U2739M-B Datasheet, PDF (58/69 Pages) ATMEL Corporation – DAB One-Chip Channel- and Source Decoder

U2739M-B
8.4.2 Read X–PAD
Command Overview:
D Get MPEG ancillary data (X–PAD)
Address Mode
7
6
5
4
3
2
1
0
0
1
1
0
1
1
1
1
DAB
U2739M-B
Write Command
Command
sequence:
$6F
Data Mode
7
6
5
4
3
2
1
0
0
1
0
1
0
XPNUM
$5X
Address Mode
7
6
5
4
3
2
1
0
0
1
1
0
1
1
0
1
DAB
U2739M-B
Write Command
$6D
Data Mode
7
6
5
4
3
2
1
0
X–PAD0
$XX
...
X–PAD31
$XX
Command Parameters:
Parameter
XPNUM
X–PADm
Meaning
X–PAD block number n
(n from 1..5)
X–PAD byte m
Read RFU
Description
The maximum X–PAD capacity supported by the U2739M-B is 64kbit/s.
The access is splitted into 6 blocks (numbered 1..5) of 32 bytes.
The blocks are time aligned, that means block 1 is the first block in an
MPEG frame after audio samples.
Byte 0 is the first byte of block n, byte 31 the last one. It is followed by
the first one of block n+1.
Use MC command “RFU” to read block 6
58 (69)
Rev. A1, 22-May-01