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38C3 Datasheet(PDF) 106 Page - Renesas Technology Corp

Part # 38C3
Description  8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 38000 SERIES
PDF  224 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

38C3 Datasheet(HTML) 106 Page - Renesas Technology Corp

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38C3 Group User’s Manual
APPLICATION
2-41
2.3 Serial I/O
Fig. 2.3.12 Registers setting relevant to reception side
Figure 2.3.13 shows a control procedure of the transmission side, and Figure 2.3.14 shows a control
procedure of the reception side.
Fig. 2.3.13 Control procedure of transmission side
SIOCON1
0
LSB first
SRDY output used
Serial I/O control register 1 (address 001916)
01
External clock
Reception side
Initialization
SIOCON1 (address 001916)
SIOCON2 (address 001A16)
INTEDGE (address 003A16), bit 0
010010102
XXXXXXX02
0
IREQ1 (address 003C16), bit 0, bit 3
0
IREQ1 (address 003C16), bit 3 ?
0
1
RESET
SIO (address 001B16)
IREQ1 (address 003C16), bit 3
0
q X: This bit is not used here. Set it to “0” or “1” arbitrarily.
Connection of completion of transmitting
(Serial I/O interrupt request flag)
Serial I/O setting
Transmission data write
Transmission of the
first byte data
IREQ1 (address 003C16), bit 0 ?
0
1
SIO (address 001B16)
Transmission of the
second byte data
IREQ1 (address 003C16), bit 3 ?
0
1
Transmission data write
Judgment of completion of transmitting
(Serial I/O interrupt request flag)
INT0 falling edge detection



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