AN2262 Motorola / Freescale Semiconductor, AN2262 Datasheet - Page 4

• Manufacturer Part Number: AN2262
• Description: Wireless HC08 Modem
• Manufacturer: Motorola / Freescale Semiconductor

AN2262/D
Radio Frequency
(RF)
Circuit Description
4
For wireless communication, the Motorola RF chip set is used.
These low-cost, single-channel chips for ISM bands were originally designed
for key fob applications used in the car industry. The high integration, low
component count, no RF adjustment, and low cost allow its use in such cost-
sensitive applications like home connectivity.
The main features of the MC33493/MC33591/3 family are:
A schematic of the RF-08 demo board is provided in
MC68HC908GP32 MCU itself needs only a few external elements for its
operation. A wide range of peripheral functions including a 32-Kbyte FLASH
memory are integrated on-chip. For the RF-08, the 44-pin quad flat pack (QFP)
version was chosen instead of the 40-pin dual in-line package (DIP).
1. The MC33491 (code name Tango II) is no longer available. The MC33493 (code name
Tango III) is it’s full replacement. The MC33493 input pins are not specified above V
voltage. Thus, the MC33493 cannot be used within described RF-08 schematics that employ
R1 and R3 serial resistors to protect the MC33493 3-V interface. For interfacing between an
5 V MCU and 3 V MC33493 a proper level shifter must be designed or a different configuration
used. For a more detailed description, refer to the
on page
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MC33493 (transmitter)
MC33591/3 (receiver)
Selectable 315/434/868/915 MHz operation
Single-channel, OOK (on-off keying), or FSK (frequency shift keying)
operation
Fully-integrated voltage controller oscillator (VCO)
Data rate: 1 to 11 kBaud
A transmitter: MC33493
–
–
A receiver: MC33591/3
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–
–
–
–
36.
14-pin thin shrink small outline package (TSSOP)
Low current consumption: 15 mA typical in transmit mode
24-pin low-profile quad flat pack (LQFP)
Low current consumption: 5 mA typical in run mode
An image-cancelling mixer
Manchester coded data clock recovery
Fully-configurable using the serial peripheral interface (SPI)
Wireless HC08 Modem
(1)
(1)
MC33491 to MC33493 Migration Notes
Figure
2. The
MOTOROLA
CC