Electronic Components Datasheet Search |
|
ELM311 Datasheet(PDF) 2 Page - ELM Electronics |
|
ELM311 Datasheet(HTML) 2 Page - ELM Electronics |
2 / 5 page ELM311 Elm Electronics – Circuits for the Hobbyist < http://www.elmelectronics.com/ > Pin Descriptions Ordering Information These integrated circuits are available in either the 300 mil plastic DIP format, or in the 200 mil SOIC surface mount type of package. To order, add the appropriate suffix to the part number: 300 mil Plastic DIP............................... ELM311P 200 mil SOIC..................................... ELM311SM 2 of 5 All rights reserved. Copyright ©1999 Elm Electronics. Every effort is made to verify the accuracy of information provided in this document, but no representation or warranty can be given and no liability assumed by Elm Electronics with respect to the accuracy and/or use of any products or information described in this document. Elm Electronics will not be responsible for any patent infringements arising from the use of these products or information, and does not authorize or warrant the use of any Elm Electronics product in life support devices and/or systems. Elm Electronics reserves the right to make changes to the device(s) described in this document in order to improve reliability, function, or design. VDD (pin 1) This pin is the positive supply pin, and should always be the most positive point in the circuit. Internal circuitry connected to this pin is used to provide power on reset of the microprocessor, so an external reset signal is not required. Refer to the Electrical Characteristics section for further information. A (pin 2) This is the active high output drive signal for the (first) phase A winding. Normally, this output would be the first to be energized when starting a stepping sequence, and is always the first state entered into internally on powerup. After powerup, however, the ELM311 treats this pin specially, maintaining it at a low level until the first step command is received. This in effect keeps the motor off until selected by control circuitry. Dir (pin 3) This pin determines the sequence that the outputs will be energized in. A high input on the Dir pin while the step input is pulsed will cause a single clockwise step, while a low level will cause a counter-clockwise step. (See Figure 1 on page 4) Dir must be at a stable level prior to the low to high transition of Step in order to be recognized (refer to the Tsu specification). Step (pin 4) This input is used to control the motion of the motor. Outputs will change to their next state on the high to low transition of this input. Step is normally maintained at a low level, and is only brought high then low to cause a step to occur. The Step input is ignored for about 20ms after power-up to allow sufficient time for external circuits to stabilize. D (pin 5) This is the active high output drive signal for the (fourth) phase D winding. C (pin 6) This is the active high output drive signal for the (third) phase C winding. B (pin 7) This is the active high output drive signal for the (second) phase B winding. VSS (pin 8) Circuit common is connected to this pin. This is the most negative point in the circuit. ELM311DSB |
Similar Part No. - ELM311 |
|
Similar Description - ELM311 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |