Atmel AVR180 Application Note Download Page 11 | Manualshive

Page: 11 / 12

background image

AVR180

11

«
...
9
10
11
12
»

Summary of Contents for AVR180

Page 1: ...e instructions the supplied volt age must always stay above the mini mum voltage level set by the chosen operating frequency When supplied voltage drops below this level the CPU may start to execute s...

Page 2: ...s described in the introduction may initialize an unintended write to the non volatile memory This may cause random corruption of the memory contents Note 1 As the AVR CPU is not capable of writing to...

Page 3: ...ost design The voltage transition on the RESET pin is very steep Combined with the large hysteresis the accuracy is high On the other hand the response time is slow which makes it unsuitable for rapid...

Page 4: ...ly large current C1 and C2 Capacitors C1 and C2 short RF noise picked up in the cir cuitry and amplified by the transistors Both capacitors can be omitted but a value greater than 1nF is recommended F...

Page 5: ...tor R5 is usually chosen much smaller than the other resistors R1 R4 the last two expressions both sim plify to I VCC R1 R2 R3 R4 VCC 1 R1 R2 1 R3 R4 I VCC R1 R2 R3 R4 R5 R RESET I VCC R1 R2 R5 R RESE...

Page 6: ...transistor T1 is open keeping RESET at VCC When the supply voltage VCC drops below the threshold voltage VT the transistor T1 closes This allows resistor R3 to pull RESET low active The closing of th...

Page 7: ...ide the transistor T1 and pull the RESET pin low To ensure proper low voltage detector operation the series resistance in R3 R4 should not exceed the recommended 50 k Threshold Accuracy As the thresho...

Page 8: ...e reset is held active for a defined amount of time after the condition power on reset brown out reset etc that caused the reset has returned to normal see Figure 6 Some of these devices also provide...

Page 9: ...nput pin is higher than the reference voltage the output will be activated The threshold voltage is easily defined by a volt age divider R1 and R2 Notes 1 Offered by Maxim Integrated Product Inc 2 Off...

Page 10: ...AVR180 10...

Page 11: ...AVR180 11...

Page 12: ...port devices or systems Atmel Headquarters Atmel Operations Corporate Headquarters 2325 Orchard Parkway San Jose CA 95131 TEL 408 441 0311 FAX 408 487 2600 Europe Atmel U K Ltd Coliseum Business Centr...

Reviews:

No comments

Related manuals for AVR180

Brand: S-COM Pages: 400

Brand: 2M Technology Pages: 17

Brand: 2iB Pages: 5

EtherNetIP ControlPlex CPC12EN

Brand: E-T-A Pages: 28

Elemec3 013-02-0095-002

Brand: GAI-Tronics Pages: 12

Brand: Unipower Pages: 24

Brand: L-Acoustics Pages: 20

Brand: HW Group Pages: 18

SensoTimer ST6 Duo eco!ogic

Brand: Kärcher Pages: 96

Brand: Festo Pages: 109

Brand: Topworx Pages: 8

ADAP-KOOL AK-PC 781

Brand: Danfoss Pages: 142

Brand: OMEGA AIR Pages: 12

SatService sat-nms VLC

Brand: Calian Pages: 40

Brand: National Instruments Pages: 12

Brand: Teradek Pages: 10

Brand: Zmotion Pages: 59

Brand: Herth+Buss Pages: 31

Brands by name

0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Popular brands

Load more brands