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BDM: 0x806 (ACC0)
0x809 (ACC1)
0x80A (ACC2)
0x80B (ACC3)
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9
R
W
Reset – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
Field
31–0
Store 32-bits of the result of the MAC operation.
Accumulator
4.2.4
Accumulator Extension Registers (ACCext01, ACCext23)
Each pair of 8-bit accumulator extension fields are concatenated with the corresponding 32-bit
accumulator register to form the 48-bit accumulator. For more information, see
Description."
BDM: 0x807 (ACCext01)
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9
R
Accumulator 0 Upper
Extension Byte
W
Reset – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
Field
31–24
Accumulator 0 upper extension byte
ACC0U
23–16
Accumulator 0 lower extension byte
ACC0L
15–8
Accumulator 1 upper extension byte
ACC1U
7–0
Accumulator 1 lower extension byte
ACC1L
Freescale Semiconductor
Figure 4-4. Accumulator Registers (ACC0–3)
Table 4-5. ACC0–3 Field Descriptions
Accumulator 0 Lower
Extension Byte
Figure 4-5. Accumulator Extension Register (ACCext01)
Table 4-6. ACCext01 Field Descriptions
MCF52277 Reference Manual, Rev. 1
Enhanced Multiply-Accumulate Unit (EMAC)
Accumulator
Description
Accumulator 1 Upper
Extension Byte
Description
Access: User read/write
BDM read/write
8
7
6
5
4
3
2
1
0
Section 4.3, "Functional
Access: User read/write
BDM read/write
8
7
6
5
4
3
2
1
0
Accumulator 1 Lower
Extension Byte
4-7
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