2 agu programming model, Agu programming model -34 – Freescale Semiconductor StarCore SC140 User Manual
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SC140 DSP Core Reference Manual
Address Generation Unit
2.3.2 AGU Programming Model
The programming model of the AGU is shown in Figure 2-13.
The address registers can be programmed for linear addressing, modulo addressing (regular or multiple
wrap-around), and reverse-carry addressing.
Automatic updating of address registers is available when
using address register indirect addressing.
Figure 2-13. AGU Programming Model
ADDRESS REGISTERS
OFFSET, MODIFIER, and MCTL REGISTERS
0
31
N0
N1
0
31
N2
N3
R0
R2
R3
R1
R4
R5
R6
R7
SP (NSP, ESP)
0
31
M0
M1
M2
MCTL
M3
ADDRESS REGISTERS / BASE ADDRESS REGISTERS
0
31
R8 / B0
R10 / B2
R11 / B3
R9 / B1
R12 / B4
R13 / B5
R14 / B6
R15 / B7