saa7207h NXP Semiconductors, saa7207h Datasheet - Page 6

• Manufacturer Part Number: saa7207h
• Description: Reed Solomon Decoder Ic
• Manufacturer: NXP Semiconductors

FUNCTIONAL DESCRIPTION
Input interface (see Fig.3)
The received input data stream is a sequence which is interpreted as a stream of bytes. The bits are assumed to be non-byte aligned and sent in
MSB to LSB order. New data may be present at the input pins on each rising edge of the master clock input (CLK). Valid data is indicated by
VALI = HIGH. When VALI = LOW the data is not valid and will be neglected. There are no limitations imposed on valid/non-valid sequences.
The Quadrature Amplitude Modulation (QAM) of the input data is given in Table 1.
Table 1 Quadrature amplitude modulation; note 1
Notes
1. X = don’t care.
2. The numbers given in parenthesis refer to the bit numbers.
SLOT
0
1
2
3
4
5
6
7
DATA1 DATA0
S
S
S
S
S
S
S
S
n-1
n-1
n-1
n-1
n
n
n
n
[7]
[5]
[3]
[1]
[7]
[5]
[3]
[1]
256 QAM
S
S
S
S
S
S
S
S
n-1
n-1
n-1
n-1
n
n
n
n
[6]
[4]
[2]
[0]
[6]
[4]
[2]
[0]
VALI
1
1
1
1
1
1
1
1
DATA1 DATA0
S
S
S
S
S
S
n-1
n-1
n-1
n
n
n
X
X
[5]
[3]
[1]
[5]
[3]
[1]
64 QAM
S
S
S
S
S
S
n-1
n-1
n-1
n
n
n
X
X
[4]
[2]
[0]
[4]
[2]
[0]
QUADRATURE AMPLITUDE MODULATION
VALI
1
1
1
0
1
1
1
0
DATA1 DATA0
S
S
S
S
S
n-1
n-1
n-1
n
n
X
X
X
[3]
[1]
[4]
[2]
[0]
32 QAM
S
S
S
S
S
n-1
n-1
n
n
n
X
X
X
[4]
[2]
[0]
[3]
[1]
VALI
1
1
0
0
1
1
1
0
DATA1 DATA0
S
S
S
S
n-1
n-1
n
n
X
X
X
X
[3]
[1]
[3]
[1]
(2)
16 QAM
S
S
S
S
n-1
n-1
n
n
X
X
X
X
[2]
[0]
[2]
[0]
VALI
1
1
0
0
1
1
0
0
DATA1 DATA0
S
S
n-1
n
X
X
X
X
X
X
[1]
[1]
4 QAM
S
S
n-1
n
X
X
X
X
X
X
[0]
[0]
VALI
1
0
0
0
1
0
0
0