Motorola Symbol MS4404 Integration Manual page 40

4 - 2 Symbol MS4404/MS4407 Integration Guide
lists the pin functions of the Symbol MS4404 interface.
Table 4-1
Symbol MS4404 True RS-232 Electrical Interface
Table 4-1
Pin No. Pin Name
1 Trigger
2 TXD
3 RXD
4 NC
5 Ground
6 Power
7 CTS
8 RTS
9 Beeper/Download
NC = No Connect (Do not connect this pin)
*I = Input O = Output
Type*
I Signals imager to begin decoding session.
O Serial data transmit output. Drives the serial data receive
input on the device communicating with the imager.
I Serial data receive input. Driven by the serial data transmit
output on the device communicating with the imager.
Power supply ground input and signal ground reference.
I 5.0 VDC - 12 VDC ± 10%
I Clear-to-send handshaking input line, used only in
conjunction with the RTS line. Optionally used by another
device to signal the imager to begin transmitting data.
O Request-to-send handshaking output line, used only in
conjunction with the CTS line. Optionally used by the imager
to signal another device that data is available to send.
I/O During normal operation this signal functions as an external
beeper drive line. This signal can sink 50mA of current to
drive an external beeper, and is normally pulled up. This
signal is also used to begin Flash Download operation when
grounded externally during power up.
Function