GC4116 Datasheet, PDF(47/57 Page) List of Unclassifed Manufacturers

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GC4116 Datasheet, PDF (47/57 Pages) List of Unclassifed Manufacturers – MULTI-STANDARD QUAD DUC CHIP

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GC4116 MULTI-STANDARD QUAD DUC CHIP

DATA SHEET REV 1.0

5.11 RESAMPLER COEFFICIENT PAGES (PAGES 32-63)

These pages store the 256 resampler coefficients. Storing resampler coefficient values is similar to storing the coefficients

for the PFIR filters. The resampler coefficients are 12 bits with the 8 LSBs written in one address, and the upper 4 bits written as

the 4 LSBs of the next address. When reading back resampler coefficients the top four bits of the second address always read

back zero.

The resampler coefficient RAM must be written in blocks of eight addresses (four coefficients). Writes to the RAM occur

when a write is done to addresses 23 or 31. Supplying coefficients in sequential order will write correctly to the RAM. If just a

portion of the resampler coefficient RAM is to be updated, then one must write in blocks of the eight addresses 16 to 23, or 24

to 31. Writing to less than eight addresses will either result in no change to the RAM or unknown changes to some coefficients.

TO LOAD A COEFFICIENT THE USER MUST WRITE IN BLOCKS OF FOUR COEFFICIENTS. ONE MUST WRITE TO

ADDRESSES 16-22 THEN ADDRESS 23 OR TO ADDRESSES 24-30 THEN ADDRESS 31.

Table 11: Resampler Coefï¬cient Pages (Single ï¬lter mode)

Address

33 34

h16

h17

h10

h18

h10

h18

h11

h19

h11

h19

h12

h20

h12

h20

h13

h21

h13

h21

h14

h22

h14

h22

h15

h23

h15

h23

35 36 37

h24

h32

h40

h24

h32

h40

h25

h33

h41

h25

h33

h41

h26

h34

h42

h26

h34

h42

h27

h35

h43

h27

h35

h43

h28

h36

h44

h28

h36

h44

h29

h37

h45

h29

h37

h45

h30

h38

h46

h30

h38

h46

h31

h39

h47

h31

h39

h47

Page

38 39 40

h48

h56

h64

h48

h56

h64

h49

h57

h65

h49

h57

h65

h50

h58

h66

h50

h58

h66

h51

h59

h67

h51

h59

h67

h52

h60

h68

h52

h60

h68

h53

h61

h69

h53

h61

h69

h54

h62

h70

h54

h62

h70

h55

h63

h71

h55

h63

h71

41 42 43 44 45 46 47

h72

h80

h88

h96

h104 h112 h120

h72

h80

h88

h96

h104 h112 h120

h73

h81

h89

h97

h105 h113 h121

h73

h81

h89

h97

h105 h113 h121

h74

h82

h90

h98

h106 h114 h122

h74

h82

h90

h98

h106 h114 h122

h75

h83

h91

h99

h107 h115 h123

h75

h83

h91

h99

h107 h115 h123

h76

h84

h92

h100 h108 h116 h124

h76

h84

h92

h100 h108 h116 h124

h77

h85

h93

h101 h109 h117 h125

h77

h85

h93

h101 h109 h117 h125

h78

h86

h94

h102 h110 h118 h126

h78

h86

h94

h102 h110 h118 h126

h79

h87

h95

h103 h111 h119 h127

h79

h87

h95

h103 h111 h119 h127

Address

h128

h129

h130

h131

h132

h133

h134

h135

h136

h137

h138

h139

h140

h141

h142

h143

h144

h145

h146

h147

h148

h149

h150

h151

h152

h153

h154

h155

h156

h157

h158

h159

h160

h161

h162

h163

h164

h165

h166

h167

h168

h169

h170

h171

h172

h173

h174

h175

h176

h177

h178

h179

h180

h181

h182

h183

Page

h184

h185

h186

h187

h188

h189

h190

h191

h192

h193

h194

h195

h196

h197

h198

h199

h200

h201

h202

h203

h204

h205

h206

h207

h208

h209

h210

h211

h212

h213

h214

h215

h216

h217

h218

h219

h220

h221

h222

h223

h224

h225

h226

h227

h228

h229

h230

h231

h232

h233

h234

h235

h236

h237

h238

h239

h240

h241

h242

h243

h244

h245

h246

h247

h248

h249

h250

h251

h252

h253

h254

h255

Table 11 shows the coefficient register assignments when there is a single filter (NF=0). For two filters (NF=1), the two filters

are interleaved, i.e., the heven in Table 11 will contain one filter and hodd will contain the other. Four four filters (NF=3), the four

filters are interleaved, i.e., h0, h4, h8, ... is the first filter, h1, h5, ... is the second, etc.

- 42 -

APRIL 27, 2001

This document contains preliminary information which may be changed at any time without notice

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