Z8FMC16100 datasheet(45/402 Pages) ZILOG

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PS024604-1005

P R E L I M I N A R Y

Reset Types

Z8FMC16100 Series Flash MCU

Product Specification

Reset and Stop-Mode Recovery

The Reset Controller within the Z8FMC16100 Series Flash MCU controls RESET and

Stop-Mode Recovery operation. In typical operation, the following events cause a RESET

to occur:

• Power-On Reset (POR)

• Voltage Brown-Out (VBO)

• Watch-Dog Timer time-out (when configured via the WDT_RES Option Bit to initiate a

Reset)

• External RESET pin assertion

• On-Chip Debugger initiated RESET (OCDCTL[0] set to 1)

• Fault detect logic

When the Z8FMC16100 Series Flash MCU is in STOP mode, a Stop-Mode Recovery is

initiated by either of the following:

• Watch-Dog Timer time-out

• GPIO port input pin transition on an enabled Stop-Mode Recovery source

Reset Types

The Z8FMC16100 Series Flash MCU provides two different types of reset operation (Sys-

tem Reset and Stop-Mode Recovery). The type of reset is a function of both the current

operating mode of the Z8FMC16100 Series Flash MCU and the source of the reset. Table

6 lists the types of reset and their operating characteristics.

Table 6. Reset and Stop-Mode Recovery Characteristics and Latency

Reset Type

Reset Characteristics and Latency

Peripheral Control

Registers

eZ8 CPU Reset Latency (Delay)

System Reset

Reset (as

applicable)

RESET

A minimum of 66 Internal Precision Oscillator cycles.

Stop-Mode

Recovery

Unaffected, except

RSTSRC and

OSCCTL registers

Reset

A minimum of 66 Internal Precision Oscillator cycles.

Z8FMC16100 Datasheet(PDF) 45 Page - Zilog, Inc.

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