Texas Instruments TMS320C2XX - Manual (Page 57)

Auxiliary Register Arithmetic Unit (ARAU)
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3.4 Auxiliary Register Arithmetic Unit (ARAU)
The CPU also contains the auxiliary register arithmetic unit (ARAU), an arith-
metic unit independent of the central arithmetic logic unit (CALU). The main
function of the ARAU is to perform arithmetic operations on eight auxiliary reg-
isters (AR7 through AR0) in parallel with operations occurring in the CALU.
Figure 3–9 shows the ARAU and related logic.
Figure 3–9. ARAU and Related Logic
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Data write bus (DWEB)
ARAU
ARB
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8LSBs
3LSBs
Instruction register
MUX
Data read bus (DRDB)
MUX
ARP
AR0
AR1
AR2
AR3
AR4
AR5
AR6
AR7
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Data-read address bus (DRAB)
Data-write address bus (DWAB)
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