m3819 Renesas Electronics Corporation., m3819 Datasheet - Page 108

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

2. APPLICATION
Fig. 2.3.13 Connection diagram [Output of serial data]
Fig. 2.3.14 Timing chart [Output of serial data]
94
2.3.4 Serial I/O application examples
Figre 2.3.14 shows an output timing chart of serial data.
(1) Output of serial data (control of a peripheral IC)
Outline : The port is connected to the CS pin of a peripheral IC and the serial transmission is controlled.
Specifications : • The Serial I/O 1 is used (the automatic transfer function is not used)
CS
CLK
DATA
• Synchronous clock frequency: 131 kHz ( f(X
• Transmission direction: LSB first
• The Serial I/O 1 interrupt is not used.
• The Port P6
control (the output level of the port P6
3819 group
P6
P6
6
5
/S
/S
CLK11
OUT1
P6
7
7
is connected to the CS pin (“L” active) of the peripheral IC for a transmission
3819 Group USER’S MANUAL
DO
0
CS
CLK
DATA
DO
1
DO
7
2
is controlled by software).
DO
Peripheral IC
CS
CLK
DATA
IN
3
) = 4.19 MHz is divided by 32)
MITSUBISHI MICROCOMPUTER
2.3 Serial I/O
3819 Group