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| 型號(hào)： | 20746 |
| 英文描述： | Internal CGA Controller for a Specific LCD Panel ?lanSC300/?lanSC310 Solution for Systems Using a Back-Up Battery |
| 中文描述： | 內(nèi)部海巡署控制器為特定的液晶面板？lanSC300 /？lanSC310的系統(tǒng)解決方案使用一個(gè)備用電池 |
| 文件頁(yè)數(shù)： | 6/9頁(yè) |
| 文件大小： | 137K |
| 代理商： | 20746 |
élanSC300 and élanSC310 Microcontrollers Solution For Systems Using A Back-Up Battery
3
Figure 1.
Clean-Transition Switching Circuit
Trademarks
Copyright 1997 Advanced Micro Devices, Inc. All rights reserved.
AMD, the AMD logo and combinations thereof, and élan are trademarks of Advanced Micro Devices, Inc.
Product names used in this publication are for identification purposes only and may be trademarks of their respective companies.
D3
D4
390K
V
CC
Core
élan
203
AVCC
23, 81, 135, 180
141
RESIN
D1
D2
R4
C4
2.2
μ
F
3.3 V
from
Main
Power
V
CC
RLS4148
Optional
Push-
Button
Switch, SW1
Schottky Diode
Schottky Diode
Source
VBATT
Drain
U2A
5
Gate
74HCT74
C2
100pF
Q1
SI943ODY
Schottky Diode
Schottky Diode
VBATT
CLK
C3
R3
3.3 V
from
Main
Power
VBATT
V
CC
AC_GOOD
74HCT08
U1A
C1
100pF
R
1K
VBATT
5
7
3
Q
6
1
6
2
8
Q
D
4
14
P
R
C
L
14
3
1
2
R1
1K
Notes:
VBATT:Back-up battery source
V
:Main power source
U1, Pin 14:VBATT
U2, Pin 14:VBATT
RESIN:Derived from main power source
This drawing does not include the necessary capacitors and inductors required to assure adequate noise filtering on the V
CC
and AVCC inputs.
The AC_GOOD signal can optionally be used to drive the IORESET
input to élan.
Micro Power Off mode requires that RESIN be maintained High and IORESET be asserted Low. For more information, see the élan
SC300 Microcontroller
Data Sheet, and the élan
SC310 Microcontroller Data Sheet. The RESIN
input to the élanSC300 and élanSC310 microcontrollers should be generated by
an RC circuit that is derived from the battery-backed-up VCC Core power plane, which will remain deasserted (High) when the main power source is removed.
It is likely that you will want a reset switch also tied to the RESIN circuit.
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