U2739M-B Datasheet, PDF (63/69 Pages) ATMEL Corporation – DAB One-Chip Channel- and Source Decoder

U2739M-B
8.4.7 Read FIC Data
Command Overview:
D Get FIB bytes
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
1
0
0
1
FIBNUM
$9X
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
FIB0
$XX
...
FIB31
$XX
Command Parameters:
Parameter
Meaning
FIBNUM
FIB number n
FIBm
FIB byte m
Description
Possible FIB numbers DAB mode dependent:
0..11 (DAB mode 1)
0..2 (DAB mode 2)
0..3 (DAB mode 3)
0..5 (DAB mode 4)
Each FIB consists of 32 bytes. The order of the FIB bytes and bits corresponds
to the serial FIC processing. That means:
(1) Byte order:
The first 8 output bits after FIC processing represent FIB byte 0 of FIB num-
ber 0, the next ones FIB byte 1 of FIB number 0 and so on.
(2) Bit order:
The FIB bytes are given out MSB first. The first outgoing bit represents bit 7
of the corresponding byte, the next one bit 6 and so on. The FIB bits are num-
bered from bit 0 (MSB of FIB0) up to bit 255 (LSB of FIB31).
NOTE:
The last 2 bytes of an FIB represent the result of the U2739M internal CRC
check. That means, if these bytes are $00 both, the internal CRC check was
successful and the FIB data bytes are correct.
Rev. A1, 22-May-01
63 (69)