Intermec CK30

Chapter 4 — Theory of Operation
HCR Output Signal Descriptions (continued)
HCR Bit Function Signal Description Usage
U16 20 CF_RESET Compact Flash slot 0 Reset (unused in CK30). 0 = idle
1 = reset
U16 21 USB_EN Enables pull-up on USB bus to acknowledge host and start
communications. This can be used to hold off USB
communications until the USB driver is ready, or to disconnect a
USB session in progress (simulated cable disconnect).
0 = USB
disconnect
1 = USB connect
U16 22 LCD VEE_EN LCD bias supply enable. 0 = off
1 = on
U16 23 BKLT_ON Backlight On/Off control. 0 = off
1 = on
U11 0 BKLT_LOW Backlight level. 0 = high
1 = low
U11 1 DOCK_EN Enables RS-232 communications through the 26-pin dock port.
Also used to switch tethered scanner power to dock connector.
This should be turned off on Suspend unless the computer has
been configured to support trigger-resume on a tethered scanner
plugged into the dock port.
0 = disable dock
serial and tethered
power
1 = enable dock
serial and tethered
power
U11 2 DISPLAY_EN High enables LCD module logic. 0 = LCD logic off
1 = LCD logic on
2D imager usage: aiming LED control. 1 = Aim
S9C decoder usage: Trigger signal. 0 = Trigger
EV10 usage: 1D/2D select. 0 = 1D and 2D
1 = 1D
SE900 usage: spotter beam. 0 = Aim
SE900HS usage: 1D/2D. 0 = 2D
1 = 1D
Tethered scanner usage: Auto-detect enable/disable. 0 = enable auto-
detect
U11 3 TRIG_AIM*
E2010 usage: Reset. 0 = reset
U11 4 SCAN_PWR_EN* Scanner power control.
This should be turned off on Suspend unless the computer has
been configured to support trigger-resume on a tethered scanner
plugged into the 10-pin port.
0 = scanner power
on
1 = scanner power
off
U11 5 SCAN_12C_EN* U34 gate control to isolate the 2D imager from the I2C bus
when it is powered down.
0 = imager
isolated from
I2C bus
1 = imager
connected to
I2C bus
U11 6 LASEN Originally defined as a scanner control signal, this HCR output
is now unused. Its function was moved to the FPGA.
N/A
U11 7 -FPGA_RESET Reset the FPGA logic and FIFOs. 0 = reset
1 = idle
46 CK30 Handheld Computer Service Manual