UPD70741 datasheet(104/112 Pages) NEC

104 / 112 page

µPD70741

104

(12) INTPn input setup time, hold time

Parameter

Symbol

Conditions

MIN.

MAX.

Unit

INTPn input low setup time

144

tSILK

9ns

INTPn input high setup time

145

tSIHK

9ns

INTPn input low pulse width

146

tCYIL

tCYK

INTPn input high-level width

147

tCYIH

2tCYK

(13) NMI input

The NMI pin incorporates a noise eliminator which is based on an analog delay (60 to 300 ns). The input setup

time and input hold time are not, therefore, specified for NMI.

The NMI pin accepts a level input, such that the input level must be held until the acceptance of the input is

confirmed after a branch to the handler.

CLKOUT (output)

INTPn (input)

(edge mode)

INTPn (input)

(level mode)

145

147

146

144

NMI (input)

Internal NMI

signal

CPU processing

Analog delay

Normal processing

Nonmaskable interrupt handling

After confirming acceptance,

de-activate NMI from the interrupt

handler.

UPD70741 Datasheet(PDF) 104 Page - NEC

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