■DESCRIPTION

The MB89940 series is specially designed for automotive instrumentation applications. It features a combination of two PWM pulse generators and four high-drive-current outputs for controlling a stepping motor. It also contains two analog inputs, two PWM pulse generators and 10-digit LCD controller/driver for various sensor/indicator devices. The MB89940 series is manufactured with high performance CMOS technologies and packaged in a 48-pin QFP.

■FEATURES

• 8-bit core CPU: 4 MHz system clock (8 MHz external, 500 ns instruction cycle)

• 21-bit timebase timer

• Watchdog timer

• Clock generator/controller

• 16-bit interval timer

• Two PWM pulse generators with four high-drive-current outputs

• Two-channel 8-bit A/D converter

• Three external interrupt

• Low supply voltage reset

• External voltage monitor interrupt

• Two more PWM pulse generators for controlling indicator devices

• 4-common 17-segment LCD driver/controller

• Package: 48-pin plastic QFP, 48-pin ceramic MQFP

• 5.0 V single power supply (VPPrequired for MB89P945)

• On-chip voltage regulator for internal 3.0 V power supply (MB89943, MB89945)