NXP Semiconductors
FXTH87E
FXTH87E, Family of Tire Pressure Monitor Sensors
3.4 Reference documents
The FXTH87E utilizes the standard product MC9S08 CPU core. For further details on the
full capabilities of this core, refer to the HCS08 Family Reference Manual (HCS08RMV1).
4 Pinning information
This section describes the pin layout and general function of each pin.
4.1 Pinning
The pinout for the FXTH87E device QFN package is shown in Figure 3 for the orientation
of the pressure port up. The orientation of the internal Z-axis accelerometer is shown in
Figure 4.
Transparent top view
ID feature
on top lid
PTB1
PTA2
PTA1
PTA0
RESET
VSS
1
2
3
4
5
6
18 PTA3
17 LFA
+Y
Y-axis
orientation
16 LFB
- Y
15 BKGD/PTA4
14 X0
X-axis
orientation
- X
+X
13 X1
aaa-027991
N/C = No Connect: Do not connect PCB pads to signal traces, power/ground or multi-layer via.
Figure 3.ꢀFXTH87E QFN package pinout
Side view
+Z
Pressure port
Z-axis
orientation
- Z
Positive acceleration moves mass
in +Z direction (value increases)
aaa-027993
Figure 4.ꢀFXTH87E QFN optional Z-axis accelerometer orientation
FXTH87ERM
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© NXP B.V. 2019. All rights reserved.
Reference manual
Rev. 5.0 — 4 February 2019
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