AM2432...ALV datasheet(140/280 Pages) TI

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7.10.3.2 Safety Signal Timing

Tables and figures provided in this section define switching characteristics for MCU_SAFETY_ERRORn.

Table 7-14. MCU_SAFETY_ERRORn Switching Characteristics

see Figure 7-13

NO.

PARAMETER

MIN

MAX UNIT

SFTY1 tc(MCU_SAFETY_ERRORn)

Cycle time minimum, MCU_SAFETY_ERRORn

(PWM mode enabled)

(P*H)+(P*L)(1) (3) (4)

SFTY2 tw(MCU_SAFETY_ERRORn)

Pulse width minimum, MCU_SAFETY_ERRORn

active (PWM mode disabled)(5)

P*R(1) (2)

SFTY3

td (ERROR_CONDITION-

MCU_SAFETY_ERRORnL)

Delay time, ERROR CONDITION to

MCU_SAFETY_ERRORn active(5)

50*P(1)

(1)

P = ESM functional clock

(2)

R = Error Pin Counter Pre-Load Register count value

(3)

H = Error Pin PWM High Pre-Load Register count value

(4)

L = Error Pin PWM Low Pre-Load Register count value

(5)

When PWM mode is enabled, MCU_SAFETY_ERRORn stops toggling after RST22 and will maintain its value (either high or low) until

the error is cleared. When PWM mode is disabled, MCU_SAFETY_ERRORn is active low.

Figure 7-13. MCU_SAFETY_ERRORn Timing Requirements and Switching Characteristics

AM2434, AM2432, AM2431

SPRSP65D – APRIL 2021 – REVISED AUGUST 2022

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