MC13190FC Freescale Semiconductor, MC13190FC Datasheet - Page 15

• Manufacturer Part Number: MC13190FC
• Manufacturer: Freescale Semiconductor

Specifications of MC13190FC

• Operating Temperature (min): 0C
• Operating Temperature Classification: Commercial
• Lead Free Status / Rohs Status: Compliant

Application Information
2.0"
Figure 10. Transceiver Circuit PCB Bottom Side
(Active Dielectric = 10 mil FR4, Total Board Thickness = 0.062”)
3.5 Baseband Interface
Referring again to Figure 1, the Simplified Block Diagram, the baseband interface is accomplished
through the Logic Interface block. TX_DATA and RX_DATA provide the data interface. The MC13190 is
designed to transmit and receive 5 Mbps Manchester encoded data. Data rates of between 4 and 6 Mbps are
acceptable. The data pulses should be between 100 and 200 ns duration. The MC13190 does not provide
encoding or decoding. The baseband device chosen must be capable of encoding and decoding a 5 Mbps
data stream. FREF can be supplied by the baseband and can be “warped” or “dithered” to provide
frequency variation.
The remaining five control lines are controlled through GPIO lines.
3.5.1 Low Data Rate Applications
For low data rate applications, an alternate approach can be used to employ a low-cost microcontroller.
Figure 11 shows the basic principals. A Motorola MC68HC908GR8 is shown but the same approach can
be used with any MCU that is capable of performing the required task. The system reference frequency is
chosen to be the 9.537 MHz required for the MC13190’s transmit synthesizer. The reference is also fed to
a programmable divider which becomes an FSK generator controlled by the transmit data from the MCU.
F1 will be 4.769 MHz while F2 will be 2.384 MHz. These frequencies AM modulate the 2.44 GHz carrier
as though they were data. On the receive side, RX_DATA drives a peak detector tuned for F1. F1 therefore
MOTOROLA
MC13190 Advance Information
15