Emerson ATCA-S201 Manuale Utente

RTM-ATCA-SXXX Overview 

6806800H62B 

ATCA‐S201 Installation and Use Guide 

 

101 

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 
electrical 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.