M37702E6BFS Renesas Electronics America, M37702E6BFS Datasheet - Page 490

• 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

APPENDIX
Appendix 5. Countermeasures against noise
21–44
6. Reinforcement of the power supply line
Reasons: The level of many wiring among 24 pieces of external address bus will change at the same time
of middle layer is Vcc side.
line centering the microcomputer. The vacant space must be filled with the Vss line. The other side must
be located with the Vcc line just as in the above-mentioned Vss line.
Connect the power supply line of external devices connected to the microcomputer with the bus and the
power supply line of the microcomputer in the shortest possible distance.
When using the multilayer boards, make sure that one of the middle layer is Vss side, and the other one
Use the broader wiring width than that of the other signal wire for the Vss and Vcc lines.
When using the double-sided boards, one side must be located with looped or mesh form to the Vss
when connecting external devices. That may causes noise of the power supply line.
7702/7703 Group User’s Manual