MC68HC908RK2 Datasheet, PDF (84/158 Pages) Motorola, Inc – Microcontroller Unit

Keyboard/External Interrupt Module (KBI)
M68HC08 CPU
CPU
REGISTERS
ARITHMETIC/LOGIC
UNIT (ALU)
CONTROL AND STATUS REGISTERS — 32 BYTES
USER FLASH — 2031 BYTES
USER RAM — 128 BYTES
MONITOR ROM — 768 BYTES
USER FLASH VECTOR SPACE — 14 BYTES
OSC2
OSC1
SOFTWARE SELECTABLE
INTERNAL OSCILLATOR
MODULE
INTERNAL BUS
SECURITY
MODULE
COMPUTER OPERATING
PROPERLY MODULE
LOW-VOLTAGE INHIBIT
MODULE
2-CHANNEL TIMER
MODULE
RST⁽¹⁾
IRQ⁽¹⁾
SYSTEM INTEGRATION
MODULE
KEYBOARD/INTERRUPT
MODULE
POWER-ON RESET
MODULE
V_DD
POWER
V_SS
1. Pin contains integrated pullup resistor
2. High current sink pin
3. Pin contains software selectable pullup resistor
Figure 7-1. Block Diagram Highlighting KBI Block and Pins
PTA7⁽²⁾
PTA6/KBD6^{(2) (3)}
PTA5/KBD5^{(2) (3)}
PTA4/KBD4^{(2) (3)}
PTA3/KBD3^{(2) (3)}
PTA2/KBD2^{(2) (3)}
PTA1/KBD1^{(2) (3)}
PTA0⁽²⁾
PTB5
PTB4/TCH1
PTB3/TCLK
PTB2/TCH0
PTB1
PTB0/MCLK
MC68HC908RK2 Data Sheet, Rev. 5.1
84
Freescale Semiconductor