M37702E6BFS Renesas Electronics America, M37702E6BFS Datasheet - Page 489

• Manufacturer Part Number: M37702E6BFS
• Description: EPROM MCU/8BIT CMOS EMULATION CH
• Manufacturer: Renesas Electronics America

Specifications of M37702E6BFS

• Accessory Type: Emulator EPROM MCU
• For Use With/related Products: 7702
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Fig. 20 Processing of ports
5. Processing of ports
Take protective measures for ports in both hardware and software.
<Hardware protection>
<Software protection>
not.
Pi register.
Insert a resistor of 100 ohms or more in series.
For ports in the input mode, try reading in several times to detect whether their levels are matched or
For ports in the output mode, since the output data can reverse owing to noise, periodically set the port
Set the port Pi direction register again at stated periods.
Data bus
Direction register
7702/7703 Group User’s Manual
Port latch
Appendix 5. Countermeasures against noise
Port
Noise
APPENDIX
21–43