CS61584A データシートの表示（PDF） - Cirrus Logic

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CS61584A

Dual T1/E1 Line Interface

Cirrus Logic 

DS261PP5

CS61584A

SWITCHING CHARACTERISTICS - SERIAL PORT (TA = -40 to 85 °C; DV+, TV+, RV+ =

nominal ± 0.3 V; Inputs: Logic 0 = 0 V, Logic 1 = RV+)

Parameter

SDI to SCLK Setup Time

SCLK to SDI Hold Time

SCLK Low Time

SCLK High Time

SCLK Rise and Fall Time

CS to SCLK Setup Time

SCLK to CS Hold Time

CS Inactive Time

SDO Valid to SCLK

CS to SDO High Z

Symbol Min

Typ

Max Unit

tdc

tcdh

tcl

tch

tr, tf

tcc

(Note 28)

tcch

tcwh

(Note 29)

tcdv

tcdz

25

-

25

-

50

-

50

-

-

-

20

-

20

-

100

-

-

-

-

50

-

ns

-

ns

-

ns

-

ns

15

ns

-

ns

-

ns

-

ns

50

ns

-

ns

Notes: 28. If SPOL = 0, then CS should return high no sooner than 20 ns after the 16th rising edge of SCLK during

a serial port read.

29. Output load capacitance = 50 pF.

CS

SCLK

SDI

t cwh

t cc t ch

t cch

t cl

t dc

LSB

t cdh

CONTROL BYTE

LSB

t cdh

MSB

DATA BYTE

Figure 4. Serial Port Write Timing Diagram

CS

SCLK

SDO

SPOL = 0

10

tcdv

Figure 5. Serial Port Read Timing Diagram

t cdz

HIGH

DDS2S6216P1PF15

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