Philips 37PF9631D/37 Service Manual page 19

Activate supply detection algorithms for
(pulling pin of the probe interface to
ground by inserting EJTAG probe)
No
Release viper reset
Feed warm boot script(2)
Release PNX2015 reset 100ms after
No
No
To Part C To Part C
Service Modes, Error Codes, and Fault Finding
From Part A
detect-1V2
No
received within
250ms?
Yes
Enable the DC/DC converters for
+2.5V and +3.3V.
Start polling the detect-2V5
and detect-3V3 every 40ms
detect-2V5 and
detect-3V3 received within No
250 ms?
Yes
+1.2V, +2.5V and +3.3V
SUPPLY-FAULT I/O line
Yes
is High?
No
Enable the supply fault detection
interrupt
Set I²C slave address
of Standby µP to (A0h)
Detect EJTAG debug probe
EJTAG probe
connected ?
No
Cold boot?
Yes
Release viper reset
Feed cold boot script(1)
Viper reset is released
Bootscript ready
in 1250 ms?
Yes
Set I²C slave address
of Standby µP to (64h)
RPC start (comm. protocol)
Flash to Ram image
transfer succeeded
within 30s?
Yes
To Part C
Figure 5-6 "Off" to "Semi Stand-by" flowchart (part 2)
From Part A
+1.2V error
SP
+2.5V or +3.3V error
SP
Supply fault error
SP
Yes
Release viper reset
Feed initializing boot script (3)
disable alive mechanism
Release PNX2015 reset 100ms
after Viper reset is released
To Part C
EJ2.0U LA 5.
From Part A From Part A
activate +8V6 supply
+8V6 error
detection algorithm
SP return
action holder: MIPS
action holder: St-by
autonomous action
G_15990_103b.eps
EN 19
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