
General Description
MC68HC908GP32 MC68HC08GP32 Data Sheet, Rev. 7
20
Freescale Semiconductor
Two 16-bit, 2-channel timer interface modules (TIM1 and TIM2) with selectable input capture,
output compare, and PWM capability on each channel
8-channel, 8-bit successive approximation analog-to-digital converter (ADC)
BREAK module (BRK) to allow single breakpoint setting during in-circuit debugging
Internal pullups on IRQ and RST to reduce customer system cost
Clock generator module with on-chip 32-kHz crystal compatible PLL (phase-lock loop)
Up to 33 general-purpose input/output (I/O) pins, including:
– 26 shared-function I/O pins
– Five or seven dedicated I/O pins, depending on package choice
Selectable pullups on inputs only on ports A, C, and D. Selection is 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
Higher current 15-mA sink/source capability on PTC0–PTC4
Timebase module with clock prescaler circuitry for eight user selectable periodic real-time
interrupts with optional active clock source during stop mode for periodic wakeup from stop using
an external 32-kHz crystal
Oscillator stop mode enable bit (OSCSTOPENB) in the CONFIG register to allow user selection of
having the oscillator enabled or disabled during stop mode
8-bit keyboard wakeup port
5-mA maximum current injection on all port pins to maintain input protection
40-pin plastic dual-in-line package (PDIP), 42-pin shrink dual-in-line package (SDIP), or 44-pin
quad flat pack (QFP)
Specific features of the MC68HC908GP32 in 40-pin PDIP are:
– Port C is only 5 bits: PTC0–PTC4
– Port D is only 6 bits: PTD0–PTD5; single 2-channel TIM module
Specific features of the MC68HC908GP32 in 42-pin SDIP are:
– Port C is only 5 bits: PTC0–PTC4
– Port D is 8 bits: PTD0–PTD7; dual 2-channel TIM modules
Specific features of the MC68HC908GP32 in 44-pin QFP are:
– Port C is 7 bits: PTC0–PTC6
– Port D is 8 bits: PTD0–PTD7; dual 2-channel TIM modules
1.2.2 Features of the CPU08
Features of the CPU08 include:
Enhanced HC05 programming model
Extensive loop control functions
16 addressing modes (eight more than the HC05)
16-bit index register and stack pointer
Memory-to-memory data transfers
Fast 8
× 8 multiply instruction
Fast 16/8 divide instruction
Binary-coded decimal (BCD) instructions
Optimization for controller applications
Efficient C language support