CS6150 Amphion Semiconductor Ltd., CS6150 Datasheet - Page 5

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

Table 1: I/O Signal Description (Continued from page 4)
Table 2: Memory Block Size Information
STATUS AND CONTROL
MEMORY BLOCK
SIGNAL
DecFlags
Quantization Tables
Transpose Memory
SigSOS
InitProg
PValue
Decoder Memory
TblDef
PType
PValid
HuffmanTables
Run-Length
(HTMem)
(TRMem)
(QTMem)
(RLMem)
WIDTH
(BITS)
PORT
16
4
1
1
8
1
8
CONFIGURATION
Output
Output
Output
Output
Output
Output
Input
(WORDS X BITS)
I/O
384x8
64x15
512x8
64x22
Parameter Type
Signal specifying parameters
to be placed on port PValue
Parameter Value
Decoding parameter bus
Parameter Valid
Indicates valid coding parameters
Signal Start of Scan
Indicates that an SOS segment has
been input via JpgIn input and the
decoder is about to start decoding
a scan
Decoder Flags
CS6150 internal status and
error flag status register
Initialization In Progress
Indicates that the CS6150 is currently
initializing its initial memories
Tables Defined
Indicates number of tables defined.
Bits[7:4] indicate Huffman tables.
Bits[3:0] indicate quantization tables,
1bit/table
DESCRIPTION
Single Port, synchronous
Single Port, synchronous
Dual Port, synchronous
Dual Port, synchronous
PORTS
Following the assertion of the reset signal (RSTn) the
core enters the Initialization state for 384 clock cycles.
During this period the internal memories are initial-
ized. After exiting the Initialization state the core
enters the Idle state.
The core enters the Idle state after exiting Initialization
state or after the assertion of CLR. It also enters Idle
state after processing an EOI whilst in the Marker
Decode state.
The core remains in the Idle state until being presented
with the first byte of a JPEG stream on port JpgIn. If
the core exits Idle state due to an input on port JpgIn
it enters either Marker Decode state.
The major operating modes and states of the CS6150
are shown in Figure 4.
Figure 4: CS6150 Decoder States
STATE DESCRIPTIONS
INITIALIZATION
Entropy Decode
Marker Decode
Inititialization
IDLE STATE
Reset
1
Idle
2
KEY
1 SOS Input
2 EOI Input
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