ZLP32300 datasheet(62/99 Pages) ZILOG

62 / 99 page

Crimzon® ZLP32300

Product Specification

PS020823-0208

Functional Description

Voltage Brownout/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 preserved. When the power

level is returned to above VBO, the device performs a POR and functions normally.

Low-Voltage Detection

Low-Voltage Detection Register—LVD(D)0Ch

Voltage detection does not work at STOP mode.

Do not modify register P01M while checking a low-voltage condition. Switching noise of

both Ports 0 and 1 together might trigger the LVD Flag.

Table 16. 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

Watchdog Timer at Power-On Reset ON/OFF

Field

Bit Position

Description

LVD

76543---

Reserved

No Effect

-----2--

HVD Flag set

HVD Flag reset

------1-

LVD Flag set

LVD Flag reset

-------0

R/W 1

Enable VD

Disable VD

*Default after POR

Note:

ZLP32300 Datasheet(PDF) 62 Page - Zilog, Inc.

ZLP32300 Datasheet(HTML) 62 Page - Zilog, Inc.

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