18770_251_100216.eps
100216
No
EJTAG probe
connected ?
No
Yes
Release AVC system reset
Feed warm boot script
Cold boot?
Yes
No
Set I²C slave address
of Standby μP to (A0h)
An EJTAG probe (e.g. WindPower ICE probe) can be
connected for Linux Kernel debugging purposes.
Detect EJTAG debug probe
(pulling pin of the probe interface to
ground by inserting EJTAG probe)
Release AVC system reset
Feed cold boot script
Release AVC system reset
Feed initializing boot script
disable alive mechanism
Off
Standby Supply starts running.
All standby supply voltages become available.
st-by μP resets
Stand by or
Protection
Mains is applied
- Switch Audio-Reset high.
It is low in the standby mode if the standby
mode lasted longer than 10s.
start keyboard scanning, RC detection. Wake up reasons are
off.
If the protection state was left by short circuiting the
SDM pins, detection of a protection condition during
startup will stall the startup. Protection conditions in a
playing set will be ignored. The protection mode will
not be entered.
Detect2 is moved to an interrupt. To be checked if
the detection on interrupt base is feasible or not or if
we should stick to the standard 40ms interval.
+12V, +24Vs, AL and Bolt-on power
isswitched on, followed by the +1V2 DCDC converter
Enable the supply detection algorithm
Switch ON Platform and display supply by switching
LOW the Standby line.
Initialise I/O pins of the st-by μP:
- Switch reset-AVC LOW (reset state)
- Switch reset-system LOW (reset state)
- Switch reset-Ethernet LOW (reset state)
- Switch reset-USB LOW (reset state)
- Switch reset-DVBs LOW (reset state)
-keep Audio-reset and Audio-Mute-Up HIGH
Enable the DCDC converters
(ENABLE-3V3n LOW)
No
Detect2 high received
within 2 s econds?
12V error:
Layer1: 3
Layer2: 16
Enter protection
Yes
Wait 50ms
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