Datasheet

MC68HC908JL3E Family Data Sheet, Rev. 4
176 Freescale Semiconductor
Figure C-1. MC68HC908KL3E/KK3E Block Diagram
SYSTEM INTEGRATION
MODULE
ARITHMETIC/LOGIC
UNIT (ALU)
CPU
REGISTERS
M68HC08 CPU
CONTROL AND STATUS REGISTERS — 64 BYTES
USER FLASH — 4,096 BYTES
USER RAM — 128 BYTES
MONITOR ROM — 960 BYTES
USER FLASH VECTOR SPACE — 48 BYTES
EXTERNAL INTERRUPT
MODULE
INTERNAL BUS
* RST
* IRQ
POWER
VSS
2-CHANNEL TIMER INTERFACE
MODULE
KEYBOARD INTERRUPT
MODULE
VDD
DDRB
PORTB
PTB7
PTB6
PTB5
PTB4
PTB3
PTB2
PTB1
PTB0
DDRA
PORTA
PTA5/KBI5**
‡
PTA4/KBI4**
‡
PTA3/KBI3**
‡
PTA2/KBI2**
‡
PTA1/KBI1**
‡
PTA0/KBI0**
‡
LOW-VOLTAGE INHIBIT
MODULE
* Pin contains integrated pull-up device.
** Pin contains programmable pull-up device.
† 25mA open-drain if output pin.
‡ LED direct sink pin.
OSC1
OSC2
X-TAL OSCILLATOR
DDRD
PORTD
PTD7**
†‡
PTD6**
†‡
PTD5/TCH1
PTD4/TCH0
PTD3
‡
PTD2
‡
PTD1
PTD0
COMPUTER OPERATING
PROPERLY MODULE
POWER-ON RESET
MODULE
BREAK
MODULE
#
#
# Pins available on MC68HC908KL3E only.