NXP Semiconductors
UM11227
NTM88 family of tire pressure monitor sensors
UM11227 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2020. All rights reserved.
User manual Rev. 6 — 24 April 2020
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7 Pinning information
This section describes the pin layout and general function of each pin.
7.1 Pinout
aaa-031048
RFOUT
Transparent top view
Pin 1
index area
RFGND
PTA1
PTA2
PTA3
PTB0
9
n.c. 1
n.c.
2
n.c. 3
n.c.
4
n.c. 5
n.c. 6
RSTB
8
VDDA 9
GND
10
VDD 11
VREG 12
18
17
16
15
14
13
Figure 3. NTM88 QFN package pinout
7.2 Pin description
Table 5. Pin description
Symbol Pin Function Description
n.c. 1 — Do not connect electrical signals to this pin; solder joint only.
n.c. 2 — Do not connect electrical signals to this pin; solder joint only.
n.c. 3 — Do not connect electrical signals to this pin; solder joint only.
n.c. 4 — Do not connect electrical signals to this pin; solder joint only.
n.c. 5 — Do not connect electrical signals to this pin; solder joint only.
n.c. 6 — Do not connect electrical signals to this pin; solder joint only.
PTA4 7 PTA4 / BKGD PTA4 Pin - The PTA4 pin places the device in the BACKGROUND DEBUG
mode (BDM) to evaluate MCU code and transfer data to/from the internal
memory. If the BKGD/PTA4 pin is held low when the device comes out of a
power-on-reset (POR), the device switches into the ACTIVE BACKGROUND
DEBUG mode (BDM).
The BKGD/PTA4 pin has an internal pullup device or can be connected to
VDD in the application, unless there is a need to enter BDM operation after
the device as been soldered into the PWB. If in-circuit BDM is desired, the
BKGD/PTA4 pin should be connected to VDD through a resistor (~10 kΩ
or greater) which can be over-driven by an external signal. This resistor
reduces the possibility of inadvertently activating the debug mode in the
application due to an EMC event.
When the application programs port A to GPIOs, PTA4 becomes output-only.
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