AS3932-BTST austriamicrosystems, AS3932-BTST Datasheet - Page 11

• Manufacturer Part Number: AS3932-BTST
• Description: IC RF PROGRAM 16-TSSOP
• Manufacturer: austriamicrosystems

Specifications of AS3932-BTST

• Rf Type: Read / Write
• Frequency: 110kHz ~ 150kHz
• Features: RSSI Equipped
• Package / Case: 16-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: AS3932-BTSTTR

AS3932
Datasheet - D e t a i l e d D e s c r i p t i o n
8 Detailed Description
The AS3932 is a three-dimensional low power low-frequency wakeup receiver. The AS3932 is capable to detect the presence of an inductive
coupled carrier and extract the envelope of the On-Off-Keying (OOK) modulated carrier. In case the carrier is Manchester coded the clock is
recovered from the transmitted signal and the data can be correlated with a programmed pattern. If the detected pattern corresponds to the
stored one a wake-up signal (IRQ) is risen up. The pattern correlation can be bypassed in case and the wake-up detection is based only on the
frequency detection.
The AS3932 is made up by three independent receiving channels, one envelop detector, one data correlator, one Manchester decoder, 8
programmable registers with the main logic and a real time clock.
The digital logic can be accessed by an SPI. The real time clock can be based on a crystal oscillator or on an internal RC one. In case the
second is used to improve its accuracy a calibration can be performed.
Figure 10. Block Diagram of LF Wakeup Receiver AS3932
www.austriamicrosystems.com/LF-Receiver/AS3932
LF1P
LF2P
LF3P
LFN
Amplifier 3
Amplifier 1
Amplifier 2
Channel
Channel
Channel
AS3932
Amp Out
Amp Out
Amp Out
RSSI
RSSI
RSSI
VCC
Channel
Selector
Bias
GND
I/V
Wakeup
Revision 1.4
Envelope Detector /
Manchester
Data Slicer
Logic
Main
Decoder
X
IN
Xtal RTC
X
OUT
SDI
Correlator
RC RTC
IRQ
SCL
SDI
SDO
CS
DAT
CL_DAT
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