Freescale Semiconductor M68HC08 manual bitkeyboard interrupt

The MC68HC908LB8 Microcontroller

•Dual channel high resolution PWM (HRP) with deadtime insertion and shutdown input to perform light control and dimming functions for ballasts. The outputs use frequency dithering to achieve a 3.9 ns output resolution.

•Dual channel pulse width modulator module to provide power factor correction capability

•7-channel, 8-bit successive approximation analog-to-digital converter (ADC)

•Comparator for power factor correction capability or for general-purpose use

•7-bit keyboard interrupt

•One 16-bit, 2-channel timer interface module with one output available on port pin (PTA6) for input capture and PWM

•17 general-purpose input/output (I/O) pins and one input-only pin

– Three shared with HRP module

– Three shared with PWM module

– Three shared with comparator

– Seven shared with ADC module (AD[0:6])

– One shared with timer channel 0

– Two shared with OSC1 and OSC2

– One shared with reset

– Seven shared with keyboard interrupt

– One input-only pin shared with external interrupt (IRQ)

•Available packages:

– 20-pin small outline integrated chip (SOIC) package

– 20-pin plastic dual in-line package (PDIP)

•On-chip programming firmware for use with host personal computer which does not require high voltage for entry

•System protection features:

– Optional computer operating properly (COP) reset

– Low-voltage reset

– Illegal opcode detection with reset

– Illegal address detection with reset

•Low-power design; fully static with stop and wait modes

•Standard low-power modes of operation:

– Wait mode

– Stop mode

•Master reset pin and power-on reset (POR)

•674 bytes of FLASH programming routines in read-only memory (ROM)

•Break module (BRK) to allow single breakpoint setting during in-circuit debugging

•Internal pullup on RST pin to reduce customer system cost

•Selectable pullups on ports A and C

– Selection on an individual port bit basis

– During output mode, pullups are disengaged

•High current 10 mA sink / 10 mA source capability on all port pins

Dimmable Light Ballast with Power Factor Correction, Rev. 1

Freescale Semiconductor 9