DVK90129 Melexis Inc, DVK90129 Datasheet - Page 26

• Manufacturer Part Number: DVK90129
• Description: DEVELOPMENT KIT MLX90129
• Manufacturer: Melexis Inc
• Series: -r
• Type: Development kitr

Specifications of DVK90129

• Contents: Board, Proxima RF™ Desktop Reader
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: MLX90129

RFID interrupt & status word (Devices address domain, address #01, read-only)
The following table summarizes the information about the interrupts which can be used with a RFID
communication. The RFID interrupt & status word in the Internal Device domain at the address 0x01 gives
the status of the interruptions. It is read only. It can be accessed with the command Read Internal Device.
For each bit of the RFID interrupt & status word, the condition to assert high or low the status flag is
described.
3901090129
Rev 007
Bits
#01 – RFID interrupt & status word
15:13
12
11:8
7
6
5
4
3
2
1
0
Interrupt description
Irq_ExternalEvent
Status flag is set to ‘1’ when
Irq_Sensor_Threshold
Status flag is set to ‘1’ when
Irq_Timer_WakeUp
Status flag is set to ‘1’ when
Irq_DMA_ready
Status flag is set to ‘1’ when
IRQ enable conditions
IRQ enable conditions
IRQ enable conditions
IRQ enable conditions
Name
(reserved)
Irq_ExternalEvent
(reserved)
Irq_Sensor_Threshold
Irq_Timer_WakeUp
Irq_DMA_ready
Irq_EEPROM_Full
(unused)
Transaction_Error_Flag
Last_Transaction_Status
Core_Main_Status
Reset condition
Reset condition
Reset condition
Reset condition
Set to ‘1’ the bits 9 and 11 of the register #12
Pin AT is not connected to GND
Pin AT is connected to GND
Set to ‘1’ the bits 8,9,10 of the registers #15, #1B, #21
The last ADC output code crosses the defined threshold level or window
The chip is requested to read a new value of the sensor
Set to ‘1’ the bit 0 of the register #10
The timer has completed its counting phase
The timer is requested to start a new counting phase (during the automatic
logging mode)
Set to ‘1’ the bit 2 of the register #09
The DMA unit has completed the last requested transaction
Read the RFID interrupt & status word
Description (if bit=1)
The pin AT has been disconnected from the GND.
The output data from the sensor has crossed the defined threshold
level or window
The count-down of the wake-up is over
The DMA transaction has been completed (in the non-loop mode)
The allocated memory for a datalogging with loop enable is full. The
datalogger starts to overwrite the first data.
One of the previously executed commands has failed (delay not
fulfilled, denied access, data not processed …). This bit is
automatically cleared after power-on or after read of the RFID interrupt
& status word.
This bit indicates whether the last request has been processed (‘0’) or
not (‘1’). In this latter case, the MLX90129 ignores any new request.
The system is busy with an internal operation and the request from
RFID cannot be processed.
13.56MHZ SENSOR TAG / DATALOGGER IC
Page 26 of 56
MLX90129
Data Sheet
March 2011