SAA2501 Datasheet, PDF (41/52 Pages) NXP Semiconductors – Digital Audio Broadcast DAB decoder

Philips Semiconductors
Digital Audio Broadcast (DAB) decoder
Preliminary specification
SAA2501
The 3 mentioned options are all illustrated in Table 41, where a data item transfer is interrupted between the reading of
the n^th and (n + 1)^th data item byte.
Table 41 Example of 3 options to increase the timing accuracy of the APU coefficient writing
L3DATA⁽¹⁾
DDDDDDDD
01100010
00000110
01100000
DDDDDDDD
DDDDDDDD
DDDDDDDD
DDDDDDDD
DDDDDDDD
DDDDDDDD
DDDDDDDD
DDDDDDDD
01100010
00000111
01100011
SSSSSSSS
01100001
DDDDDDDD
etc.
TRANSFER
SOURCE
SAA2501
host
host
host
host
host
host
host
host
host
host
host
host
host
host
SAA2501
host
SAA2501
etc.
L3MODE
1
0
1
0
1
1
1
1
1
1
1
1
0
1
0
1
0
1
etc.
EXPLANATION
read n^th item data byte
indicate ‘write control’ transfer
write ‘write APU coefficients’ control byte
indicate ‘write item data’ transfer
write APU coefficient LL
write APU coefficient LR
write APU coefficient RL
write APU coefficient RR
write APU coefficient LL
write APU coefficient LR
write APU coefficient RL
write APU coefficient RR
indicate ‘write control’ transfer
write ‘continue previous transfer’ control byte
indicate ‘read status’ transfer
read status; repeat this step until L3RDY = 1
indicate ‘read item data’ transfer
read (n + 1)^th item data byte
etc.
Note
1. Explanation of bytes:
a) DDDDDDDD = data byte.
b) SSSSSSSS = status byte.
January 1995
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