Datasheet > SMR101_10

SMR101_10

更新时间： 2022-05-07 01:20:55

品牌	Logo	应用领域
SUMMIT		电子控制器
页数	文件大小	规格书
9页	153K
描述
programmable reset controller especially designed for embedded consumer electronics.

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SMR101_10 数据手册

SMR101

Preliminary Information ¹(See Last Page)

FEATURES & APPLICATIONS

INTRODUCTION

• Two Programmable Reset Outputs, SOFT_RST#

And HARD_RST#

• De-Bounced Push-Button Reset Input With a

Programmable Delay Up To 40 Seconds Prior To

Reset Assertion

• 8 Programmable Settings For Both SOFT_RST#

And HARD_RST# Delay

• Programmable Voltage Monitor With 8 Voltage

Settings To Trigger SOFT_RST# Output

• Programmable Reset Output Duration From 1-

200ms

The SMR101 is a programmable reset controller

especially designed for embedded consumer

electronics. The device provides dual outputs that can

be used to implement “soft” and “hard” system resets.

Both resets can be triggered by an external reset input,

and an internal voltage monitor can trigger the soft

reset. Typically a “soft” reset applies to volatile registers

in an embedded controller while a hard reset is

equivalent to a full power cycle without the associated

power-up delays. The SMR101 receives an external

push-button input using an internal programmable de-

bounced timer. The push button input hold down time is

programmable up to 40 seconds with an internal on-chip

timer. A “short” hold down time (0.125-10 sec) asserts

the SOFT_RST# pin while a long hold down time (0.5-

40 sec) asserts the HARD_RST# pin. Both reset

outputs have programmable output durations from 1-

200ms. Additionally, voltage monitoring is provided via a

programmable threshold detector (2.30V – 4.50V) on

• Built-In 15us Voltage Glitch Filtering And Input

“De-Bouncing”

• 6 Ball Ultra CSP^TM(Chip-Scale) Package

• 8 Lead SOIC Package

Applications

• PDAs, Handheld PCs, Cameras, Camcorders

• Handheld GPS Equipment

the VDD pin.

This voltage detector asserts the

SOFT_RST# pin for the same 1-200ms output duration

as above. A 15us glitch filter avoids nuisance tripping

that can result in unnecessary system resets. The

SMR101 is factory programmed, to default values;

however, multiplexed programming pins are also

provided for in-system programming for prototype

purposes.

• Satellite And Cable-TV Set-Top Box

SIMPLIFIED APPLICATIONS DRAWING

2.7V 5.5V

0.1μf

3.3V

Manual

Reset

Switch

TRIM_C

FILT_CAP

RESET_IN#

SOFT_RST#

SMR101

HARD_RST#

μP

Figure 1 – Applications schematic using the SMR101 to supervise an embedded controller. As shown, the

SMR101 implements a two-level RESET function including external manual input.

http://www.summitmicro.com

2099 2.4 7/20/2010

12 3 4 5 6 7...9

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