Filter
Top Products
Rev.2.00 Nov 28, 2005 page 368 of 378
REJ09B0124-0200
M16C/6N Group (M16C/6NK, M16C/6NM) 23. Usage Precaution
Under development
This document is under development and its contents are subject to change.
23.16 Dedicated Input Pin
When dedicated input pin voltage is larger than VCC pin voltage, latch up occurs.
When different power supplied to the system, and input voltage of unused dedicated input pin is larger than
voltage of VCC pin, connect dedicated input pin to VCC via resistor (approximately 1kΩ).
Figure 23.8 shows the circuit connection.
This note is also applicable when VINPUT exceeds VCC during power-up.
The resistor is not necessary when VCC pin voltage is same or larger than dedicated input pin voltage.
Figure 23.8 Circuit Connection
VCC Dedicated
input pin
(e.g. NMI)
Different power supply
M16C/6NK, M16C/6NM