HD6412350 Hitachi, HD6412350 Datasheet - Page 982

• Manufacturer Part Number: HD6412350
• Description: (HD6412350 / HD6432351) 16-BIT MICROCONTROLLER
• Manufacturer: Hitachi

Note that pin states at power-on depend on the state of the STBY pin and NMI pin. The case in
which pins settle* from an indeterminate state at power-on, and the case in which pins settle* from
the high-impedance state, are described below.
After reset release, power-on reset exception handling is started.
Note: * “Settle” refers to the pin states in a power-on reset in each MCU operating mode.
E.1
When the NMI pin level changes from low to high after powering on, the chip goes to the power-
on reset state after a high level is detected at the NMI pin. While the chip detects a low level at the
NMI pin, the manual reset state is established. The pin states are indeterminate during this interval.
(Ports may output an internally determined value after powering on.)
The NMI setup time (t
962
When Pins Settle from an Indeterminate State at Power-On
Figure E-1 When Pins Settle from an Indeterminate State at Power-On
V
STBY
NMI
RES
CC
Appendix E Pin States at Power-On
Manual reset
NMIS
NMI = Low
) is necessary for the chip to detect a high level at the NMI pin.
NMI = High
RES = Low
Power-on reset
t
OSC1