WM8195(2002) 查看數據表（PDF） - Wolfson Microelectronics plc

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WM8195
(Rev.:2002)

14-bit 12MSPS CIS/CCD Analogue Front End/Digitiser

Wolfson Microelectronics plc 

Advanced Information

WM8195

SERIAL INTERFACE

SCK

SDI

SEN

SDO

tSPER

tSSU

tSH

tSCKL tSCKH

tSCE

ADC DATA

tSEW tSEC

tSERD

tSCRD

t

SCRDZ

MSB

LSB

REGISTER DATA

ADC

DATA

Figure 5 Serial Interface Timing

Test Conditions

AVDD1 = AVDD2 = DVDD1 = DVDD2 = DVDD3 =4.75 to 5.25V, AGND = DGND = 0V, TA = 0 to 70°C, MCLK = 24MHz

unless otherwise stated.

PARAMETER

SCK period

SYMBOL

tSPER

TEST CONDITIONS

SCK high

tSCKH

SCK low

tSCKL

SDI set-up time

tSSU

SDI hold time

tSH

SCK to SEN set-up time

tSCE

SEN to SCK set-up time

tSEC

SEN pulse width

tSEW

SEN low to SDO = Register data

tSERD

SCK low to SDO = Register data

tSCRD

SCK low to SDO = ADC data

tSCADC

Note: Parameters are measured at 50% of the rising/falling edge.

MIN

41.6

18.8

18.8

6

6

12

12

25

TYP

MAX

30

30

30

UNITS

ns

ns

ns

ns

ns

ns

ns

ns

ns

ns

ns

w

AI Rev 2.0 September 2002

9

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