Service manual

Section II: Bridge

Diagnostics 3-3

3.3 Bridge Debugger User Interface

This section describes the debugger user interface including:

• Terminal code identiﬁers

• Bridge states

• Error codes

• Bridge commands

• Sensor status information

• Parameters

• Bridge/buffer commands

3.1.1 Terminal Code Identiﬁers

3.1.2 Bridge Unlock Sequence

The bridge must be unlocked by a special sequence prior to sending any normal

bridge commands. If you attempt commands while the bridge is locked, the com-

mand echoes back preceded by an “l.” Note that the unlock sequence is automati-

cally sent to the bridge/buffer module immediately after system boot-up (if OLP is

enabled).

UNLOCK Sequence: Codes sent from DEC: c40 c20 c60

Key Sequence from Terminal: @ <SPACE> ‘

i Bridge Internal State

c Command from DEC

d Command from Debug Terminal

r Response to Command (status or acknowledge)

s Sensor Information

e Error Code

l Bridge is in a locked State

p Parameter Value (high byte, low byte)