MLX90132 Datasheet, PDF (26/44 Pages) Melexis Microelectronic Systems – 13.56MHz RFID / NFC Transceiver

MLX90132
13.56MHz RFID / NFC Transceiver
6.9 Idle command (0x07)
This command is used to switch the MLX90132 into low-power mode. Several sub-modes or states could be
selected as shown in the table below. Please note that except when an error occurs (the answer is then
directly sent), the response to an Idle command is sent only when the MLX90132 exits the low-power mode.
Idle0x07
Direction
Data
07
0E
Comments
Command code
Length of data
Example
<WUFlags>
Specifies wake-up sources and LFO
frequency. Refer to Table 24
<EnterCtrlL>
<EnterCtrlH>
<WUCtrlL>
<WUCtrlH>
<LeaveCtrlL>
<LeaveCtrlH>
<WUPeriod>
MCU – device
<OscStart>
<DacStart>
2 bytes: Settings to enter Idle mode, refer to
Table 25 below
2 bytes: Settings to wake-up from Idle mode
(recommended value = 0x3800), refer to
Table 25 below
2 bytes: Settings to leave Idle mode
(recommended value = 0x1800), refer to
Table 25 below
Period of time between two TAG detection
bursts. Also used to specify the duration before
timeout. Refer to Equation 1
Waiting time for the HFO to stabilize (based
time: LFO), recommended value = 0x60
Waiting time for the DAC to stabilize (based
time: LFO), recommended value = 0x60
0x070E0A210038011800086060
54603F00– Tag detector with
LFO set at 32kHz. Possibility to
WU on low level IRQIN
0x070ECB210038011800086060
54603F10 – Tag detector with
LFO set at 4kHz. Possibility to
WU on low level IRQIN and
timeout (MaxSleep set to 0x10)
Device– MCU
Device – MCU
<DacDataL>
<DacDataH>
<SwingsCnt>
<MaxSleep4:0>
0x00
0x01
<WUFlags>
0x82
0x00
Lower compare value for TAG detection. Note:
Only the 6 MSB bits are available
Higher compare value for TAG detection. Note:
Only the 6 MSB bits are available
Number of HF periods during TAG detection.
Refer to Equation 2.
Maximal number of TAG detection trials before
timeout. Value set to 0 during TAG detection
calibration.
0x00 <MaxSleep< 0x1F (bit 7 to 5 are RFU
and must be set to 0)
Also used to specify duration before timeout,
refer to Equation 3.
Result code
Length of data
Content of WUFlags, please refer to Table 24
below
Error code
Length of data
Table 23: “Idle” command description
0x0001XX - Here XX is a value of
WUFlags, please note that this
response is sent only when
device exits idle mode
0x8200 – Invalid command length
3901090132
Rev. 009
Page 26 of 44
Jan-2014