Sharp XG-V10WU Technical Manual page 59

Special data transmission between main and sub-microprocessor
Switching to special data transmission system
Normal data transmission system
SCK0
(Notify entry to special data transmission system)
TXD0
RXD0
SHREQ
BINARY
Special data transmission system
(Example of transmission from sub to main)
SCK0
TXD0
RXD0
SHREQ
BINARY
Transmission data (18byte)
(Insignificant data) (Response)
Low level
Low level
(Insignificant data)
Transmission data (No volume restriction)
High level
Low level
Figure 6-7.
Special data transmission system
(Example of transmission from main to sub)
Transmission data (No volume restriction)
(Insignificant data)
Low level
Normal data transmission system
(Example of transmission from sub to main)
(Insignificant data)
Transmission data (18byte)
High level
59
XG-V10WU
XG-V10WE
(Response)