TDA7705 datasheet(22/42 Pages) STMICROELECTRONICS

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Electrical specifications

TDA7705

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Doc ID 15938 Rev 9

3.4.10

SPI interface

The following parameters apply to the serial bus communication when SPI protocol has

been selected at start-up. For the other electrical characteristics of the pins, Section 3.4.8

applies.

Figure 9.

SPI bus timing diagram

3.4.11

Warning

When the TDA7705 is not powered on, the internal ESD protection diodes pull-down keep

the I2C/SPI lines connected to ground. This implies that the I2C/SPI bus connected to the

TDA7705 may not be used to drive other devices when the TDA7705 is powered off.

Table 16.

SPI interface

Symbol

Parameter

Min

Max

Unit

fSCK

Clock frequency

4.0

MHz

tSU

Data setup time

Data hold time

tWH

SCK high time

tWL

SCK low time

tRI

Input rise time

µs

tFI

Input fall time

µs

Output valid from clock low

tHO

Output hold time

tDIS

Output disable time

tCS

CS high time

tCSS

CS setup time

tCSH

CS hold time

VALID IN

VIH

VIL

tCSS

VIH

VIL

VIH

VIL

VOH

VOL

HI-Z

tSU

tWH

tWL

tCS

tCSH

tHO

tDIS

HI-Z

SPI_SS

SPI_CLK

SPI_MOSI

SPI_MISO

tRI

tFI

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