User manual

MCP2030 Bidirectional Communication Demo Kit User’s Guide
© 2006 Microchip Technology Inc. DS51637A-page 17
FIGURE 3-4: Communication Flow-Chart of the Transponder Demo Board.
Power-up
Input Signal in?
Input Signal
Disappeared for
> 16 ms?
No
Yes
No
Yes
Soft Reset
MCU Programs the MCP2030
Configuration Registers
MCU Configure the MCP3421 ADC
for One-Shot and 16 bit Mode
Meet wake-up
Send I
2
C Read Command
Yes
No
MCU in Sleep Mode
while the MCP2030 detects input signals
Button Pressed?
No
Yes
Send Response via
RF Link
to the MCP3421 for RSSI
Encode the SW event data
SW3: Unlock Door
SW4: Lock Door
Yes
ALERT
pin High?
No
MCU wakes up
filter?
MCU wakes up