AN1833 Freescale Semiconductor / Motorola, AN1833 Datasheet - Page 28

• Manufacturer Part Number: AN1833
• Description: A Low-Power Wireless Remote Control Transmitter and Receiver
• Manufacturer: Freescale Semiconductor / Motorola

Application Note
28
RESET SOFTWARE FLAGS
INCREMENT INDEX
BUFFER INDEX = 0
check_msg_format
BUFFER (INDEX)
INDEX COUNT
COUNT
= 55?
= 3?
look
NO
NO
Figure 13. Receiver MCU Flowchart (Sheet 3 of 3)
YES
YES
Freescale Semiconductor, Inc.
(COMMAND BYTE)
BUFFER (INDEX)
BUFFER (INDEX)
BUFFER INDEX
For More Information On This Product,
NO
NO
toggle
= FA?
= FB?
= 4
DID NOT RECEIVE
VALID PREAMBLE
FLAG SET
SET FLAG
Go to: www.freescale.com
?
NO
YES
YES
BUFFER INDEX VALUE
EXPECTED DATA
Fx = UNIT ADDRESS
Fy = COMMAND
xx = DON’T CARE
YES
TURN OFF I/O PIN
TURN ON I/O PIN
YES
YES
RECEIVE BUFFER DIAGRAM
(ADDRESS BYTE)
BUFFER (INDEX)
BUFFER (INDEX)
BUFFER INDEX
= ADDRESS?
= B’CAST?
prev55
= 3
55
0
NO
NO
55
1
55
2
DEFECTIVE COMMAND BYTE
NOT THIS UNIT’S ADDRESS
Fx
3
main
Fy
4
SEE SHEET 1
xx
5
MOTOROLA
AN1833