參數(shù)資料
型號(hào)： Z86C72
廠商： ZiLOG, Inc.
英文描述： IR MICROCONTROLLER
中文描述： 紅外單片機(jī)
文件頁(yè)數(shù)： 60/71頁(yè)
文件大?。?/td> 364K
代理商： Z86C72
Z86C72/C92/L72/L92
IR Microcontroller
Zilog
6-60
P R E L I M I N A R Y
DS97LVO0900
FUNCTIONAL DESCRIPTION
(Continued)
Mask Selectable Options.
There are six Mask Selectable
Options to choose from based on ROM code require-
ments. (See Table 7).
Low Voltage Detection/Standby.
An on-chip Voltage
Comparator checks that the V
CC
is at the required level for
correct operation of the device. Reset is globally driven
when V
CC
falls below V
LV
(Vrf1). A small further drop in
V
CC
causes the XTAL1 and XTAL2 circuitry to stop the
crystal or resonator clock. Typical Low-Voltage power con-
sumption in this Low Voltage Standby mode (I
LV
) is about
45
μ
A (varying with the number of Mask selectable options
enabled). If the V
CC
is allowed to stay above V
RAM
, the
RAM content is preserved. When the power level is re-
turned to above V
LV
, the device will perform a POR and
function normally (Figure 45).
The minimum operating voltage varies with the tempera-
ture and operating frequency, while V
LV
varies with tem-
perature only.
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.
Table 7. Mask Selectable Options
Option
Function
Permanent Watch-Dog
Timer
RAM Protect
RC/Other
32 kHz XTAL
Port 04-07 Pull-ups
Port 00-03 Pull-ups
Port 31-33 Pull-ups
Port 20-27 Pull-ups
Port 3 Mouse Mode 0.4 V
DD
Trip
On/WDT command invoked
On/Off
RC/XTAL
On/Off
On/Off
On/Off
On/Off
On/Off
On/Off
Figure 44. Typical Z86L/CX2 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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