AS7000 datasheet(9/92 Pages) AMSCO

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ams Datasheet

Page 9

[v1-12] 2018-Feb-26

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AS7000 − Electrical Characteristics

Note(s):

1. Deep sleep mode. Use ams SDK (software development kit) to enter deep sleep, wakeup with low on GPIO8 pin (if gpio8_wakeup_

en=1) or high on GPIO7 (if gpio7_wakeup_en=1) or 512Hz oscillator sleep_timer.

2. GPIO0-8 configured to draw minimum current (software dependent).

3. Power down mode. Entered by setting enter_powerdown=1; No oscillator running. Wakeup with low on GPIO8 pin (always) or high

on GPIO7 (if gpio7_wakeup_en=1).

4. A device must internally provide a hold time of at least 300ns for the SDA signal (referred to the VIHMIN of the SCL signal) to bridge

the undefined region of the falling edge of SCL.

5. A fast-mode device can be used in a standard-mode system, but the requirement tSU:DAT = to 250ns must then be met. This is

automatically the case if the device does not stretch the LOW period of the SCL signal. If such a device does stretch the LOW period

of the SCL signal, it must output the next data bit to the SDA line tR max + tSU:DAT = 1000 + 250 = 1250ns before the SCL line is released.

Figure 7:

I²C Mode Timing Diagram

I²C Mode Timing Diagram: This figure shows the different timings required for I²C communication.

Note(s):

1. SCL / SDA Programmable to GPIO Pins – See

I²C Mode.

CI/O

I/O capacitance (SDA, SCL)

Symbol

Parameter

Conditions

Min Typ

Max

Unit

SCLK

SDA

tBUF

tHD:STA

tSU:STA

REPEATED

START

tSU:STO

tSU:DAT

tHIGH

tHD:DAT

tLOW

tHD:STA

START

STOP

AS7000 数据表(PDF) 9 Page - ams AG

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