7540 datasheet(191/366 Pages) RENESAS

Part #	7540

Description	8-BIT CISC SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 740 SERIES

PDF	366 Pages

Scroll/Zoom	100%

Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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191 / 366 page

2-115

REJ09B0018-0200Z

Rev.2.00

Jun 21, 2004

7540 Group

APPLICATION

2.6 Serial I/O1

(3) Communication using UART of serial I/O (transmit/receive)

Outline : 2-byte data is transmitted and received, using UART. Port P00 is used for communication

control.

Specifications : •The Serial I/O1 (UART selected ) is used.

•Transfer bit rate : 9600 bps (f(XIN) = 4.9152 MHz divided by 512)

•Communication control using port P00 (output level of port P00 is controlled by

software)

2-byte data is transferred from the transmitter to the receiver at 10 ms intervals

which the timer generates.

Figure 2.6.18 shows a connection diagram, Figure 2.6.19 shows a timing chart, Figure 2.6.20 shows

the control procedure of transmitter, and Figure 2.6.21 shows an example of control procedure of

receiver.

Fig. 2.6.18 Connection diagram

Fig. 2.6.19 Timing chart

P00

TXD

10 ms

D1 D2 D3

D4 D5 D6

SP(2)

D1 D2 D3

D4 D5 D6

SP(2)

.....

Transmitter

P00

TxD

7540 Group

P00

RXD

7540 Group

Receiver

7540 Datasheet(PDF) 191 Page - Renesas Technology Corp