AN2818 Freescale Semiconductor / Motorola, AN2818 Datasheet - Page 16

• Manufacturer Part Number: AN2818
• Description: Romeo2 Monitor for the MC68HC908AP64 MCU
• Manufacturer: Freescale Semiconductor / Motorola

RF Message Formats
Figure 9
(11111111 binary).
Receiving Messages With Header Field
To receive a message with an ID of 0x55 (01010101 binary), with a header field (0110 binary), at data
rate of 1000 bps, OOK modulation, 434 MHz carrier frequency:
16
4. Set LNA pin to logic 1 using command LNA 1 <return>.
5. Set STROBE pin to logic 1 using command STROBE 1 <return>.
6. Set AGC pin to logic 1 using command AGC 1 <return>.
7. Enable reception of messages using command RECEIVE. This sets the reset pin to logic 1, and
1. Set CR1 register to value 0xDB using command CR1 DB <return>.
MG = 0 (normal mixer gain)
MS = 0 (mixout pin set to mixer output)
PG = 1 (phase comparator gain = low gain mode)
the Romeo2 monitor will display any received data.
This configures the following bits:
shows the above setup after reception of a message containing one byte of data with value 0xff
When receiving messages where the number of data bits is an exact
multiple of eight, Romeo2 may add an extra byte to the end of the message.
Figure 9. Receiving FSK Message Without Header
Romeo2 Monitor for the MC68HC908AP64 MCU, Rev. 0
NOTE
Freescale Semiconductor