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
6 / 183
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
.
PTA3
LFA
LFB
BKGD/PTA4
X0
X1
PTB1
PTA2
PTA1
RESET
VD
D
VD
D
A
VS
SA
VR
EG
R
F
PT
B0
N
/C
N
/C
N
/C
N
/C
N
/C
ID feature
on top lid
PTA0
VSS
R
FV
SS
Transparent top view
BKGD/PTA4
+X
- X
aaa-027991
X-axis
orientation
+Y
- Y
7
8
10
11
12
9
24
23
21
20
19
22
1
2
4
5
6
3
18
17
15
14
13
16
Y-axis
orientation
N/C = No Connect: Do not connect PCB pads to signal traces, power/ground or multi-layer via.
Figure 3. FXTH87E QFN package pinout
aaa-027993
Z-axis
orientation
+Z
- Z
Side view
Pressure port
Positive acceleration moves mass
in +Z direction (value increases)
Figure 4. FXTH87E QFN optional Z-axis accelerometer orientation
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