Advance Information MC68HC908MR16/MC68HC908MR32 — Rev. 4.0

32 General Description MOTOROLA

General Description
Figure 1-1. MCU Block Diagram
CLOCK GENERATOR
MODULE
SYSTEM INTEGRATION
MODULE
SERIAL COMMUNICATIONS INTERFACE
MODULE
SERIAL PERIPHERAL INTERFACE
MODULE(2)
TIMER INTERFACE
MODULE A
LOW-VOLTAGE INHIBIT
MODULE
POWER-ON RESET
MODULE
COMPUTER OPERATING PROPERLY
MODULE
ARITHMETIC/LOGIC
UNIT
CPU
REGISTERS
M68HC08 CPU
CONTROL AND STATUS REGISTERS — 112 BYTES
USER FLASH — 32,256 BYTES
USER RAM — 768 BYTES
MONITOR ROM — 240 BYTES
USER FLASH VECTOR SPACE — 46 BYTES
IRQ
MODULE
POWER
PTA
DDRA
DDRB
PTB
DDRC
PTCPTD
DDRE
PTE
PTF
DDRF
INTERNAL BUS
OSC1
OSC2
CGMXFC
RST
IRQ
VSS
VDD
VDDA
PTA7–PTA0
PTE7/TCH3A
PTE6/TCH2A
PTE5/TCH1A
PTE4/TCH0A
PTE3/TCLKA
PTE2/TCH1B(1)
PTE1/TCH0B(1)
PTE0/TCLKB(1)
PTF5/TxD
PTF4/RxD
PTF3/MISO(1)
PTF2/MOSI(1)
PTF1/SS(1)
PTF0/SPSCK(1)
TIMER INTERFACE
MODULE B
PULSE-WIDTH MODULATOR
MODULE
PTB7/ATD7
PTB6/ATD6
PTB5/ATD5
PTB4/ATD4
PTB3/ATD3
PTB2/ATD2
PTB1/ATD1
PTB0/ATD0
PTC6
PTC5
PTC4
PTC3
PTC2
PTC1/ATD9(1)
PTC0/ATD8
PTD6/IS3
PTD5/IS2
PTD4/IS1
PTD3/FAULT4
PTD2/FAULT3
PTD1/FAULT2
PTD0/FAULT1
PWM6–PWM1
ANALOG-TO-DIGITAL CONVERTER
MODULE
VSSA
VDDA
VSSA(3)
PWMGND
VREFL(3
VREFH
Notes:
1. These pins are not available in the 56-pin SDIP package.
2. This module is not available in the 56-pin SDIP package.
3. In the 56-pin SDIP package, these pins are bonded together.
SINGLE BRKPT BREAK
MODULE