AN2262 Motorola / Freescale Semiconductor, AN2262 Datasheet - Page 16

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

AN2262/D
MC33491/MC33493
Control Mode
16
The MC33491/MC33493 has several operation modes. A simple control mode
is useful when only on-off keying (OOK) modulation is required and the
Manchester coding capability of the MC33491/MC33493 is not used. For
detailed information on all modes, refer to the MC33493 Data Sheet (Motorola
order number, MC33493/D).
The microcontroller drives only two pins (PLLEN and DATA). The MODE pin is
wired to GND. Setting PLLEN to 1 enables the PLL; the signal sent to DATA is
then directly transmitted in OOK format. See
This configuration is used in the RF-08 application since the interface is really
minimal and the capability of the CPU allows a direct Manchester encoded data
stream.
PLLEN
UPCLK
PLL
DATA
RF OUT
(OOK)
Supply
current
(not scaled)
Wireless HC08 Modem
Figure 7. Simple Control Mode
Figure
7.
MOTOROLA