CS61581-IL(2005) データシートの表示（PDF） - Cirrus Logic

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CS61581-IL
(Rev.:2005)

T1/E1 Universal Line Interface

Cirrus Logic 

CS61581

SWITCHING CHARACTERISTICS (TA = -40° to 85°C; TV+, RV+ = 5V ±5%;

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

SCLK to SDO Valid

CS to SDO High Z

Notes: 24. Output load capacitance = 50 pF

Symbol Min

Typ

tdc

50

-

tcdh

50

-

tcl

240

-

tch

240

-

tr, tf

-

-

tcc

50

-

tcch

50

-

tcwh

250

-

(Note 24) tcdv

-

-

tcdz

-

100

Max Units

-

ns

-

ns

-

ns

-

ns

50

ns

-

ns

-

ns

-

ns

200

ns

-

ns

CS

SCLK

SDI

CS

t cwh

t cc t ch

t cl

t cch

t dc

LSB

t cdh

CONTROL BYTE

t cdh

LSB

MSB

DATA BYTE

Figure 4. Serial Port Write Timing Diagram

SCLK

SDI

LAST ADDR BIT

t cdv

SDO

CLKE = 0

D0

D1

D6

tcdv

SDO

CLKE = 1

D0

D1

D6

t cdz

D7

HIGH Z

D7

Figure 5. Serial Port Read Timing Diagram

DS211PF1P8

9

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