MC68HC908RF2 Datasheet, PDF (31/254 Pages) Motorola, Inc – HCMOS Microcontroller Unit

General Description
Pin Assignments
1.5.5 Port A Input/Output Pins (PTA7, PTA6/KBD6–PTA1/KBD1, and PTA0)
Port A is an 8-bit special function port that shares its pins with the
keyboard interrupt.
Six port A pins (PTA6–PTA1) can be programmed to serve as an
external interrupt. Once enabled, that pin will contain an internal pullup
resistor.
All port A pins are high-current sink pins.
1.5.6 Port B Input/Output Pins (PTB3/TCLK, PTB2/TCH0, PTB1, and PTB0/MCLK)
Port B is a 4-bit, general-purpose, bidirectional I/O port, with some of its
pins shared with the timer (TIM) module.
1.5.7 UHF Transmitter Pins
The MC68HC908RF2 — Rev. 1 uses dedicated pins for its UHF module.
These pins are described in Table 1-1.
Table 1-1. UHF Transmitter Pins
Pin
Function
Description
6
GND
Ground
7
XTAL1
Reference oscillator input
8
XTAL0
Reference oscillator output
9
REXT
Output amplifier current setting resistor
10
CFSK
FSK switch output
11
V_CC
Power supply
12
RFOUT
Power amplifier output
13
GNDRF Power amplifier ground
14
V_CC
Power supply
15
ENABLE Enable input
16
MODE
Modulation type selection input
17
BAND
Frequency band selection
18
DATA
Data input
19
DATACLK Clock output to the microcontroller
MC68HC908RF2 — Rev. 1
MOTOROLA
General Description
Advance Information
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