NXP Semiconductors
FXTH87E
FXTH87E, Family of Tire Pressure Monitor Sensors
FXTH87ERM
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© NXP B.V. 2019. All rights reserved.
Reference manual
Rev. 5.0 — 4 February 2019
159 / 183
The firmware table is comprised of 3-byte entries where the first byte is the operational
code for the JMP instruction, and the following two bytes are the absolute address
pointing to the location of the firmware function.
Table 162. FXTH87Ex1x dual XZ-axis firmware summary and jump routines
Address
Routine
Description
E000
TPMS_RESET
Master reset of complete device
E003
TPMS_READ_VOLTAGE
10-bit uncompensated band gap voltage reading
E006
TPMS_COMP_VOLTAGE
8-bit compensation of 10-bit voltage reading
E009
TPMS_READ_TEMPERATURE
10-bit uncompensated temperature reading
E00C
TPMS_COMP_TEMPERATURE
8-bit compensation of 10-bit temperature reading
E00F
TPMS_READ_PRESSURE
10-bit uncompensated pressure reading
E012
TPMS_COMP_PRESSURE
9-bit compensation of 10-bit pressure reading
E015
TPMS_READ_ACCELERATION_X
10-bit uncompensated X-axis accel reading
E018
TPMS_READ_DYNAMIC_ACCEL_X
10-bit uncompensated X-axis accel reading
with dynamic offset adjustment.
E01B
TPMS_COMP_ACCELERATION_X
9-bit compensation of 10-bit X-axis accel reading
E01E
TPMS_READ_ACCELERATION_Z
10-bit uncompensated Z-axis accel reading
E021
TPMS_READ_DYNAMIC_ACCEL_Z
10-bit uncompensated Z-axis accel reading with dynamic
offset adjustment.
E024
TPMS_COMP_ACCELERATION_Z
9-bit compensation of 10-bit Z-axis accel reading
E027
TPMS_READ_ACCELERATION_XZ
10-bit uncompensated X-axis and Z-axis accel readings
E02A
TPMS_READ_DYNAMIC_ACCEL_XZ
10-bit uncompensated X-axis and Z-axis accel readings with
dynamic offset adjustment.
E02D
TPMS_COMP_ACCELERATION_XZ
9-bit compensation of 10-bit X-axis and Z-axis accel
readings
E030
TPMS_READ_V0
10-bit uncompensated voltage reading on PTA0 pin
E033
TPMS_READ_V1
10-bit uncompensated voltage reading on PTA1 pin
E036
TPMS_LFOCAL
LFO clock calibration
E039
TPMS_MFOCAL
MFO clock calibration
E03C
TPMS_RF_ENABLE
Enable and set up RFM
E03F
TPMS_RF_RESET
Master reset of RFM
E042
TPMS_RF_READ_DATA
Read RFM data buffer
E045
TPMS_RF_READ_DATA_REVERSE
Read RFM data buffer in reverse bit order
E048
TPMS_RF_WRITE_DATA
Write RFM data buffer
E04B
TPMS_RF_WRITE_DATA_REVERSE
Write RFM data buffer in reverse bit order
E04E
TPMS_RF_CONFIG_DATA
Configure RFM
E051
Reserved
Reserved
E054
TPMS_RF_SET_TX
Initiate RF transmission
E057
TPMS_RF_DYNAMIC_POWER
Adjusts PA for uniform power output
E05A
TPMS_MSG_INIT
Initialization of the emulated serial communication
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