Z8F0830 datasheet(39/257 Pages) ZILOG

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PS025113-1212

Reset and Stop Mode Recovery

Z8 Encore!® F0830 Series

Product Specification

Reset and Stop Mode Recovery

The reset controller in the Z8 Encore! F0830 Series controls RESET and Stop Mode

Recovery operations. In a typical operation, the following events can cause a reset:

•

Power-On Reset (POR)

•

Voltage Brown-Out (VBO)

•

Watchdog Timer time-out (when configured by the WDT_RES Flash option bit to

initiate a reset)

•

External RESET pin assertion (when the alternate RESET function is enabled by the

GPIO register)

•

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



When the device is in STOP Mode, a Stop Mode Recovery event is initiated by either of

the following occurrences:

•

A Watchdog Timer time-out

•

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



The VBO circuitry on the device generates a VBO reset when the supply voltage drops

below a minimum safe level.

Reset Types

The Z8 Encore! F0830 Series provides different types of Reset operations. Stop Mode

Recovery is considered a form of reset. Table 9 lists the types of resets and their operating

characteristics. The duration of a system reset is longer if the external crystal oscillator is

enabled by the Flash option bits; the result is additional time for oscillator startup.

Z8F0830 Datasheet(PDF) 39 Page - Zilog, Inc.