Specifications

HOST CONNECTIONS

The Port-Powered MiniMag reader is connected to a 9-pin male

serial port on a host (such as a PC) using a DB9 female connec-

tor. Pinout designations are as follows:

PIN SIGNAL

2 TXD

3 RXD

4 DSR (Supply Voltage in)

5 GND

POWER-ON INITIALIZATION

The MiniMag will always transmit an identiﬁ cation string within

2 seconds after it powers up. The identiﬁ cation string has the

following format:

The <compressed part number> is eight characters and the

<revision information> is three characters.

SLEEP & WAKE-UP

The reader uses a sleep mode to save power when not in use.

The reader wakes-up when a card is swiped. After the card data

is transmitted the reader returns to the sleep mode. The LED

will remain on to show the “ready to read” condition.

The reader also wakes-up 5ms after receiving a character from

the RS232 port. The reader will stay awake for about 100ms to

receive any commands from the host. The reader returns to sleep

mode after commands are processed.