MLX90129RUC-CAA-000-WB(2012) 데이터 시트보기 (PDF) - Melexis Microelectronic Systems
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MLX90129RUC-CAA-000-WB 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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3901090129
Rev 009
Page 15 of 60
Data Sheet
Jun/12
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