tda5235 Infineon Technologies Corporation, tda5235 Datasheet - Page 58

• Manufacturer Part Number: tda5235
• Description: Enhanced Sensitivity Double-configuration Receiver With Digital Baseband Processing
• Manufacturer: Infineon Technologies Corporation

8-Bit Extended Mode: As two correlators of up to 16 chips length each
working simultaneously in parallel, with matching information insertion
This bit is inserted at the beginning of the payload. “0” is inserted, when correlator A has
matched and “1” when correlator B has matched. The payload length for these two TSI
Pattern may be different.
Figure 29
8-Bit Gap Mode: As two sequentially working correlators of up to 16 chips
length each
This mode is only used in combination with the TSI Gap Mode shown below!
This mode is used to define a gap between the two patterns which is preset in the
x_TSIGAP register. To identify exactly the beginning of the gap it would be helpful on
occasion to place the first CV of the gap into the TSI Pattern A. In this case, the gap
length needed for the x_TSIGAP register must be shortened and the x_TVWIN length
must be extended.
Figure 30
Data Sheet
x_TSILENA = 8d, x_TSILENB = 12d
TSIGRSYN = 1
Incoming Pattern
Manchester Coded
TSI Pattern Match
FSYNC
Data into FIFO
x_TSILENA = 16d, x_TSILENB = 6d
Incoming Pattern
Manchester Coded
TSI Pattern B Match
FSYNC
Data into FIFO
8-Bit Extended TSI Mode
8-Bit Gap TSI Mode
0 0 0 0
RunIn
0 1 0 1 0 1 0 1 0 1 1 0 0 1 0 0 0 0 0 0 0 1 0 1 0 1 0 1 1 0 0 1 0 1 0 1 1 0 1 0 1 0 1 0 1 0 0 1 1 0
0 1 0
0 0 0 0
RunIn
0
7
1 1
6
S
x_TSIPTA
5 4 3 2 1 0
0 1 0 1 0 1 0 1 0 1 1 0 0 1 1 0 0 1 1 0 0 1 0 1 1 0 0 1
0 0
Gap
1
0 1 0 1 0 1 0 0 1 0
0 0
0 0 0 0
Matching Information inserted
58
RunIn
0
5 4 3 2 1 0
x_TSIPTB
1 1
0 0
1 0 0 0 1 1 1 1 1 0 1
1
1
1110 9 8
1 0 1 1 1 1
1 0 1 0 0 1 0
0
x_TSIPTB
7
0 0
6
Functional Description
5 4 3 2 1 0
0 1 0
1
V1.0, 2010-02-19
1
1 0 1
TDA5235