Scanner Interface - Intermec CK30 Service Manual

Chapter 4 — Theory of Operation

Scanner Interface

Using the Scanner Interface Signal Set – Part 1
Signal Name
SCAN_PWR_EN*
ILLUM_LASEN_RTS
SCAN_FLASH_EN*
SOS
DBP (Video)
SPEED/RANGE/
GDRD
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Scanners are interfaced through two scanner ports on the CK30 main
PCB:
• 22-pin vertical ZIF connector J2 supports the I2 and IT4000 2D
imagers and may later be used on the EL10 Micro-mirror laser. The
signal set is as defined by HHP for the IT4000 imager.
• 16-pin vertical ZIF connector J3 supports all the remaining scan engines
and a 10-pin Stewart connector for tethered scanner support. The signal
set supports traditional laser interface signals, plus SPI and new signals
defined for the EV10 and EL10 scanners.
Because of the wide variety of scanners supported by the CK30, the
interface signals are heavily reused. The next table shows how the various
scanners use the scanner interface signal set. Blank fields mean the scanner
does not use that signal.
Source/
Destination 2D Imager usage
U11 out Enable scanner
power
0 = enable
1 = disable
FPGA_IO Enable illumination
PWM square wave
U11 out Scan enable
0 = disable
1 = enable
FPGA in VSYNC
0 between frames
1 = valid data
FPGA in HSYNC
0 between rows
1 = valid row data
FPGA out
Tethered
undecoded scanner
DBP scanner usage usage
Enable scanner power Enable scanner power
0 = enable 0 = enable
1 = disable 1 = disable
Laser enable Laser enable
0 = enable 0 = enable
1 = disable 1 = disable
Scan enable Scan enable
0 = enable 0 = enable
1 = disable 1 = disable
SOS (Start of Scan) SOS (Start of Scan)
toggles at start of each toggles at start of each
scan scan
DBP (Video) DBP (Video)
0 = black 0 = black
1 = idle, white 1 = idle, white
Speed select. GoodRead
0 = 200 scans/sec Intermec: active-low
(EV10)
Symbol: active-high
0 = 500 scans/sec
(EL10)
1 = 36 scans/sec
(EV10)
1 = 65 scans/sec (EL10)
SE900 config bit 0
SE1200 aim beam
CK30 Handheld Computer Service Manual
(10-pin only)