CS6150 Amphion Semiconductor Ltd., CS6150 Datasheet - Page 8

• Manufacturer Part Number: CS6150
• Description: Motion JPEG Decoder
• Manufacturer: Amphion Semiconductor Ltd.

8
The PValue[15:0] output port enables the various parameters
extracted from the input JPEG data stream and currently
used by the core to be read. The data available on the PValue
port is for information only and does not contain control sig-
nals for the decoder core. The desired parameter is selected
Figure 8: Parameter (PValue) Output Timing
For diagnostic purposes the output test data port TData[10:0]
enables either the DCT coefficients or the quantized DCT
coefficients to be displayed, selected by the value of TType.
The test port operates independently of the normal system
operation. Test data output is accompanied by two status sig-
nals [TSOS, TSOB] which indicate the first output byte of the
Figure 9: Test Data Output Timing
SigSOS (O)
PValue (O)
TValid (O)
TSOS (O)
TSOB (O)
TData (O)
PValid (O)
TType (I)
PType (I)
CS6150
CLK (I)
CLK (I)
QDCT Output
as SigSOS is not asserted
Invalid Loading Headers
M o t i o n J P E G D e c o d e r
0
PARAMETER DATA OUTPUT PORT
1
TEST DATA OUTPUT PORT
DCT Output
63
first 8x8 block of the test data (TSOS) and the first output byte
of each 8x8 block of test data (TSOB).
Figure 9 illustrates the functional timing for the test data out-
put interface. It shows the following points:
using the input PType. These parameters are only available
after the SigSOS output has been asserted.
Figure 8 shows the functional timing for the parameter inter-
face. It shows the following points:
• The PValid output is asserted
• The SigSOS output (asserted
• The PType input specifies the
• The TType input specifies the
• The TSOS output is asserted for
• The TSOB output is asserted
• The TValid output is asserted
when valid coding parameters
are available on the PValue
output port.
for one cycle and indicating the
start of an image scan) indicates
that the parameter values for a
particular scan are available.
type of parameter required. It
causes the appropriate value
of the parameter to be clocked
out on the PValue port.
type of test data required. This
can be either DCT coefficients,
set to ‘0’, or quantized DCT
coefficients, set to ‘1’. It is active
on a cycle per cycle basis.
one cycle to indicate the first out-
put byte of the first 8x8 block of
the test data.
for one cycle to indicate the first
output byte of each 8x8 block
of test data.
when valid test data is available
on the TData output port.