MC68HC908GR8A_07 Datasheet, PDF (20/260 Pages) Freescale Semiconductor, Inc – Microcontrollers

General Description
• Master reset pin and power-on reset (POR)
• 7680 bytes of on-chip FLASH memory on the MC68HC908GR8A and 4096 byes of on-chip FLASH
memory on the MC68HC908GR4A with in-circuit programming capabilities of FLASH program
memory.
• 384 bytes of on-chip random-access memory (RAM)
• 544 bytes of FLASH programming routines read-only memory (ROM)
• Serial peripheral interface (SPI) module
• Serial communications interface (SCI) module
• One 16-bit, 2-channel timer (TIM1) and one 16-bit, 1-channel timer (TIM2) interface modules with
selectable input capture, output compare, and pulse-width modulation (PWM) capability on each
channel
• Up to 6-channel, 8-bit successive approximation analog-to-digital converter (ADC) depending on
package choice
• BREAK (BRK) module to allow single breakpoint setting during in-circuit debugging
• Internal pullups on IRQ and RST to reduce system cost
• Up to 21 general-purpose input/output (I/O) pins
• 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/source capability on all port pins
• Higher current 15-mA sink/source capability on PTC0–PTC1
• Timebase module (TBM) 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 crystal
• User selection of having the oscillator enabled or disabled during stop mode
• 4-bit keyboard wakeup port
• Available packages:
– 32-pin low-profile quad flat pack (LQFP)
– 28-pin plastic dual in-line package (DIP)
– 28-pin small outline integrated circuit (SOIC)
• Specific features of the MC68HC908GR8A in 28-pin DIP and 28-pin SOIC are:
– Port B is only 4 bits: PTB0–PTB3; 4-channel ADC module
– No port C bits
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
MC68HC908GR8A • MC68HC908GR4A Data Sheet, Rev. 5
20
Freescale Semiconductor