Intermec 073290-001 用户手册

下载
页码 113
Chapter 4 — Theory of Operation 
A custom debug board supporting Ethernet, logic analyzer connectors, 
hexadecimal debug LEDs, and test and reset switches connects to these 
connectors through a buffered “pod board” and flex and ribbon cable 
assembly: 
073274 PCB 
ASSY,DEBUG,CX1 
073418 
FLEX CIRCUIT,J34,TEST FIXTURE 
073419 
FLEX CIRCUIT,J33,TEST FIXTURE 
073420 
FLEX CIRCUIT,J35,TEST FIXTURE 
591813 CBL,RIBBON,68 
POS,SHIELDED 
J33 is pinned out to be compatible with the commercially available 
Microsoft Debug Board. See the Microsoft Debug Board Specification, 
V2.4, for details. 
Firmware Upgrade 
Bootloader 
For the current release (version 1.01.01.0229) of the CK30, the only 
upgrade route for the bootloader is to cold boot the CK30 with an SD 
card containing an image of the new bootloader. The bootloader is divided 
into 2 parts – Primary and Secondary. Only the Secondary portion is 
intended to be field-upgradeable; the Primary bootloader is fixed. This is 
partly for risk reduction: the Primary bootloader is responsible for reading 
the upgrade image from the SD card and writing it to flash. If the Primary 
bootloader were to become corrupted while upgrading itself, the CK30 
would become unusable and would have to be returned to a service depot 
for repair. 
In the event the Primary bootloader becomes corrupted or needs service 
depot upgrade, it can also be reflashed using Intel’s JFLASH utility 
through the P1 JTAG port (See “Field-Access Debug Port” on page 93), 
using a parallel port JTAG cable such as the Insight Model IJC-2. 
OS Image 
For the current release (version 1.01.01.0229), the only way to upgrade 
the OS image is to cold boot the CK30 with an SD card containing an 
image of the OS image. The Primary bootloader boots the system and 
looks for a new image file on an installed SD card. If the card and file are 
present, the bootloader downloads the image into SDRAM, erases the 
relevant portions of the system flash, then writes the OS image to flash. 
When the write is complete, the system cold boots into the new image. 
CK30 Handheld Computer Service Manual 
95