DVK90129 Melexis Inc, DVK90129 Datasheet - Page 10

• 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

7.2.1 Digital controller
The main features of the digital part of
MLX90129, called Digital Controller are:
The
transactions between the communication
interfaces, the memories and the sensor. It
allows also a standalone mode with its DMA
unit. All these blocks are described in the
next chapters.
The SPI and RFID communication ways can be used concurrently. The Core transaction arbiter handles the
priorities and the interrupts. It updates some status bits that may be used by the external microcontroller or
the RFID base-station to optimize the communication.
The Digital Controller of the MLX90129 allows the user to do the following tasks, via SPI or RFID:
_ Configure the sensor interface and the communication media.
_ Manage the power consumption, the interrupts, the security items,…
_ Run A/D conversions of the selected sensors.
_ Store (or read) data in the internal or in an external EEPROM.
_ Configure and start a standalone process (sleep – sense – interrupt or store – sleep - …)
_ Get the status of the current process.
All these tasks may be done by simply reading or writing the different memories: EEPROM, registers, ee-
Latches, internal devices. Thus, several address domains are defined to access them in an easy way.
7.2.2 Address domains
Four address domains have been defined to designate the memory and the non-memory devices that act
during the requested transactions:
- EEPROM address domain:
This domain addresses the non-volatile EEPROM. It is used to store the user-defined data and the image of
the Register File that can be automatically downloaded after a power-on. This memory block is energy
independent and can store data even when the MLX90129 is no longer powered.
- Register File address domain:
This memory domain is used to store the current configuration information of all internal MLX90129 devices
(Sensor interface, Power management …). This memory is energy-dependent and must be updated each
time the MLX90129 is turned-on.
3901090129
Rev 007
7.2 Digital Controller and memory domains
•
•
•
•
•
•
•
•
digital
Slave / Master SPI interface
RFID interface
DMA: Direct Memory Access
Register File controller
EEPROM controller
Sensor interface controller
Clock and Power management
Core: transactions arbiter and
interrupt manager
controller
manages
the
13.56MHZ SENSOR TAG / DATALOGGER IC
Page 10 of 56
MLX90129
Data Sheet
March 2011