4507 Datasheet, PDF (36/115 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

4507 Group
RESET FUNCTION
System reset is performed by applying “L” level to RESET pin for
1 machine cycle or more when the following condition is satisfied;
the value of supply voltage is the minimum value or more of the
recommended operating conditions.
Then when “H” level is applied to RESET pin, software starts from
address 0 in page 0.
f(XIN)
RESET
On-chip oscillator (internal oscillator)
is counted 5359 times.
Program starts
(address 0 in page 0)
Fig. 33 Reset release timing
Reset input
1 machine cycle or more
On-chip oscillator (internal oscillator)
is counted 5359 times.
0.85VDD
RESET
0.3VDD
Program starts
(address 0 in page 0)
(Note)
Note: Keep the value of supply voltage to the minimum value
or more of the recommended operating conditions.
Fig. 34 RESET pin input waveform and reset operation
Rev.3.01 2005.02.04 page 36 of 111
REJ03B0107-0301