m3819 Renesas Electronics Corporation., m3819 Datasheet - Page 107

• Manufacturer Part Number: m3819
• Description: Mitsubishi 8-bit Single-chip Microcomputer 740 Family / 38000 Series
• Manufacturer: Renesas Electronics Corporation.

2. APPLICATION
Fig. 2.3.12 Setting of Serial I/O mode
2.3.3 Setting of serial I/O mode
Whether S
to use or not by the following conditions:
Figure 2.3.12 shows a setting of serial I/O mode.
• 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)
Serial I/O 2
Serial I/O 3
RDY
Serial I/O 1
signal output, CS signal receive and CLK signal output pin switch (S
Automatic transfer function
ON
Internal clock
External clock
Automatic transfer function
OFF
3819 Group USER’S MANUAL
not output S
output S
RDY
Internal clock
External clock
Internal clock
External clock
signal
RDY
signal
output S
not output S
use CS function
not use CS function
use S
not use S
CLK12
MITSUBISHI MICROCOMPUTER
CLK12
RDY
CLK12
pin
signal
RDY
) functions can be selected
pin
2.3 Serial I/O
signal
3819 Group
93