CS3410 Amphion Semiconductor Ltd., CS3410 Datasheet - Page 14

• Manufacturer Part Number: CS3410
• Description: High Speed Viterbi/TCM Decoder
• Manufacturer: Amphion Semiconductor Ltd.

CONTINUOUS AND BLOCK MODE
Continuous or Block Mode operation may be applied when
CS3410 is configured in Viterbi or Trellis Mode.
In Continuous Mode a high value on DVALI indicates valid
input data. DVALO will go high 526 clock cycles (526 clock
cycles = latency of the core) after DVALI has been clocked into
the core. DVALO will indicate when data at the output is valid
as shown in Figure 18.
Figure 19 illustrates the core in Continuous Mode with a
random DVALI signal. Here DVALO goes high for 170 clock
cycles and then low, depending on the nature of the DVALI
signal.
In Block Mode a high value on DVALI indicates valid input
data. BLKSTARTI goes high to indicate the start of a block of
data. After the block length is reached, BLKSTOPI goes high
to signify the end of a block. After the latency of the core has
expired (526 clock cycles, assuming a constant DVALI)
DVALO and BLKSTARTO go high to indicate valid data, and
the start of a decoded block respectively. At the end of a block
BLKSTOPO will go high and DVALO goes low. This is shown
in Figure 20
Figure 19: Continuous Mode Operation with a Variable DVALI Signal
14
CS3410
RESET
DVALO
DVALI
CLK
DO
R0
R1
R2
High Speed Viterbi/TCM Decoder
.
Figure 18: Continuous Mode Operation
DVALO
RESET
DVALI
CLK
DO
R0
R1
R2