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38C3 Datasheet(PDF) 110 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) 110 Page - Renesas Technology Corp

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38C3 Group User’s Manual
APPLICATION
2-45
2.3 Serial I/O
Figure 2.3.19 shows a control procedure.
Fig. 2.3.19 Control procedure
SIOCON1 (address 001916)
SIOCON2 (address 001A16)
ICON1 (address 003E16), bit 3
P5 (address 000A16), bit 7
P5D (address 000B16), bit 7
010010102
XXXXXXX02
0
1
1
P5 (address 000A16), bit 7
0
IREQ1 (address 003C16), bit 3 ?
1
0
RESET
SIO (address 001B16)
IREQ1 (address 003C16), bit 3
0
Y
P5 (address 000A16), bit 7
1
N
Initialization
Transmission data
All data has been transmitted ?
q X: This bit is not used here. Set it to “0” or “1” arbitrarily.
Judgment of completion of transmitting 1-byte
data
Use any of RAM area as a counter for counting
the number of transmitted bytes.
Judgment of completion of transmitting the target
number of bytes
Returning CS signal output level to “H” when
transmission of the target number of bytes is
completed
Serial I/O setting
Serial I/O interrupt: Disabled
CS signal output level to “H” setting
CS signal output port setting
CS signal output level to “L” setting
Transmission data write
(Start of 1-byte data transmission)
Serial I/O interrupt request bit to “0” setting



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