MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA

33888

5

34

RST

Reset (Active Low)

This input terminal is used to initialize the device configuration and fault registers,

as well as place the device in a low current standby mode. This terminal also starts

the watchdog timeout when transitioned from logic [0] to logic [1]. This terminal

internal passive pulldown.

35

FSI

Fail-Safe Input

The Fail-Safe input terminal level determines the state of the outputs after a

watchdog timeout occurs. This terminal has an internal pullup. If the FSI terminal is

left to float to a logic [1], then HS0 and HS2 will turn on when in the Fail-Safe state.

If the FSI terminal is tied to GND, the watchdog circuit and fail-safe operation will be

disabled, thus allowing operation without a watchdog signal.

36

WDIN

Watchdog Input

This input terminal is a CMOS logic level input that is used to monitor system

operation. If the incoming watchdog signal does not transition within the normal

watchdog timeout range, the device will operate in the Fail-Safe mode. This input

has an active internal pulldown.

TERMINAL DEFINITIONS FOR PQFN (continued)

Functional descriptions of many of these terminals can be found in the System/Application Information section beginning on

Terminal

Terminal

Name

Formal Name

Definition

Freescale Semiconductor, Inc.

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