µPD75P308

9

TYPE M-C

data

output

disable

P.U.R.

enable

P.U.R.

IN/OUT

P–ch

N-ch

P.U.R. : Pull–Up Resistor

1.4

NOTES ON USING P00/INT4 AND RESET PINS

In addition to the functions shown in sections 1.1 and 1.2, the P00/INT4 and RESET pins also have a function

to set a test mode (for IC testing) in which the internal operations of the

µPD75P308 are tested.

during ordinary operation, the

For example, if the wiring length of the P00/INT4 or RESET pin is too long, noise superimposed on the wiring

line of the pin may cause the above problem.

Therefore, keep the wiring length of these pins as short as possible to suppress the noise; otherwise, take noise

preventive measures as shown below by using external components.

•

and P00/INT4, RESET pin

•

and P00/INT4, RESET pin

P00/INT4, RESET

Diode with

P00/INT4, RESET