Cirrus-logic CS61880 Manual de usuario descargar pdf (Pagina 60)

CS61880

60 DS450PP3

19.10 Switching Characteristics - Serial Port

Notes: 21. If SPOL = 0, then CS should return high no sooner than 20 ns after the 16

rising edge of SCLK during

a serial port read.

Parameter Symbol Min. Typ. Max Unit

SDI to SCLK Setup Time t

-20-ns

SCLK to SDI Hold Time t

cdh

-20-ns

SCLK Low Time t

-50-ns

SCLK High Time t

-50-ns

SCLK Rise and Fall Time t

, t

-15-ns

to SCLK Setup Time t

-20-ns

SCLK to CS

Hold Time Note 21 t

cch

-20-ns

Inactive Time t

cwh

-70-ns

SDO Valid to SCLK Note 21 t

cdv

-60-ns

to SDO High Z t

cdz

-50-ns

SDI

SCLK

SDO

CLKE=1

LAST ADDR BIT

SDO

CLKE=0

HIGH Z

cdv

cdz

D0 D1

D1 D6 D7

Figure 23. Serial Port Read Timing Diagram

SCLK

SDI

LSB LSB MSB

cch

cwh

cdh

Figure 24. Serial Port Write Timing Diagram

1 2 ... 55 56 57 58 59 60 61 62 63 64 65 ... 69 70

Octal E1 Line Interface Unit 1
TABLE OF CONTENTS 2
LIST OF FIGURES 5
LIST OF TABLES 6
(Top View) 7
160 FBGA 8
(Bottom View) 8
3. PIN DESCRIPTIONS 9
3.1 Power Supplies 9
3.2 Control 10
3.3 Address Inputs/Loopbacks 14
3.4 Cable Select 15
3.6 Digital Rx/Tx Data I/O 16
3.7 Analog RX/TX Data I/O 19
3.8 JTAG Test Interface 21
3.9 Miscellaneous 21
4. OPERATION 22
5. POWER-UP 22
6. MASTER CLOCK 22
7. G.772 MONITORING 22
DS450PP3 23 23
9. TRANSMITTER 24
9.1 Bipolar Mode 24
9.2 Unipolar Mode 24
DS450PP3 25 25
10. RECEIVER 26
10.1 Bipolar Output Mode 26
10.2 Unipolar Output Mode 26
10.3 RZ Output Mode 26
10.5 Loss-of-Signal (LOS) 27
11. JITTER ATTENUATOR 28
12. OPERATIONAL SUMMARY 29
12.1 Loopbacks 29
12.2 Analog Loopback 29
12.3 Digital Loopback 30
12.4 Remote Loopback 30
13. HOST MODE 32
13.1 SOFTWARE RESET 32
13.2 Serial Port Operation 32
13.3 Parallel Port Operation 33
13.4 Register Set 34
TAOS Enable Register (03h) 35
DFM Status Register (05h) 35
DS450PP3 41 41
15. ARBITRARY WAVEFORM 42
GENERATOR 42
16. JTAG SUPPORT 43
18. APPLICATIONS 50
18.3 Line Protection 52
19.3 Digital Characteristics 54
Attenuation in dB 56
Frequency in Hz 56
DS450PP3 57 57
RPOS/RNEG 59
CLKE = 1 59
CLKE = 0 59
62 DS450PP3 62
DS450PP3 63 63
64
DS450PP3 65 65
66 DS450PP3 66
68 DS450PP3 68
DS450PP3 69 69

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Cirrus-logic CS61880 Manual de usuario Pagina 60

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