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4.5.1. PrimeCell Modifications

The AACI PrimeCell in the Southbridge has a different FIFO depth than the standard PL041. Therefore, the AACIPeriphID3 register contains the values listed in Table 4.30.

Figure 4.24. AACI ID register

Figure 4.24. AACI ID register

Table 4.30. Modified AACI PeriphID3 register
BitAccessDescription
[31:8]Write as zeros, read is undefinedUndefined
[7:6]Read-modify-write to preserve value

Reserved

[5:3]Read-only

FIFO depth in compact mode

b000 8
b001 16
b010 32
b011 64
b100 128
b101 256
b110 512 (default)
b111 1024
[2:0]Read-only

number of channels

b000 4
b001 1 (default)
b010 2
b011 3
b100 4
b101 5
b110 6
b111 7

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