AS3956 datasheet(67/109 Pages) AMSCO

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ams Datasheet

Page 67

[v1-10] 2018-Apr-27

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AS3956 − Detailed Description

SPI Timing

Figure 65:

SPI Timing

Note(s):

1. TSCLK=TSCLKL+TSCLKH, during EEPROM read the SCLK period has to be increased to 1μs (this limitation is imposed by EEPROM read

access time)

2. TNCSL = 300μs min in Power mode 0.

Symbol

Parameter

Min

Typ

Max

Unit

Note

General Timing (VP_IO= 3.3V, Temperature 25°C)

TSCLK

SCLK period

200

10000

See note (1)

TSCLKL

SCLK low

TSCLKH

SCLK high

Tgs

Glitch suppression on

SCLK input

TSSH

SPI reset (/SS high)

TNCSL

/SS falling to SCLK rising

25(2)

First SCLK pulse

TNCSH

SCLK falling to /SS rising

Last SCLK pulse

TDIS

Data in setup time

TDIH

Data in hold time

Read Timing (VP_IO= 3.3V, Temperature 25°C, Cload ≤ 50pF)

TDOD

Data out delay

TDOHZ

Data out to high

impedance delay

EEPROM Write Timing (VP_IO= 3.3V, Temperature 25°C)

TEWS

EEPROM write time via SPI

8.3

9.5

/SS rising edge to

IRQ I_io_eewr

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