or enhancements on the C28x. The itali-
cized names on the left are the original C2xLP names for the registers. The
names on the right are the C28x names for the registers.
32 bits
16
C2xLP
bits
Names
TREG T or TH
PREG PH
ACC AH
DP
AR0 AR0H
AR1H
AR1
AR2 AR2H
AR3H
AR3
AR4H
AR4
AR5H
AR5
AR6H
AR6
AR7H
AR7
PC
IMR †
IFR †
ST0
ST1
16
C28x
bits
Names
TL XT
PL P
AL ACC
SP
9 DP
AR0 XAR0
AR1 XAR1
AR2 XAR2
AR3 XAR3
AR4 XAR4
AR5 XAR5
AR6 XAR6
AR7 XAR7
PC
RPC
22 bits
IER
DBGIER
IFR
ST0
ST1
C2xLP and C28x Architectural Differences
Registers
C-3