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)