Newland NLS-EM1395 Integration Manual Download Page 23

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Good Read LED

The EM1395 provides a pin (LED, PIN 10) on the host interface connector that can be used by an external

driver circuit to drive an LED to indicate a Good Read status. When a good read occurs, the LED pin gets

pulled low for about 300ms, and then the signal is back to a high level. This Good Read LED output is not

strong enough to drive an LED, so an LED driver circuit is needed.

The following Good Read LED driver circuit is provided for reference.

Summary of Contents for NLS-EM1395

Page 1: ...NLS EM1395 Embedded 1D Barcode Scan Engine Integration Guide...

Page 2: ...lity function or design at any time without notice Besides the information contained herein is subject to change without prior notice The products depicted in this manual may include software copyrigh...

Page 3: ...on History Version Description Date V1 0 0 Initial release December 26 2013 V1 1 0 Updates 1 Added the data of shallow sleep current 2 Updated the Communication Protocol section in Chapter 4 November...

Page 4: ...iderations 2 Installation Orientation 2 Optics 3 Window Placement 3 Window Material and Color 3 Scratch Resistance and Coating 3 Window Size 3 Ambient Light 4 Eye Safety 4 Mounting 4 Front View unit m...

Page 5: ...rface Connector 8 Dimensions of the Host Interface Connector unit mm 10 Flat Flexible Cable unit mm 11 Communication Interface 11 Communication Protocol 11 Trigger 13 Beeper 14 Good Read LED 15 Chapte...

Page 6: ......

Page 7: ...sy integration Supports all mainstream 1D barcodes Delivers fast and accurate scanning performance Simple parameter configuration and firmware update Illumination The EM1395 has a red LED wavelength 6...

Page 8: ...rformance Ambient Environment The following environmental requirements should be met to ensure good performance of the EM1395 Working Temperature 20 60 Storage Temperature 40 85 Humidity 5 95 non cond...

Page 9: ...3 Installation Orientation The following figure illustrates a front view of the EM1395 after proper installation...

Page 10: ...e front of the engine housing to the furthest surface of the window should not exceed 3mm and the distance from the front of the engine housing to the nearest surface of the window should not exceed 2...

Page 11: ...ell able to handle the flicker in fluorescent lights using 50 60Hz AC power However high frequency pulsed light can result in performance degradation Eye Safety The EM1395 has one LED that creates the...

Page 12: ...low show the mechanical mounting dimensions for the EM1395 The structural design should leave some space between components and reserve enough room for the flat flexible cable Front View unit mm Top V...

Page 13: ...terval between power ons may lead to unstable performance of the engine Do not resupply the power immediately after cutting it off The minimum interval must exceed 500ms The EM1395 itself does not pro...

Page 14: ...rain 3 0 3 3 3 6 V VIH High Level Input Voltage 0 41 VDD 2 1 3 VDD 0 3 V VIL Low Level Input Voltage 0 3 0 28 VDD 2 0 8 V VOH High Level Output Voltage 2 4 V VOL Low Level Output Voltage 0 4 V Operati...

Page 15: ...9 Chapter 4 Interfaces Host Interface Connector The following table lists the pin functions of the 12 pin host interface connector on the EM1395...

Page 16: ...vel 232 request to send signal 8 PWREN When low the engine is in the awake state when high the engine is in the sleep state 9 BUZ O Beeper output For the information of beeper driver circuit see the B...

Page 17: ...e Host Interface Connector unit mm The engine uses a 12 pin ZIF socket bottom contact model 10051922 1210ELF 10051922 1210EHLF manufactured by FCI The socket can be connected to a host device with a f...

Page 18: ...nnection and stable performance Communication Interface The EM1395 supports a TTL level 232 interface that in most cases does not require any hardware modifications to existing platforms However for t...

Page 19: ...ep 3 When the host detects the RTS is low it asserts the CTS to remove request then check the state of the RTS Step 4 When the engine detects the CTS is high it asserts the RTS to remove permission St...

Page 20: ...e one illustrated above Execute steps 5 6 only Advantage Steps 1 4 are skipped Disadvantage If the engine is in shallow sleep this transaction can still function but it becomes impossible if the engin...

Page 21: ...ed after sending the data to the Host If the trigger is released during a scan attempt the EM1395 immediately stops decoding Next decode session does not happen until the EM1395 receives active trigge...

Page 22: ...a PWM output to an external driver circuit for generating audible feedback to the user to indicate statuses like power up or good decode The PWM output is not strong enough to drive a beeper thus a be...

Page 23: ...uit to drive an LED to indicate a Good Read status When a good read occurs the LED pin gets pulled low for about 300ms and then the signal is back to a high level This Good Read LED output is not stro...

Page 24: ...eper beeper driver circuit LED LED driver circuit trigger reset buttons TTL 232 to RS 232 converter TTL 232 to USB converter RS 232 USB interfaces etc The EM1395 can be connected to the EVK via a 12 p...

Page 25: ...ewland id com WEB www newland id com Tech Support tech support newland id com Newland North America Inc Address 46559 Fremont Blvd Fremont CA 94538 USA TEL 510 490 3888 Fax 510 490 3887 Email info new...