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Z8F0113 датащи(PDF) 39 Page - Zilog, Inc.

номер детали Z8F0113
подробное описание детали  High-Performance 8-Bit Microcontrollers
PDF  245 Pages
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производитель  ZILOG [Zilog, Inc.]
домашняя страница  http://www.zilog.com
Logo ZILOG - Zilog, Inc.

Z8F0113 датащи(HTML) 39 Page - Zilog, Inc.

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PS024315-1011
P R E L I M I N A R Y
Reset Sources
Z8 Encore! XP® F0823 Series
Product Specification
24
Voltage Brown-Out Reset
The devices in the Z8 Encore! XP F0823 Series provide low VBO protection. The VBO
circuit senses when the supply voltage drops to an unsafe level (below the VBO threshold
voltage) and forces the device into the Reset state. While the supply voltage remains
below the POR voltage threshold (VPOR), the VBO block holds the device in the Reset.
After the supply voltage again exceeds the Power-On Reset voltage threshold, the device
progresses through a full System Reset sequence, as described in the Power-On Reset sec-
tion on page 23. Following POR, the POR status bit in the Reset Status (RSTSTAT) Regis-
ter is set to 1. Figure 6 displays Voltage Brown-Out operation. For the VBO and POR
threshold voltages (VVBO and VPOR), see the Electrical Characteristics chapter on
page 196.
The VBO circuit can be either enabled or disabled during STOP Mode. Operation during
STOP Mode is set by the VBO_AO Flash Option bit. For information about configuring
VBO_AO, see the Flash Option Bits chapter on page 146.
Figure 5. Power-On Reset Operation
VCC = 0.0V
VCC = 3.3 V
VPOR
VVBO
Internal Precision
Internal RESET
signal
Program
Execution
POR
counter delay
Oscillator
Note: Not to Scale



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