Intermec 073298-001 ユーザーズマニュアル

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Chapter 4 — Theory of Operation 
Dock Interface Signal Descriptions 
 
Pin 
Signal 
Name 
 
Description 
 
Signal Characteristics 
TxD 
Serial data output to dock (PXA255 FF UART) 
RS-232 levels 
RxD 
Serial data input from dock (PXA255 FF UART) 
RS-232 levels, 5K pull-down 
RTS 
Serial handshake output to dock (PXA255 FF UART)  
RS-232 levels 
CTS 
Serial handshake input from dock (PXA255 FF UART) 
RS-232 levels, 5K pull-down 
DCD 
Serial handshake input from dock (PXA255 FF UART) 
RS-232 levels, 5K pull-down 
DTR 
Serial handshake output to dock (PXA255 FF UART)  
RS-232 levels 
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 
 
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