mc68hc908gt8 Freescale Semiconductor, Inc, mc68hc908gt8 Datasheet - Page 22

• Manufacturer Part Number: mc68hc908gt8
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

General Description
22
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
System protection features:
–
–
–
–
Low-power design; fully static with stop and wait modes
Standard low-power modes of operation:
–
–
Master reset pin and power-on reset (POR)
16 Kbytes of on-chip 100k cycle write/erase capable Flash memory (8 Kbytes on
MC68HC908GT8)
512 bytes of on-chip random-access memory (RAM)
720 bytes of Flash programming routines ROM
Serial peripheral interface module (SPI)
Serial communications interface module (SCI)
Two 16-bit, 2-channel timer interface modules (TIM1 and TIM2) with selectable input capture,
output compare, and pulse-width modulation (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
Up to 36 general-purpose input/output (I/O) pins, including:
–
–
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 20-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 or internal oscillator
User selection of having the oscillator enabled or disabled during stop mode
8-bit keyboard wakeup port
Available packages:
–
–
Specific features of the MC68HC908GT16 in 42-pin SDIP are:
–
–
Specific features of the MC68HC908GT16 in 44-pin QFP are:
–
–
Optional computer operating properly (COP) reset
Low-voltage detection with optional reset and selectable trip points for 3.0-V and 5.0-V
operation
Illegal opcode detection with reset
Illegal address detection with reset
Wait mode
Stop mode
28 shared-function I/O pins
Six or eight dedicated I/O pins, depending on package choice
42-pin shrink dual in-line package (SDIP)
44-pin quad flat pack (QFP)
Port C is only 5 bits: PTC0–PTC4
Port D is 8 bits: PTD0–PTD7; dual 2-channel TIM modules
Port C is 7 bits: PTC0–PTC6
Port D is 8 bits: PTD0–PTD7; dual 2-channel TIM modules
MC68HC908GT16 • MC68HC908GT8 • MC68HC08GT16 Data Sheet, Rev. 5.0
Freescale Semiconductor