Texas Instruments TMS320C28x, Reference Manual

Page: 36 / 695

CPU Registers
2-6
Figure 2 − 2. C28x Registers
6/7-bit
offset
†
SP[16]
DP[16]
AR0[16]
AR1[16]
AR2[16]
AR3[16]
AR4[16]
AR5[16]
AR6[16]
AR7[16]
AR0H[16]
AR1H[16]
AR2H[16]
AR3H[16]
AR4H[16]
AR5H[16]
AR6H[16]
AR7H[16]
XAR0[32]
XAR1[32]
XAR2[32]
XAR3[32]
XAR4[32]
XAR5[32]
XAR6[32]
XAR7[32]
PC[22]
RPC[22]
ST0[16]
IER[16]
ST1[16]
DBGIER[16]
IFR[16]
T[16]
PH[16]
TL[16]
PL[16]
AL[16] AH[16]
XT[32]
P[32]
ACC[32]
†
A 6-bit offset is used when operating in C28x mode or C27x object-compatible mode.
A 7-bit offset is used when operating in C2xLP source-compatible mode. The least significant
bit of the DP is ignored when operating in this mode.
2.2.1 Accumulator (ACC, AH, AL)
The accumulator (ACC) is the main working register for the device. It is the
destination for all ALU operations except those which operate directly on
memory or registers. ACC supports single-cycle move, add, subtract, and