CS3110 Amphion, CS3110 Datasheet - Page 6

• Manufacturer Part Number: CS3110
• Description: Reed-solomon RS Encoder (DVB)
• Manufacturer: Amphion

The CS3110 and CS3112 encoders support a wide range of
applications and are fully compliant with the European DVB
Standards ETS 300-421 and ETS 300-429 (CS3110) or Intelsat
IESS
polynomial for the European DVB standards is:
g(x)=(x+1)(x+a)(x+a
Reed-Solomon primitive polynomial is:
f(x)=x
Equivalently, for Intelsat the Reed-Solomon Generator
polynomial is:
g(x)=(x+a
with a Reed-Solomon primitive polynomial of
Most inputs and outputs to the encoders are registered and fully synchronous. Full pin descriptions and conditional timing
behavior for non-registered pins are given in the CS3110/CS3112 databook. Functional timing characteristics are given in Figure 3
with example characteristics in Table 3. Timing characteristics are technology dependent and will vary by instantiation as signal
loading in the target system determines final timing.
CS6190TK: All values reflect pre-layout estimated timing. Wireloading conditions use “Conservative” model supplied by model supplied by library vendor and worst
case commercial operating conditions.
6
CS3110/12
SYMBOL
8
t
+x
skew
t
308/309
t
t
cyc
t
su
co
h
4
120
+x
)(x+a
3
+x
DEFINITION OF RS CODE IMPLEMENTED IN THE CS3110/CS3112
2
+1.
(CS3112).
121
2
). . .(x+a
). . .(x+a
Input port set-up time
Input port hold time
Clock Cycle Rate
DESCRIPTION
Output port clock
to output timing
Clock skew
120+(2t-1)
(2t-1)
The
), where a is 02
Reed-Solomon Encoders
Reed-Solomon
)
Table 3: Encoder Timing Characteristics
TIMING CHARACTERISTICS
HEX
Generator
and the
CONDITION
Worst case
Worst case
max
min
f(x)=x
The core is designed for high performance applications and is
configurable for any valid block length (n = 50-255) and parity
length ((N – K) = 0–20). For ETS 300-421 and ETS 300-429, the
coding parameters are:
(204,188,8)
where the rate is in the format (N, K, t)- n is the codeword
length, k is the message length, t is the error correction
capability and is (N – K)/2.
8
+x
7
+x
2
+x+1
VALUE
2.99ns
200ps
0.7ns
5ns
0ns
Positive edge triggered
Synthesis Value
COMMENT