SX8722I070LF SEMTECH [Semtech Corporation], SX8722I070LF Datasheet - Page 101

• Manufacturer Part Number: SX8722I070LF
• Description: High gain acquisition for sensor interface
• Manufacturer: SEMTECH [Semtech Corporation]

15.2. Active mode
In this chapter you will find:
The description of the active mode
How to set SX8722 in active mode
15.2.1. Description
In active mode, SX8722 and all its peripherals can work and execute the measurement engine. The acquisition chain, the
alarms and the signal post processing can be activated and parameterized.
15.2.2. How to set SX8722 in active mode
Start-up
From Sleep mode
From Shutdown mode
15.3. Sleep mode
15.3.1. Description
The sleep mode is a low power mode. It can be called by an I2C sequence or by sending a negative pulse to SX8722
SLEEP pin.
15.3.2. Operating specifications of the sleep mode
Summary
ACS - Revision 4.2
©2008 Semtech Corp.
ADVANCED COMMUNICATIONS & SENSING
At start-up SX8722 is automatically set in active mode.
If there is no EEPROM configuration loaded at start-up, PGA are not active.
Positive pulse on RESET pin
Negative pulse on the SLEEP pin
SLEEP bit toggle in the SXCtrl1 register (I2C write mask command)
Other interruption
Positive pulse on RESET pin
Power-on-reset (negative pulse on VBAT pin)
SX8722 configuration saved in RAM
ADC stopped
VLD stopped (voltage level detector)
If Xtal present, clock set to Xtal 32k
If Xtal not present, clock set to RC minimum value (~80kHz)
Bias current off
October 2008
Page 101
High gain acquisition for sensor interface
DATASHEET
www.semtech.com
SX8722