Motorola SE955 Integration Manual page 235

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A - 10 SE955 Integration Guide
TXD
(Host RXD)
RXD
(Host TXD)
RTS
(Host CTS)
CTS
(Host RTS)
1
1. Host requests permission to send
2. Decoder grants permission
3. Host sends 3 nulls, then BEEP command
4. Host removes request when finished sending
5. Decoder removes permission
6. Decoder ACKs
Host Initiated Transmission with Leading Nulls (Decoder in Continuous Power Mode)
Figure A-5
3
2
6
5
4

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