Cirrus-logic CS4385 Manual de usuario descargar pdf (Pagina 16)

16 DS671F2

CS4385

SWITCHING CHARACTERISTICS - DSD

Logic 0 = GND; Logic 1 = VLS; C

=20pF.

Parameter Symbol Min Typ Max Unit

MCLK Duty Cycle 40 - 60 %

DSD_SCLK Pulse Width Low t

sclkl

160 - - ns

DSD_SCLK Pulse Width High t

sclkh

160 - - ns

DSD_SCLK Frequency (64x Oversampled)

(128x Oversampled)

1.024

2.048

3.2

6.4

MHz

DSD_A / _B valid to DSD_SCLK rising setup time t

sdlrs

20 - - ns

DSD_SCLK rising to DSD_A or DSD_B hold time t

sdh

20 - - ns

DSD clock to data transition (Phase Modulation Mode) t

dpm

-20 - 20 ns

sclkh

sclkl

DSDxx

DSD_SCLK

sdlrs

sdh

Figure 3. Direct Stream Digital - Serial Audio Input Timing

dpm

DSDxx

DSD_SCLK

(64Fs)

DSD_SCLK

(128Fs)

dpm

Figure 4. Direct Stream Digital - Serial Audio Input Timing for Phase Modulation Mode

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 ... 54 55

Features 1
Description 1
TABLE OF CONTENTS 2
LIST OF FIGURES 4
LIST OF TABLES 5
1. PIN DESCRIPTION 6
ABSOLUTE MAXIMUM RATINGS 8
See Note 12 12
(CONTINUED) 13
DIGITAL CHARACTERISTICS 14
16 DS671F2 16
=20pF 16
Repeated 17
3. TYPICAL CONNECTION DIAGRAM 19
DSD_SCLK 20
4. APPLICATIONS 21
4.2 Mode Select 22
DS671F2 23 23
4.3.1 OLM #1 24
4.3.2 OLM #2 24
4.3.3 OLM #3 25
4.3.4 OLM #4 25
4.3.5 TDM 26
4.4 Oversampling Modes 26
4.5 Interpolation Filter 26
4.6 De-Emphasis 27
4.7 ATAPI Specification 27
Not Used 28
4.9.1 Capacitor Placement 29
4.11 The MUTEC Outputs 30
4.12.1 Hardware Mode 31
4.12.2 Software Mode 32
4.14 Control Port Interface 32
4.14.1 MAP Auto Increment 32
4.14.2 I²C Mode 32
4.14.2.1 I²C Write 33
4.14.2.2 I²C Read 33
4.14.3 SPI Mode 34
4.14.3.1 SPI Write 34
5. REGISTER QUICK REFERENCE 35
36 DS671F2 36
Addr Function 7 6 5 4 3 2 1 0 36
6. REGISTER DESCRIPTION 37
6.2.5 Power Down (PDN) 38
6.3 PCM Control (address 03h) 38
6.3.2 Functional Mode (FM) 39
6.4 DSD Control (address 04h) 39
6.8.4 PCM Auto-Mute (PAMUTE) 43
6.8.5 DSD Auto-Mute (DAMUTE) 44
6.9.1 Mute (MUTE_xx) 44
76543210 47
7. FILTER PLOTS 48
DS671F2 49 49
50 DS671F2 50
DS671F2 51 51
8. PARAMETER DEFINITIONS 52
9. PACKAGE DIMENSIONS 53
48L LQFP PACKAGE DRAWING 53
10.ORDERING INFORMATION 54
11.REFERENCES 54
12.REVISION HISTORY 54
DS671F2 55 55

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Cirrus-logic CS4385 Manual de usuario Pagina 16

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