MC68HC908RK2 Datasheet, PDF (26/232 Pages) Motorola, Inc – Microcontroller Unit

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
RST*
IRQ1*
SYSTEM INTEGRATION
MODULE
KEYBOARD/INTERRUPT
MODULE
POWER-ON RESET
MODULE
V_DD
POWER
V_SS
* PIN CONTAINS INTEGRATED PULLUP RESISTOR
** HIGH CURRENT SINK PIN
‡ _{PIN CONTAINS SOFTWARE SELECTABLE PULLUP RESISTOR}
INTERNAL BUS
SECURITY
MODULE
COMPUTER OPERATING PROPERLY
MODULE
LOW-VOLTAGE INHIBIT
MODULE
2-CHANNEL TIMER
MODULE
Figure 1-1. MC68HC908RK2 MCU Block Diagram
PTA7**
PTA6/KBD6^‡**
PTA5/KBD5^‡**
PTA4/KBD4^‡**
PTA3/KBD3^‡**
PTA2/KBD2^‡**
PTA1/KBD1^‡**
PTA0**
PTB5
PTB4/TCH1
PTB3/TCLK
PTB2/TCH0
PTB1
PTB0/MCLK