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參數資料
| 型號： | SMR100S |
| 廠商： | Summit Microelectronics, Inc. |
| 英文描述： | Programmable Long-Delay Push-Button Reset Controller for Consumer Equipment |
| 中文描述： | 可編程長延遲按鈕復位控制器的消費電子設備 |
| 文件頁數： | 1/9頁 |
| 文件大小： | 603K |
| 代理商： | SMR100S |
SMR100
T H I S P R O D U C T H A S R E A C H E D E N D O F L I F E
Programmable Long-Delay Push-Button Reset Controller for Consumer Equipment
SUMMIT
Microelectronics, Inc.
2004 1717 Fox Drive San Jose CA 95131 Phone 408 436-9890 FAX 408 436-9897
The Summit Web Site can be accessed by “right” or “left” mouse clicking on the link:
http://www.summitmicro.com/
2076 1.6 06/30/04
1
FEATURES & APPLICATIONS
De-Bounced Reset Input with up to 40 Second
Programmable Delay Time
External Push-Button Control Provides a
Reliable End-User System Reset Function
Reset Signal at 3.0V with a Programmable
Timeout Period
Brownout Warning Signal whenever the supply
dips below 3.1V
Programmable Glitch Filtering of Brownout
Warning (BAD_PWR#) and Reset Function
8 Pin SOIC Package
6 ball
Ultra
CSP
TM
(Chip-Scale) Package
Applications
Satellite and Cable-TV Set-top box
Handheld PCs, Cameras, Camcorders, PDAs
Security/Medical Alert Systems
INTRODUCTION
The SMR100 programmable reset controller is
designed for consumer applications specified by
Satellite-TV set-top box standards. The SMR100
provides a satellite box controller solution during initial
setup, changing programming cards and/or system
reset needs without removing power. The part can
accommodate a long-delay hold down of an external
reset push-button using an internal programmable de-
bounced timer. The part is factory programmed,
however, multiplexed programming pins are also
provided for in-system programming for prototype
purposes.
The required hold down time is programmable from
0.325 to 40 Sec with an internal on-chip oscillator.
Accurate warning of a 3.1V brownout condition
(BAD_PWR#),
and
a
(RESET_OUT#) timeout period when the VDD supply
pin reaches 3.0V are also provided. During a reset
(RESET_OUT#), the part enables the “BAD_PWR#” or
brownout warning output until the reset has cleared. A
programmable glitch filter avoids nuisance tripping of
the internal comparators.
programmable
reset
SIMPLIFIED APPLICATIONS DRAWING
FILT_CAP
BAD_PWR#
TRIM_C
AP
SMR100
3.3V
3.3V
G
V
P
RESET_IN#
RESET_OUT#
0.1
μ
f
ASIC
μ
P
Manual
Reset
Switch
Figure 1 – Applications Schematic using the SMR100 to supervise the supply to digital components. As
shown, the SMR100 is designed to use a minimum of external components.
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