TAS3108DCPR datasheet(34/63 Pages) TI1

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TAS3108, TAS3108IA

AUDIO DIGITAL SIGNAL PROCESSORS

SLES152B – OCTOBER 2005 – REVISED NOVEMBER 2007

Table 6-5. TAS3108/TAS3108IA Memory Block Structures

STARTING

DATA BLOCK FORMAT

SIZE

NOTES

BYTE

12-Byte Header Block

Checksum code MS byte

2 bytes

Checksum of bytes 2 through N + 12

Checksum code LS byte

Header ID byte 1 = 0x00

2 bytes

Must be 0x001F for the TAS3108/TAS3108IA to load

Header ID byte 2 = 0x1F

Memory to be loaded

1 byte

0x00 Microprocessor program memory or termination

header

0x01 Microprocessor external data memory

0x02 Audio DSP core program memory

0x03 Audio DSP core coefficient memory

0x04 Audio DSP core data memory

0x05–0x0F Reserved for future expansion

0x00

1 byte

Unused

Start TAS3108/TAS3108IA memory address MS

2 bytes

If this is a termination header, this value is 0000.

byte

Start TAS3108/TAS3108IA memory address LS byte

Total number of bytes transferred MS byte

2 bytes

12 + data bytes + last checksum bytes. If this is a

termination header, this value is 0000.

Total number of bytes transferred LS byte

0x00

1 bytes

Unused

0x00

1 bytes

Unused

Data Block for Microprocessor Program or Data Memory (Following 12-Byte Header)

Data byte 1 (LS byte)

4 bytes

1–4 microprocessor bytes

Data byte 2

Data byte 3

Data byte 4 (MS byte)

Data byte 5

4 bytes

5–8 microprocessor bytes

Data byte 6

Data byte 7

Data byte 8

•

N + 8

Data byte 4*(Z – 1) + 1

4 bytes

Data byte 4*(Z – 1) + 2

Data byte 4*(Z – 1) + 3

Data byte 4*(Z – 1) + 4 = N

N + 12

0x00

4 bytes

Repeated checksum bytes 2 through N + 11

0x00

Checksum code MS byte

Checksum code LS byte

Data Block for Audio DSP Core Coefficient Memory (Following 12-Byte Header)

Data byte 1 (LS byte)

4 bytes

Coefficient word 1 (valid data in D27–D0) D7–D0

Data byte 2

D15–D8

Data byte 3

D23–D16

Data byte 4 (MS byte)

D31–D24

Microprocessor Controller

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