Metrologic IS4921 Spezifikationen PDF herunterladen (Seite 51)

Decode Board (TTL) Output to Host Connector

Figure 35. Decode Board (TTL) Output Connector

Pin Signal Name Function

1 232INV Input: TTL RS232 polarity control with 32k ohm pull-up.

2 Vin Power: Supply voltage input (3V to 5.5V)

3 GND Ground: Power and signal ground.

4 (n)RxD Input: TTL Level RS232 Receive data input.

5 (n)TxD Output: TTL Level RS232 transmit data.

6 (n)CTS Input: TTL level Clear to Send.

7 (n)RTS Output: TTL level RS232 Request to Send.

8 PWRDWN Output: active high = IS4920 is in power down mode.

9 nBEEPER Output: active low signal capable of sinking current.

10 nGoodRead Output: active low signal for sinking current (Good Read).

11 nWAKE Input: Signal used to bring engine out of power-down.

12 nTrig Input: Signal used as trigger input to activate the IS4920

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Metrologic IS4921 Spezifikationen Seite 51