Cirrus-logic CS4385A Uživatelský manuál stáhnout pdf (Strana 16)

16 DS837F2

CS4385A

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
DS837F2 7 7
7
Pin Name # Pin Description 7
ABSOLUTE MAXIMUM RATINGS 8
See Note 12 12
(CONTINUED) 13
DIGITAL CHARACTERISTICS 14
16 DS837F2 16
=20pF 16
Repeated 17
DS837F2 19 19
20 DS837F2 20
4. APPLICATIONS 21
4.2 Mode Select 22
DS837F2 23 23
4.3.1 OLM #1 24
4.3.2 OLM #2 24
4.3.3 OLM #3 24
4.3.4 OLM #4 25
4.3.5 TDM 25
4.4 Oversampling Modes 25
4.5 Interpolation Filter 26
4.6 De-Emphasis 26
4.7 ATAPI Specification 27
4.9.1 Capacitor Placement 28
Figure 22. Full-Scale Output 29
4.11 The MUTEC Outputs 30
4.12.1 Hardware Mode 30
4.12.2 Software Mode 31
5. CONTROL PORT INTERFACE 32
5.3 SPI Mode 33
5.3.1 SPI Write 33
76543210 34
00000000 34
6. REGISTER QUICK REFERENCE 35
36 DS837F2 36
Addr Function 7 6 5 4 3 2 1 0 36
7. REGISTER DESCRIPTION 37
7.2.5 Power Down (PDN) 38
7.3 PCM Control (Address 03h) 38
7.3.2 Functional Mode (FM) 39
7.4 DSD Control (Address 04h) 39
7.8.4 PCM Auto-Mute (PAMUTE) 43
7.8.5 DSD Auto-Mute (DAMUTE) 43
7.9.1 Mute (MUTE_xx) 44
8. FILTER PLOTS 48
Amplitude (dB) 49
9. PARAMETER DEFINITIONS 52
10.PACKAGE DIMENSIONS 53
11.ORDERING INFORMATION 53
48L LQFP PACKAGE DRAWING 53
12.REFERENCES 54
13.REVISION HISTORY 55

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