MC68HC908KX8 Datasheet, PDF (299/310 Pages) Motorola, Inc – Microcontrollers

M68HC08 CPU
CPU
REGISTERS
ARITHMETIC/LOGIC
UNIT
INTERNAL BUS
POWER-ON RESET
MODULE
CONTROL AND STATUS REGISTERS — 78 BYTES
SECURITY
MODULE
USER ROM — 7680 BYTES
USER RAM — 192 BYTES
MONITOR ROM — 296 BYTES
USER ROM VECTOR SPACE — 36 BYTES
IRQ1 ⁽¹⁾
V_DD
V_SS
INTERNAL CLOCK GENERATOR
MODULE
SOFTWARE SELECTABLE
SYSTEM INTEGRATION
MODULE
IRQ
MODULE
POWER
COMPUTER OPERATING PROPERLY
MODULE
LOW-VOLTAGE INHIBIT
MODULE
2-CHANNEL TIMER INTERFACE
MODULE
KEYBOARD INTERRUPT
MODULE
ANALOG-TO-DIGITAL CONVERTER
MODULE
SERIAL COMMUNICATION INTERFACE
MODULE
PROGRAMMABLE TIMEBASE
MODULE
SINGLE BRKPT BREAK
MODULE
Notes:
1. Pin contains integrated pullup resistor.
2. High-current source/sink pin
3. Pin contains software selectable pullup resistor if general function I/O pin is configured as input.
4. Pins are used for external clock source or crystal/ceramic resonator option.
Figure B-1. M68HC08KX8 MCU Block Diagram
PTB0/AD0
PTB1/AD1
PTB2/AD2
PTB3/AD3
PTB4/RxD
PTB5/TxD
PTB6/(OSC1)⁽⁴⁾
PTB7/(OSC2)⁽⁴⁾
PTA0/KBD0^{(2), (3)}
PTA1/KBD1^{(2), (3)}
PTA2/KBD2/TCH0^{(2), (3)}
PTA3/KBD3/TCH1^{(2), (3)}
PTA4/KBD4 ^{(2), (3)}