M38203M4 Datasheet, PDF (237/344 Pages) Mitsubishi Electric Semiconductor – 8-BIT SINGLE-CHIP MICROCOMPUTER

APPLICATION
2.6 Serial I/O2
(2) Serial I/O2 register (SIO2)
A transmit/receive operation is started by writing transfer data into the serial I/O2 register (address
001F16).
Figure 2.6.10 shows the structure of the serial I/O2 register.
Serial I/O2 register
b7 b6 b5 b4 b3 b2 b1 b0
Serial I/O2 register (SIO2) [Address 1F16]
B
Functions
At reset R W
0 _{At transmit}
?
to _{•Set “0016 to FF16” as transmit data.}
7 _{•The transmit data is transferred automatically}
to the serial I/O shift register 2 by writing
transmit data.
At receive
•When all receive data has been input into the
serial I/O shift register 2, the receive data is
automatically transferred to this register.
Fig. 2.6.10 Structure of serial I/O2 register
3820 GROUP USER’S MANUAL
2–151