M38B53M4-059FP datasheet(141/355 Pages) MITSUBISHI

141 / 355 page

38B5 Group User’s Manual

APPLICATION

2-53

2.3 Serial I/O

(2)

Transmission/Reception using automatic transfer

Outline: Serial transmission/reception control is performed, using the serial automatic transfer function.

Figure 2.3.25 shows a connection diagram, and Figure 2.3.26 shows a timing chart of serial data

transmission/reception.

P52/SCLK11

P51/SOUT1

P50/SIN1

38B5 group

Sub microcomputer

CLK

OUT

Fig. 2.3.25 Connection diagram

Specifications: • Use of serial I/O1 using automatic transfer function

• Synchronous clock frequency: 131 kHz (f(XIN) = 4.19 MHz is divided by 32.)

• Transfer direction: LSB first

• Transmission/reception byte number: 8 bytes/block each

• Transfer interval for 1-byte: 244

µs (32 cycles of transfer clock)

• Not use of serial I/O1 automatic transfer interrupt

Figure 2.3.27 shows the relevant registers setting, and Figure 2.3.28 shows the control procedure.

CLK

1 block

OUT

DO0

DO1

DO2

DO7

DO1

DO0

DI0

DI1

DI2

DI7

DI1

DI0

Block period is controlled by software.

(Synchronize it with the main routine.)

Fig. 2.3.26 Timing chart of serial data transmission/reception

M38B53M4-059FP Datasheet(PDF) 141 Page - Mitsubishi Electric Semiconductor

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