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2. APPLICATION
MITSUBISHI MICROCOMPUTER
3819 Group
2.3 Serial I/O
3819 Group USER’S MANUAL
2.3.3 Setting of serial I/O mode
Whether SRDY signal output, CS signal receive and CLK signal output pin switch (SCLK12) functions can be selected
to use or not by the following conditions:
 Serial I/O circuits ( serial I/O 1 or serial I/O 2 )
 The automatic transfer function is ON or OFF ( at the serial I/O 1 only)
 Transfer clock ( internal clock or external clock)
Figure 2.3.12 shows a setting of serial I/O mode.
Fig. 2.3.12 Setting of Serial I/O mode
Serial I/O 1
Automatic transfer function
OFF
Automatic transfer function
ON
Internal clock
External clock
Internal clock
External clock
use SCLK12 pin
not use SCLK12 pin
Serial I/O 2
Serial I/O 3
Internal clock
External clock
output SRDY signal
not output SRDY signal
output SRDY signal
not output SRDY signal
use CS function
not use CS function