HD64336900G Datasheet, PDF (304/408 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Tiny Series

If the power supply voltage falls below the Vreset1 (Typ. = 2.3 V) voltage, this LSI enters low-
voltage detection reset operation. When the voltages input on the ExtU and ExtD pins are used as
the compared voltage, ensure to use the LVDR (reset detection voltage: Typ. = 2.3 V) circuit.
External power
supply voltage
ExtD input voltage ₍₁₎
ExtU input voltage
(2)
(3)
Vexd
(4)
Vreset1
VSS
LVDDE
LVDDF
LVDUE
LVDUF
IRQ0 interrupt IRQ0 interrupt
generated
generated
Figure 17.6 Operational Timing of LVDI Circuit (When Compared Voltage is Input
through ExtU and ExtD Pins))
Rev. 1.00, 11/03, page 276 of 376