TA600032-EN0/0
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5.2
'4-wire serial' access
The access method from "Local CPU" to "G9006" is "4-wire serial".
5.2.1
Control method
"4-wire serial" access starts at the falling edge of the "SS" signal.
The "SCK" signal before the "SS" signal falls is "H level".
The "MOSI" and "MISO" signals are output at the falling edge of the "SCK" signal.
The "MOSI" and "MISO" signals are input at the rising edge of the "SCK" signal.
"4-wire serial" access ends at the rising edge of the "SS" signal.
More than one "Control commands" cannot be output in one access (between the falling edge and the rising edge of the "SS"
signal).
The bit order to send is MSBit First (upper bits are transmitted first).
The byte order to store is LSByte First (little-endian).
G9006
G9001A
Local
CPU
Center
CPU
4-wire serial
7:0
15:8
23:16
31:24
7:0
15:8
23:16
31:24
Address
Transmission order
0
1
2
3
0
1
2
3
