NXP Semiconductors
FXTH87E
FXTH87E, Family of Tire Pressure Monitor Sensors
FXTH87ERM
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2019. All rights reserved.
Reference manual
Rev. 5.0 — 4 February 2019
146 / 183
Table 136. RFM control register 1 (RFCR1) (address $0031)
Bit
7
6
5
4
3
2
1
0
R
W
FRM[7:0]
Reset
0
0
0
0
0
0
0
0
Table 137. RFCR1 field descriptions
Field
Description
7-0
FRM[7:0]
Frame Bit Length — The FRM[7:0] control bits select the number of bits in each datagram. The number of
bits is determined by the binary value of the FRM[7:0] bits plus one. This makes the range of bits from 2 to
256. A value of $00 for the FRM[7:0] control bits will result in no frames being sent. The FRM[7:0] control
bits are cleared by RFMRST signal.
15.11 RFM control register 2 — RFCR2
The RFCR2 register contains eight control bits for the RFM as described in
Table 138
.
Table 138. RFM control register 2 (RFCR2) (address $0032)
Bit
7
6
5
4
3
2
1
0
R
W
SEND
RPAGE
EOM
PWR[4:0]
Reset
0
0
0
0
0
0
0
0
Table 139. RFCR2 field descriptions
Field
Description
7
SEND
Transmission Start Control — The SEND control bit starts the transmission of data held in the RFM data
buffer according to the bit length specified by the FRM[7:0] bits. The SEND control bit is automatically
cleared when the data buffer transmission has ended or by the RFMRST signal. A transmission can be
prematurely interrupted by writing a logical zero to the SEND bit.
0 Data transmission ended or transmission not in progress.
1 Start data transmission or transmission in progress.
6
RPAGE
Buffer Page Select — The RPAGE bit will select the lower or upper 16 bytes of the RFM data buffer when
writing/reading to the RFD0-RD15 registers. This bit also selects between the lower and upper banks of
RFM registers at addresses $0038 through $003B. This bit is cleared by a reset of the MCU.
0 Select the lower 16 bytes of the RFM data buffer.
1 Select the upper 16 bytes of the RFM data buffer.
5
EOM
End Of Message — The EOM control bit selects whether there will be two data bit times of data 1 carrier
state at the end of each datagram. The EOM control bit is cleared by a RFMRST.
0 EOM bit times not added.
1 EOM bit times added.
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from