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RTM-ATCA-SXXX Overview
6806800H62B ATCA‐S201InstallationandUseGuide101
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Erasing 256 Kibyte @ 31c0000 -- 99 % complete.
Programming /dev/mtd2
Verifying rootfs.ext2.gz.uboot
Successful update of flash /dev/mtd2 from file rootfs.ext2.gz.uboot
/nvdisk/mnt #
9.4 Emergency firmware recovery, theory of operation
The ATCA-S201 hardware actually contains two copies of flash code. The primary
image used for normal customer carrier operation, while the second image contains
a backup copy preserved for emergency firmware recovery tasks. The contents of
the backup flash remain fixed at time of manufacturing and there is no end-user
mechanism to modify its contents. This ensures the device is not accidentally re-
written or erased. A jumper on the ATCA blade is used to instruct the CPU to boot
either the primary flash (normal) or the secondary flash (emergency recovery).
9.4.1 Jumper Settings
The ATCA-S201 carrier board includes jumpers that are used for special recovery and
reset procedures. Jumper locations are shown in Figure 30. Jumpers create an
electr
ical connection between two pins which can be sensed by circuitry on ATCA-
S201 to enter special service modes or behavior. Pin 1 is identified with a square
solder pad on the printed circuit board. Jumper behavior is described below.
Table 37 JP1, jumper for primary/recovery Flash selection
JP1 Jumper
Setting
Description
Short Pin 1-2 Normal setting. When in this position, the jumper indicates
that boot is loaded from the primary flash device.
Short Pin 2-3 Service setting. When in this position, the jumper indicates
that boot code is loaded from the secondary flash device.
Table 38 JP2, jumper for clearing master password
JP2 Jumper
Setting
Description
Short Pin 1-2 Normal setting. When in this position, the jumper indicates
the master password is preserved in flash.
Short Pin 2-3 Service setting. When in this position, the jumper indicates
the master password shall be cleared.