RA4M1 datasheet(66/130 Pages) RENESAS

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R01DS0355EJ0100 Rev.1.00

Page 66 of 130

Oct 8, 2019

RA4M1 Group

2. Electrical Characteristics

2.3.5

NMI and IRQ Noise Filter

Note:

200 ns minimum in Software Standby mode.

Note:

If the clock source is switched, add 4 clock cycles of the switched source.

Note 1.

tPcyc indicates the cycle of PCLKB.

Note 2.

tNMICK indicates the cycle of the NMI digital filter sampling clock.

Note 3.

tIRQCK indicates the cycle of the IRQi digital filter sampling clock (i = 0 to 12, 14, 15).

Figure 2.36

NMI interrupt input timing

Figure 2.37

IRQ interrupt input timing

Table 2.30

NMI and IRQ noise filter

Parameter

Symbol

Min

Typ

Max

Unit

Test conditions

NMI pulse width

tNMIW

200

NMI digital filter disabled

tPcyc × 2 ≤ 200 ns

tPcyc × 2*1

tPcyc × 2 > 200 ns

200

NMI digital filter enabled

tNMICK × 3 ≤ 200 ns

tNMICK × 3.5*2

tNMICK × 3 > 200 ns

IRQ pulse width

tIRQW

200

IRQ digital filter disabled

tPcyc × 2 ≤ 200 ns

tPcyc × 2*1

tPcyc × 2 > 200 ns

200

IRQ digital filter enabled

tIRQCK × 3 ≤ 200 ns

tIRQCK × 3.5*3

tIRQCK × 3 > 200 ns

tNMIW

NMI

tIRQW

IRQ

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