DVK90129 Melexis Inc, DVK90129 Datasheet - Page 14

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DVK90129

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

Specifications of DVK90129

Contents
Board, Proxima RF™ Desktop Reader
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
For Use With/related Products
MLX90129
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:
Ex: The command read ADC buffer sensor 0 (Read Internal Device #06) sent by RFID or by SPI loads the
configuration of the sensor 0 from EEPROM (address #15 to #1A) into the register file and start the A/D
conversion. The output of the conversion is available in the internal device #02 (local buffer).
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).
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
3901090129
Rev 007
To make sure that all operations are done, it is enough to:
Address
#00
#01
#02
#03
#04
#05
#06
#07
#08
#09
#0A
#0B
#0C
#0D
#0E
#0F
#10
#11
7.4 Configuration EEPROM & Register files
Load the selected sensor configuration into the register file
Start the A/D conversion and the data processing.
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.
Description
UID: bits 15:0
UID: bits 31:16
UID: bits 47:32
UID: bits 63:48
EEPROM security map
Device security map
Password RFID
(not used)
(not used)
DMA: Control word
DMA: Source address word
DMA: Destination address word
DMA: Length
External memory: Control word
External memory: Command codes word
Timer: Period
Timer: control word
RFID user register: its purpose is user-defined.
Address space always accessible from RFID interface
SPI (External memory) configuration space
Timer (power control) configuration space
Security configuration space
DMA configuration space
13.56MHZ SENSOR TAG / DATALOGGER IC
UID (Unique Identifier)
Page 14 of 56
MLX90129
Data Sheet
March 2011
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