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參數(shù)資料
| 型號： | Z86L80 |
| 廠商： | ZiLOG, Inc. |
| 英文描述： | Low-Voltage Microcontroller |
| 中文描述： | 低電壓微控制器 |
| 文件頁數(shù)： | 48/58頁 |
| 文件大?。?/td> | 301K |
| 代理商： | Z86L80 |
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Z86L79/80
Low-Voltage Microcontroller
Zilog
3-48
P R E L I M I N A R Y
DS97LVO0601
FUNCTIONAL DESCRIPTION
(Continued)
Low Voltage Protection.
An on-board Voltage Compara-
tor checks that V
CC
is at the required level to ensure cor-
rect operation of the device. Reset is globally driven if V
CC
is below V
LV
(Low Voltage). The minimum operating volt-
age varies with the temperature and operating frequency,
while V
LV
varies with temperature only.
Mask Selectable Options.
There are six Mask Selectable
Options to choose from based on ROM code require-
ments. These are:
*When WDT is selected as always on, the WDT will run in
HALT or STOP mode regardless of the settings in the
WDTMR Register Bits D2&D3.
The Low Voltage trip voltage (V
LV
) is less than 2.1V under
the following conditions:
Maximum (V
LV
) Conditions:
T
A
= 0
°
C, +55
°
C Internal clock frequency equal to or less
than 4.0 MHz
Note:
The internal clock frequency is one-half the external
clock frequency.
The device functions normally at or above 2.0V under all
conditions. Below 2.0V, the device is guaranteed to func-
tion normally until the Low Voltage Protection trip point V
LV
is reached, below which reset is globally driven and then
the device is put in a low current stand by mode with the
oscillator stopped. The device is guaranteed to function
normally at supply voltages above the V
LV
trip point for the
temperatures and operating frequencies in maximum V
LV
conditions. The actual V
LV
trip point is a function of tem-
perature and process parameters (Figure 39).
Clock Source
RC/Other
On/Off
On/Off
On/Off
On/Off
M/N
On/Off*
Port 0 Pull-ups (lower nibble)
Port 0 Pull-ups (upper nibble)
Port 2 Pull-ups
Port 3 Pull-ups
Mouse/Normal
WDT Always On
Figure 39. Typical Z86L7X Low Voltage vs.
Temperature at 8 MHz
0
15
25
35
45
55
1.8
1.6
1.4
1.2
1
1.8
0.6
0.4
0.2
0
V
VLV
Temperature
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