MLX90132 Datasheet, PDF (6/44 Pages) Melexis Microelectronic Systems – 13.56MHz RFID / NFC Transceiver

MLX90132
13.56MHz RFID / NFC Transceiver
3 Power Management and Operating modes
The MLX90132 features 2 main operating modes: Idle and Active, with 6 different states of operation, as
described on the table below:
Mode
State
Description
Hibernate
Lowest power consumption, the MLX90132 wakes-up with low
level pulse on IRQ_IN pin
Low Power consumption: Wake-up source to exit from this mode is
configurable:
Sleep
Idle
- Timer
- IRQ_in pin (low-level)
- NSS pin (low-level)
- Field detector
Low power consumption: Tag detection feature, wake up source is
configurable
Tag detection
- Timer
- IRQ_in pin (low level)
- NSS pin (low level)
- Tag detector (mandatory)
Active
Ready
High frequency oscillator (HFO) is running. In this mode the
MLX90132 is in reader mode with its HF field turned OFF. The
MLX90132 waits for a command from the external application,
through the selected serial interface SPI or UART
Reader
High frequency oscillator (HFO) is running. In this mode the
MLX90132 is selected in reader mode with its HF field set ON. The
MLX90132 is able to receive and execute commands through the
selected serial interface SPI or UART and is able to communicate
with transponders and NFC devices, according to the selected
protocol. In Reader mode, the command “SendRecv” is used to
send and receive information from an NFC/RFID transponder or
devices
TAG Emulation
High frequency oscillator (HFO) is running. In this mode the
MLX90132 is selected in Tag emulation mode with its HF field set
OFF. The MLX90132 is able to receive and execute commands
through the serial interface SPI and is able to communicate with an
NFC/RFID reader, according to the selected protocol. In TAG
emulation mode, the commands “Listen” and “Send” will be used to
respectively receive/send the information from/to an NFC/RFID
reader. The information is returned to the NFC/RFID reader by
using load modulation method
Table 2: MLX90132 Operating modes & States
Entering in Hibernate, Sleep and Tag detector states is done with the Idle command (0x07). As soon as one
of these states is activated, an appropriate source signal is required to wake-up the device (see description
above). The wake-up time from Sleep or Hibernate to Ready state is typically of 2ms. This time is mainly due
to settling time of XTAL oscillator (HFO).
3901090132
Rev. 009
Page 6 of 44
Jan-2014