DVK90129 Melexis Inc, DVK90129 Datasheet - Page 13

• 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

7.3.1 EE-Latches
Another kind of non-volatile memory is used to store the trimming / configuration bits that should be
immediately available: the EE-Latch bank. They are mainly used for the trimming of the oscillators and the
capacitance of the antenna, for security and power management.
/!\ It is important to read its value before re-programming it, in order to not erase some trimming bits.
EE-Latches map: (Internal Devices Domain, Address #03, #04 and #09, read/write)
(**) - following fields are not accessible for write from RFID interface via device write command.
EE-Latches backup in EEPROM
The content of EE-Latches (Internal devices #03, #04 and #09) are copied in the EEPROM for backup:
EEPROM #27 and #28
3901090129
Rev 007
Bits
#03 - EE-Latches word 0
4:0
6:5
7
10:8
13:11
14
15
#04 - EE-Latches word 1
1:0
2
3
7:4
14:8
15
4:0
15:5
Bits
#27 - Internal device backup word 1
15:0
#28 -Internal device backup word 2
3:0
15:4
#09 - CTC code
Name
LFO_Freq_Trim
Bias_Cur_Trim
DisableAutoLoading
HFO_Freq_Trim
VReg_Trim
RCb_Quartz
Disconnect_Vfield_Vbat
Mod_Res
VReg_Dis
VReg_LV
Reserved
RFID_EEPROM_Lock_Map**
RFID_Device_Lock**
CTC_Trim
Not used
Description
Copy of internal device #03 bits [15:0]
Copy of internal device #04 bits [3:0]
random
(Trimming bits)
(Trimming bits)
(Trimming bits)
(Trimming bits)
(Trimming bits)
Description (when the bit is asserted high)
(used by Melexis)
(used by Melexis)
Disables the automatic loading of the Register File with its image
from the EEPROM after a power-on reset from the battery
(used by Melexis)
(used by Melexis)
Selects the low-frequency RC-oscillator LFO (=0) or the quartz-
oscillator XLFO (=1)
Disconnects the pads VFIELD and VBAT, when not using the
energy from the field to supply the whole device.
11: default modulator resistance
Disables the VReg regulator and shorts-cut its output to Vbat
Low-voltage option for the VREG regulator and the sensor regulator
(Must be 0)
Map of pages in EEPROM, to be locked for RFID write, using the
“Lock” command
Locks the RFID device
(used by Melexis)
(Must be 0)
13.56MHZ SENSOR TAG / DATALOGGER IC
Page 13 of 56
MLX90129
Data Sheet
March 2011