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3802 데이터시트(PDF) 91 Page - Renesas Technology Corp

부품명 3802
상세설명  8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 38000 SERIES
PDF  208 Pages
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제조업체  RENESAS [Renesas Technology Corp]
홈페이지  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

3802 데이터시트(HTML) 91 Page - Renesas Technology Corp

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3802 GROUP USER’S MANUAL
APPLICATION
2.3 Serial I/O
2.3.5 Serial I/O application examples
(1) Communication using a clock synchronous serial I/O (transmit/receive)
_____
Outline : 2-byte data is transmitted and received through the clock synchronous serial I/O. The SRDY
signal is used for communication control.
Figure 2.3.17 shows a connection diagram, and Figure 2.3.18 shows a timing chart.
Fig. 2.3.17 Connection diagram [Communication using a clock synchronous serial I/O]
Specifications : • The Serial I/O1 is used (clock synchronous serial I/O is selected)
• Synchronous clock frequency : 125 kHz (f(X IN) = 4 MHz is divided by 32)
_____
• The SRDY1 (receivable signal) is used.
_____
• The receiving side outputs the SRDY1 signal at intervals of 2 ms (generated by
timer), and 2-byte data is transferred from the transmitting side to the receiving
side.
Fig. 2.3.18 Timing chart [Communication using a clock synchronous serial I/O]
• • • •
D0
D4
D2
D1
D6
D5
D7
D3
D0
D4
D2
D1
D6
D5
D7
D3
D0
D1
• • • •
• • • •
TXD
SCLK1
SRDY1
2 ms
P41
/INT0
SCLK1
TXD
3802 group
SRDY1
SCLK
RXD
3802 group
Transmitting side
Receiving side



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