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Chapter
1
Introduction
Bar Code Input Port
M90 Port Usage
8
There is one bar code input port plus an integrated bar code scanner on
the M90. The bar code port is for bar code scanning devices such as bar
code wand, wand-emulation CCD, or laser-diode scanners. Depending on
its connection, the scanner may turn the unit on by scanning without
pressing the ON or OFF keys.
The M90 defines four ports. The following table shows the various port
usages. See the Glossary for usage abbreviations. Port T (keyboard) Serial
channel 1 (COM port)
M90 Port Usage
Port
Bit
0
0
1
2
3
4
5
6
7
1
0
1
2
3
4
5
6
7
2
0
1
2
3
4
5
6
7
20h
0
1
2
3
4
5
6
7
Usage
RTS
CTS
DTR
SHUT213
KEY_OUT0
KEY_OUT1
KEY_OUT2
KEY_OUT3
NMI/POWER FAIL
WAND
KEYBOARD
RTC
BACKLIGHT
SPEAKER
SOS
OUT0
GOOD READ
CS
No connection
SCAN_EN
LCD_VO
CN6–2 (Laser/CCD control)
No connection
AUTOOFF
BAT2_LOW
PF0
No connection
No connection
BAT1_LOW
Switch detect (Laser/CCD)
COLDSTART
DSR/RI
M90 Series Portable Data Entry Unit Reference Manual
I/O
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
IN
IN
IN
IN
OUT
OUT
IN
OUT
OUT
OUT
N/A
OUT
OUT
OUT
N/A
OUT
IN
IN
N/A
N/A
IN
IN
IN
IN
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