MC68HC908RF2 Datasheet, PDF (28/254 Pages) Motorola, Inc – HCMOS Microcontroller Unit

M68HC08 CPU
CPU
REGISTERS
ARITHMETIC/LOGIC
UNIT (ALU)
INTERNAL BUS
SECURITY
MODULE
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
COMPUTER OPERATING PROPERLY
MODULE
LOW-VOLTAGE INHIBIT
MODULE
2-CHANNEL TIMER
MODULE
RST*
IRQ1*
V_DD
V_SS
SYSTEM INTEGRATION
MODULE
KEYBOARD/INTERRUPT
MODULE
POWER-ON RESET
MODULE
POWER
UHF
TRANSMITTER
* PIN CONTAINS INTEGRATED PULLUP RESISTOR
** HIGH CURRENT SINK PIN
‡ _{PIN CONTAINS SOFTWARE SELECTABLE PULLUP RESISTOR}
Figure 1-1. MC68HC908RF2 MCU Block Diagram
V_CC
MODE
ENABLE
DATA
BAND
RFOUT
GNDRF
REXT
XTAL1
XTAL0
DATACLK
CFSK
PTA7**
PTA6/KBD6^‡**
PTA5/KBD5^‡**
PTA4/KBD4^‡**
PTA3/KBD3^‡**
PTA2/KBD2^‡**
PTA1/KBD1^‡**
PTA0**
PTB3/TCLK
PTB2/TCH0
PTB1
PTB0/MCLK