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3886 Datasheet(PDF) 253 Page - Renesas Technology Corp

Part # 3886
Description  8-BIT SINGLE-CHIP MICROCOMPUTER
PDF  380 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

3886 Datasheet(HTML) 253 Page - Renesas Technology Corp

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3886 Group User’s Manual
APPLICATION
2.9 Bus interface
Figure 2.9.11 shows the control procedure using the interrupt.
Fig. 2.9.11 Control procedure using interrupt
DBBCON (address 2A16)
XXXX10012
Read out DBB0 (address 2816) as command
DBBSTS0 (address 2916), bit3 ?
1
0
INTSEL (address 3916)
XXXXXX112
Read out DBBSTS0 (address 2916)
Write data to DBB0(address 2816)
• Data bus buffer enabled
• Single data bus buffer mode selected
• OBF00 validated (P42 output)
• Input buffer full interrupt source selected
• Output buffer empty interrupt source selected
< Input >
< Output >
Read out DBB0 (address 2816) as data
q x: This bit is not used here. Set it to “0” or “1” arbitrarily.



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