1 General description

The NTM88 family consists of small (4 mm x 4 mm x 1.98 mm), fully integrated tire pressure monitoring sensors (TPMS). The devices described in this data sheet, NTM88Hxx5S, provide low transmitting power consumption, large customer memory size, and single- or dual-axis accelerometer architecture. The NTM88Hxx5S TPMS solution integrates an 8-bit microcontroller (MCU), pressure sensor, accelerometers in five ranges, programmable RF transmitter and flexible LF receiver. The sensor supports seven GPIOs, client SPI, and a 2-channel timer / pulse-width module.

2 Features and benefits

• Optional pressure ranges1

• Optional accelerometer ranges: See Section 3.

• 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

• Flexible 125 kHz LF receiver:

– Capability for ASK or OOK demodulation

– Automated Manchester decoding

• Two channel timer / pulse-width module

• Client SPI to support host access to internal peripherals, registers, and memory

• Seven GPIOs with programmable multiplexing to support software development, external analog voltage

input, timer, SPI, and wake-up

• Qualified in compliance with AEC-Q100, Rev. H

• Long battery service life

• Internal temperature sensor

• Internal voltage sensor

• Six-channel, 8-, 10-, or 12-bit analog-to-digital converter (ADC10) with two external I/O inputs

• Internal 315-/434-M Hz RF transmitter

– External crystal oscillator

– PLL-based output with fractional-n divider

– OOK and FSK modulation capability

– Programmable data rate generator

– Manchester, Bi-Phase, or NRZ data encoding

– 256-bit RF data buffer variable length interrupt

– Direct access to RF transmitter from MCU for unique formats

– Low-power consumption

• Differential input LF detector/decoder on independent signal pins

• Real-time Interrupt driven by LFO with intervals of 2, 4, 8, 16, 32, 64, or 128 ms

• Free-running counter, low-power, wake up timer and periodic reset driven by LFO

• Watchdog timeout with selectable times and clock sources

• Two-channel general-purpose timer/PWM module (TPM1)

• Internal oscillators

– MCU bus clock of 0.5, 1, 2, and 4 MHz (1, 2, 4, and 8 MHz HFO)

– Low frequency, low-power time clock (LFO) with 1 ms period

– Medium frequency, controller clock (MFO) of 8 μs period

• Low-voltage detection

NTM88H155ST1属于传感器，变送器 > 压力传感器、变送器。恩智浦半导体公司制造生产的NTM88H155ST1压力传感器、变送器压力传感器或变送器用于检测并响应器件上作用力的存在或量变。压力类型有绝对压力、复合压力、差压、表压、密封表压、开关、真空和排气表压，工作压力为 -100 PSI (-689.48 kPa) 至 20000 PSI (137895.15 kPa)。