The MPXY8300 Series is a 20-pin sensor for use in applications that monitor tire

pressure and temperature. It contains the pressure, temperature and 2-axis

accelerometer sensors, a microcontroller, and an RF output all within a single

package. The MPXY8300 Series is comprised of the following functions all within the same package.

Features

• Pressure sensor with signal interface to ADC10

• Temperature sensor with signal interface to ADC10

• Z- and X-axis accelerometers with signal interface to ADC10

• Voltage reference measured by ADC10

• 4-channel, 10-bit analog-to-digital converter

• 8-bit MCU

– S08 Core with SIM, interrupt and debug/monitor

– 512 RAM

– 8K FLASH (in addition to 8K providing factory firmware and trim

data)

– 32-byte, low power, parameter registers

• Internal 315/434 MHz RF transmitter

– External crystal oscillator

– PLL-based output with fractional-n divider

– ASK and FSK modulation capability

– Programmable data rate generator

– Manchester or bi-phase data encoding

– 128-bit RF data buffer with RTS/CTS handshake

– Direct access to RF transmitter from MCU for unique formats

– Supply voltage charge pump to compensate for cold batteries

with selectable charge times (30, 60, 120 and 240 msec)

• Differential input LF detector/decoder

• 4 GPIO pins with optional pull-ups/pull-downs and wake-up interrupt

• Real Time Interrupt driven by LFO with interrupt intervals of

8, 16, 32, 64, 128, 256, 512 or 1024 msec

• Low power wake-up timer and periodic reset driven by LFO

• Watchdog time-out with selectable times and clock sources

• 2-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)

– Charge pump clock of 10 MHz

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

– Medium frequency, LFR decoder and sensor clock (MFO) of

8 μsec period

• Low voltage detection

• Normal temperature restart in hardware (over temperature detected by software)