NXP Semiconductors UM11227 User Manual

1

Introduction

1.1 Purpose

1.2 Audience

2

General description

3

Features and benefits

UM11227
NTM88 family of tire pressure monitor sensors
Rev. 6 — 24 April 2020
This user manual describes the features, architecture, and programming model of the
NTM88 family of devices.
This document is primarily for system architects and software application developers who
are using or considering the use of the NTM88 in a system.
The NTM88 is a small (4 mm x 4 mm x 1.98 mm), fully integrated tire pressure monitoring
sensor (TPMS). It also provides low transmitting power consumption, large customer
memory size, and a choice of either dual- or single-axis accelerometer architecture.
The NTM88 TPMS solution integrates an 8-bit microcontroller (MCU), pressure sensor,
accelerometer, and RF transmitter.
• Pressure range: 90 kPa to 930 kPa
• Optional single- or dual-axis accelerometer ranges
• Optional accelerometer range: See
• Transducer measurement interfaces with low-power AFE:
–
10-bit compensated pressure sense element
– 10-bit compensated accelerometers
– 8-bit compensated internal device temperature measurement
–
8-bit compensated internal device voltage measurement
– Two I/O pins can be used for external signals
• 8-bit S08 compact instruction set controller:
–
64 bytes low-power "always on" NVM parameter registers
– 512 bytes SRAM
– 16 kB flash memory (512 bytes reserved for NXP coefficients)
–
Family of NXP firmware libraries available via royalty-free license
• Programmable RF transmitter
– Characterized for RF carrier typical of 315 MHz or 434 MHz
–
Characterized for FSK in ~3 kHz increments or OOK modulation
– Characterized for baud rate examples of 9.6 kbp/s, 19.2 kbp/s, and 38.4 kbp/s
Consult NXP sales for details or specific requests.
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Section 4.
User manual