NXP Semiconductors
FXTH87E
FXTH87E, Family of Tire Pressure Monitor Sensors
3 General Information
3.1 Overall block diagram
The block diagram of the FXTH87E is shown in Figure 1. This diagram covers all the
main blocks mentioned above and their main signal interactions. Power management
controls and bus control signals are not shown in this block diagram for clarity.
MCU
TRANSDUCERS
SMI
PWU
TIMER
PRESS
SENSOR
P
LFO
LFO
1 ms
XZ
ACCEL
(OPTION)
Z
RTI
TIMER
ACCEL
(OPTION)
VSENS
OSC
LVD
XZ
Z
BKGD/
PTA4
MCU CORE
S08
TEMP
RESTART
VDD
VDD
ADC10
10-BIT
6-CHAN
VTP
V0
TEMP
SENSOR
AVDD
AVDD
AVSS
VSS
TEMP
64-BYTE
PARAMETER
REGISTER
HFO
1, 2, 4,
or 8 MHZ
BANDGAP
REF
MFO
MFO
RAM
MEMORY
512
8
s
V1
VREG
V2
USER
FLASH
RESET
AVDD
MEMORY
FIRMWARE
MEMORY
VOLT
REG
VREG
RFVDD
TPM1
TIMER/PWM
2-CHAN
DX
BIT
RATE
GEN
XI
XTAL
OSC
XO
RF LVD
LF
RECVR
(LFR)
LFA
LFB
LFI
256-BIT
DATA
BUFFER
FREE-RUNNING
COUNTER
VCO/PLL
FRACTL
DIVIDER
DATA
ENCODE
PTA0
PTA1
PTA2
PTA3
PTB0
PTB1
RF
RF
AMP
RVSS
GP
I/O
KEYBOARD
WAKEUP
KBI
RFM
aaa-027989
Figure 1.ꢀFXTH87E overall block diagram
FXTH87ERM
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© NXP B.V. 2019. All rights reserved.
Reference manual
Rev. 5.0 — 4 February 2019
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