DVK90129 Melexis Inc, DVK90129 Datasheet - Page 37

• 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

DMA status register (Device Address Domain, #05, read only)
9.1.5 Wake-up timer / Power management configuration
The Wake-up timer is used for two purposes:
The following table contains the control options of this timer:
Wake-up timer (WUT) / Power management configuration words
(EEPROM & register, addresses #0F and #10, read / write)
3901090129
Rev 007
Bits
#05 - DMA status register
15:0
Bits
#0F – Timer period
15:0
15:6
#10 – Timer Control word
5:4
3
2
1
0
-
-
-
Name
DMA_Current_Destination
_Address
to wake-up the microcontroller after a defined delay via the IRQ pin
to enable and sequence the periodical logging of data from the sensor
to enter the stand-by mode after a programmed delay
Name
-
WUT_Precision
WUT_AutoStandby_En
WUT_AutoLog_En
-
WUT_Irq_En
WUT_CountDownPeriod
Description
Reserved (must be 0)
Precision. Defines the time unit for the specified timer wake-up period
(called Count-down period).
Automatic stand-by enabled. Allow the MLX90129 to automatically
enter the stand-by mode after the end of the wake-up timer count-down,
or after completion of the automatic logging (if it is enabled).
Automatic logging mode enabled. If this bit is set to ‘1’, the wake-up
timer loads its value from the Register file and starts a count-down. As
soon as it reaches 00h, it allows to run one or several sensor
acquisitions and to store the data in the programmed destination. Then,
it loads its count-down period again and starts counting. This process
may be halted by resetting this bit to ‘0’.
.
Timer IRQ enabled. The timer starts its operation and generates IRQ
signal after passing specified period.
Combined with the WUT_Precision, this parameter defines the period
between two measurements. If N is the conversion into decimal value of
the WUT_CountDownPeriod hexadecimal value, the nominal logging
period will be:
WUT_Precision = 00 -> Period = N * 0.9765625 ms
WUT_Precision = 01 -> Period = N * 1 s
WUT_Precision = 10 -> Period = N * 1 min
WUT_Precision = 11 -> Period = N * 1 hour
Reserved (must be 0)
00: time in ms
01: time in s
10: time in min
11: time in hours
Description
Address of the block of memory in the destination address domain
(which is still not filled with data from the source device).
13.56MHZ SENSOR TAG / DATALOGGER IC
Page 37 of 56
(when =1)
MLX90129
Data Sheet
March 2011