m3819 Renesas Electronics Corporation., m3819 Datasheet - Page 111

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

2. APPLICATION
Fig. 2.3.18 Connection diagram [Data transmission or reception using automatic transfer]
Fig. 2.3.19 Timing chart [Data transmission or reception using automatic transfer]
(2) Data transmission or reception using automatic transfer
Figure 2.3.19 shows a transmission or reception timing chart using an automatic transfer.
Outline : Serial transmission or reception is controlled by using a serial automatic transfer function.
Specifications : • The Serial I/O 1 is used (the automatic transfer function is used).
CLK
OUT
IN
• Transmission clock frequency: 131 kHz (f(X
• Transmission direction : LSB first
• Number of bytes for transmission or reception : each 8 bytes/block
• Transmission interval: 244 s (corresponding to a transmission clock of 32 bits)
• The Serial I/O automatic transfer interrupt is not used.
DO
DI
0
3819 group
0
P6
P6
A cycle of blocks is controlled by software.
P6
6
5
/S
/S
4
DO
(synchronize with a main routine.)
CLK11
DI
/S
OUT1
1
IN1
1
1 block
DO
DI
2
3819 Group USER’S MANUAL
2
CLK
OUT
IN
DO
DI
7
7
Sub-microcomputer
CLK
IN
OUT
IN
) = 4.19 MHz is divided by 32)
DO
DI
0
0
DO
DI
MITSUBISHI MICROCOMPUTER
1
1
2.3 Serial I/O
3819 Group
97