CS6350 Amphion, CS6350 Datasheet - Page 2

• Manufacturer Part Number: CS6350
• Description: Inverse DCT (Decoder)
• Manufacturer: Amphion

Table 1 describes the input and output ports (shown
graphically in Figure 2) for the CS6350 High Performance
IDCT core. Unless otherwise stated, all signals are active high
and bit (0) is the least significant bit.
2
CS6350
CLK
CLR
RSTn
DctStrb
DctCoef [10:0]
PixOut [7:0]
PixOutSob
IDctRdy
PixOutValid
Signal
PIN/PORT DESCRIPTION
High Performance IDCT
Input
Input
Input
Input
Input
Output
Output
Output
Output
I/O
Clock signal
Synchronous reset signal
Active low, asynchronous reset signal
Signal to indicate to the core that the first sample in a 8x8 block is available for pro-
cessing. Active '1' pulse for one CLK time period. DctStrb can be left '1' after first
assertion for continuous processing of data blocks. However, in case of any gaps
between successive blocks, it must be asserted along with first data sample of a
block. Re-assertion of DctStrb within a 8x8 block segment has no effect on process-
ing.
11-bit wide DCT coefficient input port. The data is burst in on block by block basis. If
the data sequence is corrupted for any reason, the port will continue to read 64 ele-
ments of an 8x8 block and then wait for the assertion of DctStrb to read next valid
data block.
8-bit wide pixel data output port. The data is burst out on block by block basis in col-
umn-major order.
DC flag. Associated with the first output of an 8x8 block, can also be regarded as
the start signal of the block. Active '1' pulse for one CLK period.
Active '1' signal indicates that the core can read a new block of coefficients. It goes
to a '0' state whenever DctStrb has been asserted.
Active '1' to indicate the availability of a valid output data block. It will remain contin-
uously asserted as long as valid data is available at the PixOut port.
Table 1: I/O Signal Descriptions
Figure 2: CS6350 Core Pinouts
DctCoef[10:0]
DctStrb
RSTn
CLK
CLR
Description
CS6350
IDCT
PixOut[7:0]
PixOutSob
IDctRdy
PixOutValid