Cirrus-logic CS5378 Manuale Utente Pagina 43
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CS5378
DS639F3 43
Table 13. SINC3 Filter Coefficients
Filter Type
System Function Filter Coefficients
SINC3 (Stage 1)
SINC3 (Stage 2)
SINC3 (Stage 3)
4
th
order decimate by 5
17 coefficients
4
1
5
1
1
)(
−
−
=
−
−
z
z
zH
h
0
= 1 h
9
= 80
h
1
= 4 h
10
= 68
h
2
= 10 h
11
= 52
h
3
= 20 h
12
= 35
h
4
= 35 h
13
= 20
h
5
= 52 h
14
= 10
h
6
= 68 h
15
= 4
h
7
= 80 h
16
= 1
h
8
= 85
SINC3 (Stage 4)
5
th
order decimate by 5
21 coefficients
5
1
5
1
1
)(
−
−
=
−
−
z
z
zH
h
0
= 1 h
11
= 365
h
1
= 5 h
12
= 320
h
2
= 15 h
13
= 255
h
3
= 35 h
14
= 185
h
4
= 70 h
15
= 121
h
5
= 121 h
16
= 70
h
6
= 185 h
17
= 35
h
7
= 255 h
18
= 15
h
8
= 320 h
19
= 5
h
9
= 365 h
20
= 1
h
10
= 381
SINC3 (Stage 5)
5
th
order decimate by 2
6 coefficients
5
1
2
1
1
)(
−
−
=
−
−
z
z
zH
h
0
= 1
h
1
= 5
h
2
= 10
h
3
= 10
h
4
= 5
h
5
= 1
SINC3 (Stage 6)
6
th
order decimate by 3
13 coefficients
6
1
3
1
1
)(
−
−
=
−
−
z
z
zH
h
0
= 1 h
7
= 126
h
1
= 6 h
8
= 90
h
2
= 21 h
9
= 50
h
3
= 50 h
10
= 21
h
4
= 90 h
11
= 6
h
5
= 126 h
12
= 1
h
6
= 141
SINC3 (Stage 7)
6
th
order decimate by 2
7 coefficients
6
1
2
1
1
)(
−
−
=
−
−
z
z
zH
h
0
= 1
h
1
= 6
h
2
= 15
h
3
= 20
h
4
= 15
h
5
= 6
h
6
= 1
- Features 1
- Description 1
- TABLE OF CONTENTS 2
- DS639F3 3 3
- LIST OF FIGURES 4
- LIST OF TABLES 5
- 1. GENERAL DESCRIPTION 6
- 1.1 Digital Filter Features 6
- 1.3 System Level Features 7
- 1.4 Configuration Interface 8
- DS639F3 9 9
- SPI Registers 11
- Digital Filter Registers 11
- ABSOLUTE MAXIMUM RATINGS 12
- THERMAL CHARACTERISTICS 13
- DIGITAL CHARACTERISTICS 13
- POWER CONSUMPTION 13
- SWITCHING CHARACTERISTICS 14
- 3. SYSTEM DESIGN WITH CS5378 18
- 3.1 Power Supplies 18
- 3.2 Reset Control 18
- 3.3 PLL and Clock Generation 18
- DS639F3 19 19
- BOOT Reset Mode 21
- 1 EEPROM boot 21
- 0 Microcontroller boot 21
- DS639F3 23 23
- DS639F3 25 25
- Serial Read from EEPROM 26
- DS639F3 27 27
- Sample Command: 28
- Write ROM Coefficients - 0x04 28
- Filter Start - 0x07 28
- DS639F3 29 29
- Table 8. Example EEPROM File 29
- DS639F3 32 32
- Figure 19. SPI Registers 32
- DS639F3 33 33
- DS639F3 34 34
- DS639F3 35 35
- Correction 36
- 10.4 Modulator Data Input 37
- 10.5 Modulator Flag Input 37
- Computation Cycles 39
- Standby Mode 39
- 12.SINC FILTER 40
- 12.1 SINC1 Filter 40
- 12.2 SINC2 Filter 40
- 12.3 SINC3 Filter 40
- SINC filters 41
- DS639F3 43 43
- 13.FIR FILTER 44
- 13.1 FIR1 Filter 44
- 13.2 FIR2 Filter 44
- 13.3 On-Chip FIR Coefficients 45
- SINC + FIR filters 46
- DS639F3 47 47
- Minimum phase group delay 48
- DS639F3 49 49
- Figure 27. FIR1 Coefficients 49
- DS639F3 50 50
- DS639F3 51 51
- 14.IIR FILTER 52
- 14.1 IIR Architecture 52
- 14.2 IIR1 Filter 52
- 14.3 IIR2 Filter 52
- 14.4 IIR3 Filter 53
- 14.5 On-Chip IIR Coefficients 53
- IIR filters 54
- DS639F3 55 55
- DS639F3 56 56
- DS639F3 57 57
- DS639F3 58 58
- DS639F3 59 59
- DS639F3 60 60
- DS639F3 62 62
- DS639F3 63 63
- DS639F3 64 64
- DS639F3 65 65
- 20.REGISTER SUMMARY 66
- 20.1 SPI Registers 66
- DS639F3 67 67
- SPI Address: 0x00 67
- DS639F3 68 68
- SPI Address: 0x03 68
- DS639F3 69 69
- SPI Address: 0x06 69
- DS639F3 70 70
- SPI Address: 0x09 70
- 20.2 Digital Filter Registers 71
- DS639F3 72 72
- DF Address: 0x00 72
- DS639F3 73 73
- DF Address: 0x0E 73
- DS639F3 74 74
- DF Address: 0x20 74
- DS639F3 75 75
- DF Address: 0x21 75
- DS639F3 76 76
- DF Address: 0x25 76
- DF Address: 0x29 77
- DS639F3 77 77
- DS639F3 78 78
- DF Address: 0x2A 78
- DS639F3 79 79
- DF Address: 0x2B 79
- DS639F3 80 80
- DF Address: 0x2C 80
- DS639F3 81 81
- DF Address: 0x2E 81
- DS639F3 82 82
- DF Address: 0x2F 82
- 22.PACKAGE DIMENSIONS 85
- 28L SSOP PACKAGE DRAWING 85
- CS5378-ISZ (Lead Free) 86
- 25.REVISION HISTORY 87
- DS639F3 88 88
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