Intermec CK30

Chapter 4 — Theory of Operation
Dock Interface Signal Descriptions
Pin
Signal
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
20 USB_D- Serial USB bi-directional differential data
3.3V differential CMOS bi-
directional
19 USB_5V- 5V power from USB host
2 5 VDC 5V power from computer for tethered peripherals.
+5 VDC ±5% @ 350mA
maximum
1, 13,
14, 26
GND GND return
10
TETH_DBP
(VIDEO)
DBP input from tethered undecoded scanner
Can be open-collector with
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.
0 = decoded scanner present
1 = no decoded scanner present
Can be open-collector with
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
16 LASEN Laser enable output to tethered undecoded scanner
Drives 5V CMOS input, or
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.
17 BEEP Beep output to tethered undecoded scanner
Drives 5V CMOS input, or
NPN base with pull-up to
5V.
88 CK30 Handheld Computer Service Manual