MC33493 Motorola, MC33493 Datasheet - Page 4

• Manufacturer Part Number: MC33493
• Description: PLL tuned UHF Transmitter for Data Transfer Applications
• Manufacturer: Motorola

MICROCONTROLLER INTERFACE
Four digital input pins (ENABLE, DATA, BAND and MODE) enable the circuit to be controlled by a
microcontroller. It is recommended to configure the band frequency and the modulation type before enabling the
circuit.
One digital output (DATACLK) provides to the microcontroller a reference frequency for data clocking. This
frequency is equal to the crystal oscillator frequency divided by 64 (see table 2).
STATE MACHINE
Figure 3 details the state machine.
MICROCONTROLLER INTERFACE
4
Crystal Oscillator Frequency (MHz)
Table 2: DATACLK frequency vs crystal oscillator frequency
Freescale Semiconductor, Inc.
Figure 2: Crystal pulling configurations
13.56
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MC33493 Technical Data
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DATACLK Frequency (kHz)
154
212
MOTOROLA