MLX90129RGO-CAA-000-TU Просмотр технического описания (PDF) - Melexis Microelectronic Systems
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MLX90129RGO-CAA-000-TU Datasheet PDF : 60 Pages
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MLX90129
13.56MHZ SENSOR TAG / DATALOGGER IC
7.3.2. Sensors ADC buffers
In order to read the output data of a sensor, the SPI master or the RFID base-station has to access one of the 3 ADC buffer in the
Internal Device address domain. Accessing (read command) this buffer makes:
Load the selected sensor configuration into the register file
Start the A/D conversion and the data processing.
Then the command read ADC buffer sensor 2 (Read Internal Device #08) sent by RFID or by SPI overwrite the register file with the
configuration of the sensor 2 (EEPROM from #21 to #26).
To make sure that all operations are done, it is enough to:
Wait for a specific period of time and read the internal device #02 (local buffer).
Periodically monitor the SPI/RFID Core status word and check the bit: Sensor interrupt: Data ready.
7.4. Configuration EEPROM & Register files
The MLX90129 embeds a 4kbits EEPROM memory. This non-volatile memory contains the configuration parameters and some
identification numbers. The configuration part of the EEPROM consists of 45 words of 16 bits. The 210 other words are available
for the specific needs of the application or may be used for data-logging or for the configuration of the external devices. The read
and write access rights are defined for each page and depends on the device wanting to access it: a microcontroller, a RFID base-
station or the internal DMA unit of the MLX90129. The user can also lock and unlock some pages by sending the appropriate RFID
commands.
7.4.1. EEPROM Map
Address
#00
#01
#02
#03
#04
#05
#06
#07
#08
#09
#0A
#0B
#0C
#0D
#0E
#0F
#10
#11
Description
UID (Unique Identifier)
UID: bits 15:0
UID: bits 31:16
UID: bits 47:32
UID: bits 63:48
Security configuration space
EEPROM security map
Device security map
Password RFID
(not used)
(not used)
DMA configuration space
DMA: Control word
DMA: Source address word
DMA: Destination address word
DMA: Length
SPI (External memory) configuration space
External memory: Control word
External memory: Command codes word
Timer (power control) configuration space
Timer: Period
Timer: control word
Address space always accessible from RFID interface
RFID user register: its purpose is user-defined.
Link
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REVISION 011 - JUNE 13, 2017
3901090129
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