38K2 datasheet(209/358 Pages) RENESAS

Part #	38K2

Description	RENESAS 8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 38000 SERIES

PDF	358 Pages

Scroll/Zoom	100%

Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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209 / 358 page

2.4 Serial I/O

Rev.2.00

Oct 15, 2006

page 60 of 112

38K2 Group

REJ09B0338-0200

APPLICATION

(4)

Communication (transmit/receive) using asynchronous serial I/O (UART)

Outline : 2-byte data is transmitted and received, using the asynchronous serial I/O.

Port P24 is used for communication control.

Figure 2.4.29 shows a connection diagram, and Figure 2.4.30 shows a timing chart.

Fig. 2.4.29 Connection diagram (Communication using UART)

Specifications : • The Serial I/O is used (UART is selected).

• Transfer bit rate : 9600 bps (f(XIN) = 6 MHz is divided by 624)

• Communication control using port P24

(The output level of port P24 is controlled by software.)

• 2-byte data is transferred from the transmitting side to the receiving side at intervals

of 10 ms generated by the timer.

Fig. 2.4.30 Timing chart (using UART)

Transmitting side

P24

38K2 group

P24

38K2 group

Receiving side

TXDRXD

P24

10 ms

D0 D1 D2 D3

D4 D5 D6 D7

SP(2)

D1 D2 D3 D4 D5 D6

SP(2)

.....

TXD

.....

38K2 Datasheet(PDF) 209 Page - Renesas Technology Corp