Intermec CK30 Service Manual page 98

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