AS3435 datasheet(63/102 Pages) AMSCO

63 / 102 page

ams Datasheet, Confidential: 2014-Jun-13 [v1-30]

AS3415/AS3435 – 63

Detaile d Desc rip t ion

To keep the access time as short as possible, this format allows

a read access without the word address transfer in advance to

the data transfer. The bus is idle and the master issues a START

condition followed by the Device-Read address. Analogous to

Random Read, a single byte transfer is terminated with a

not-acknowledge after the 1st register byte. Analogous to

Sequential Read an unlimited number of data bytes can be

transferred, where the data bytes have to be responded with an

acknowledge from the master. For termination of the

transmission, the master sends a not-acknowledge following

the last data byte and a subsequent STOP condition.

Parameter

Figure 82:

I²C Serial Timing

VBAT ≥ 1.4V

1 , T

A=25ºC, unless otherwise specified.

Figure 83:

I²C Serial Interface Parameter

1. Serial interface operates down to VBAT = 1.0V but with 100kHz clock speed and degraded parameters.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VCSL

CSCL, CSDA Low

Input Level

(Max. 30%VBAT)

0.42

VCSH

CSCL, CSDA High

Input Level

CSCL, CSDA (min 70%VBAT)

0.98

HYST

CSCL, CSDA Input

Hysteresis

200

450

800

VOL

CSDA Low Output

Level

At 3mA

0.4

Tsp

Spike insensitivity

100

1-7

CSCL

CSDA

1-7

Start

Condition

Address

R/W

ACK

Data

ACK

Data

ACK

Stop

Condition

TSU

THD

TPD

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