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ZGP323H Datasheet(PDF) 72 Page - Zilog, Inc.

Part No. ZGP323H
Description  Programmable input glitch filter for pulse reception
Download  107 Pages
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Maker  ZILOG [Zilog, Inc.]
Homepage  http://www.zilog.com
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ZGP323H Datasheet(HTML) 72 Page - Zilog, Inc.

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ZGP323H
Product Specification
PS023803-0305
Functional Description
64
WDTMR During STOP (D3)
This bit determines whether or not the WDT is active during STOP Mode.
Because the XTAL clock is stopped during STOP Mode, the on-board RC has to
be selected as the clock source to the WDT/POR counter. A 1 indicates active
during Stop. The default is 1.
EPROM Selectable Options
There are seven EPROM Selectable Options to choose from based on ROM code
requirements. These options are listed in Table 24.
Voltage Brown-Out/Standby
An on-chip Voltage Comparator checks that the VDD is at the required level for
correct operation of the device. Reset is globally driven when VDD falls below VBO.
A small drop in VDD causes the XTAL1 and XTAL2 circuitry to stop the crystal or
resonator clock. If the VDD is allowed to stay above VRAM, the RAM content is pre-
served. When the power level is returned to above VBO, the device performs a
POR and functions normally.
Table 24. EPROM Selectable Options
Port 00–03 Pull-Ups
On/Off
Port 04–07 Pull-Ups
On/Off
Port 10–13 Pull-Ups
On/Off
Port 14–17 Pull-Ups
On/Off
Port 20–27 Pull-Ups
On/Off
EPROM Protection
On/Off
Watch-Dog Timer at Power-On Reset On/Off


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