Intermec 073292-001 Manual De Usuario
Chapter 4 — Theory of Operation
Dock Interface Signal Descriptions
Pin
Signal
Name
Name
Description
Signal Characteristics
3
TxD
Serial data output to dock (PXA255 FF UART)
RS-232 levels
6
RxD
Serial data input from dock (PXA255 FF UART)
RS-232 levels, 5K pull-down
4
RTS
Serial handshake output to dock (PXA255 FF UART)
RS-232 levels
8
CTS
Serial handshake input from dock (PXA255 FF UART)
RS-232 levels, 5K pull-down
7
DCD
Serial handshake input from dock (PXA255 FF UART)
RS-232 levels, 5K pull-down
5
DTR
Serial handshake output to dock (PXA255 FF UART)
RS-232 levels
9
DSR
Serial handshake input from dock (PXA255 FF UART) RS-232 levels, 5K pull-down
21
USB_D+
Serial USB bi-directional differential data
3.3V differential CMOS bi-
directional
directional
20
USB_D-
Serial USB bi-directional differential data
3.3V differential CMOS bi-
directional
directional
19
USB_5V-
5V power from USB host
2
5 VDC
5V power from computer for tethered peripherals.
+5 VDC ±5% @ 350mA
maximum
maximum
1, 13,
14, 26
14, 26
GND
GND return
10
TETH_DBP
(VIDEO)
(VIDEO)
DBP input from tethered undecoded scanner
Can be open-collector with
pull-up to 5V, or 5V CMOS
output
pull-up to 5V, or 5V CMOS
output
11
TETH_SOS
SOS input from tethered undecoded scanner. When the
TETH_PRESENT signal is high (no undecoded
tethered scanner present), the TETH_SOS signal is
used to indicate when a decoded (serial) tethered
scanner is present.
TETH_PRESENT signal is high (no undecoded
tethered scanner present), the TETH_SOS signal is
used to indicate when a decoded (serial) tethered
scanner is present.
0 = decoded scanner present
1 = no decoded scanner present
1 = no decoded scanner present
Can be open-collector with
pull-up to 5V, or 5V CMOS
output
pull-up to 5V, or 5V CMOS
output
15
TRIGGER
Trigger input from tethered undecoded scanner
Can be open-collector with
pull-up to 5V, or 5V CMOS
output
pull-up to 5V, or 5V CMOS
output
16
LASEN
Laser enable output to tethered undecoded scanner
Drives 5V CMOS input, or
NPN base with pull-up to
5V.
NPN base with pull-up to
5V.
18
DECODE
GoodRead output to tethered undecoded scanner
Drives 5V CMOS input, or
NPN base with pull-up to
5V.
NPN base with pull-up to
5V.
17
BEEP
Beep output to tethered undecoded scanner
Drives 5V CMOS input, or
NPN base with pull-up to
5V.
NPN base with pull-up to
5V.
88
CK30 Handheld Computer Service Manual