Intermec 073292-001 User Manual

No Battery 

Red LED off. 

 

Low Battery 

The red CK30 LED turns on continuously while 
CK30 is running once battery voltage falls below the 
software low-battery threshold. This continues until 
Suspend – either by the I key or when the battery 
falls below the hardware critical battery threshold. 

Red LED flashes twice when: 

The IO key is pressed when the CK30 is suspended 
and the battery is too low to resume. 

The battery level crosses below the hardware critical 
battery threshold. 

The main battery is removed. 

PSC turns off the LED when it 
sees system has suspended 
(PWR_EN=0). 

All instances of the red LED 
flashing are driven directly by 
the PSC. 

Good Battery 

Red LED off. 

 

Warm Boot 

Red LED flashes once when the warm boot 
completes. 

The power management driver 
commands the single flash. This 
is a momentary false “low-
battery” indication that results 
from the time needed to 
average enough battery level 
samples to exceed the software 
low-battery threshold. 

Cold Boot 

Red LED flashes three times when the PSC comes 
out of reset and initiates the cold boot, then once 
more when the boot completes. 

The three flashes are driven 
directly by the PSC. 

The power management driver 
commands the single flash. This 
is a momentary false “low-
battery” indication that results 
from the time needed to 
average enough battery level 
samples to exceed the software 
low-battery threshold. 

Pushbutton switch SW1 (inside the battery compartment) is used for user-
commanded hard reset in the CK30. 

Hard reset asserts the PSC (U38) reset input, which in turn asserts the 
PXA255 reset input once a good main battery is installed. This clears all 
PXA255 functions to a known state and asserts the PXA255 reset output, 
resetting the system flash.