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SP2060
I
SYSTEM FLOW CHART
Purpose
SP2060 is provided with the test program for diagnosing the hardware.
However, when the test program can not be activated, the troubleshooting is hard.
The system flow chart shows the software's action flow after releasing reset and may help you to troubleshoot.
CPU data processing sequence
Power ON
(reset)
Release CPU Reset
(Action starts in Flash ROM)
SDRAM initialization
Send Boot and Program to
SDRAM
Boot starts in SDRAM
Internal/external devices INITIAL-
IZE and Initialization display
[UTILITY]+[NEXT]
Key pressing check
Program sum check
(Program damage check)
Program starts
Internal/external device reinitialize
and display
Measuring battery voltage
Key pressing check
Start sequence end
After this, proceed to scene recall
and network setting
70
Test program
mode
Sum error
Download
Mode
[BACK]
INITIALIZE
mode
LCD display
LCD initializing display
Speaker Processor
YAMAHA SP2060
H<->L
LCD Copyright display
Copyright 2006
YAMAHA
Scene Recalling
Network Setup
CPU PTJ [7] (186 pin output)
State
Description
H
H by CPU internal
pull-up resister.
L
Sets L when ini-
• Can not release
tializing CPU port.
• Can not access
H
Changes to H be-
FLASH ROM de-
fore initializing ex-
fect, ASDRAM de-
ternal device.
fect
L
Changes to L after
External device
starting task data
defect
processing.
(After that, LCD ini-
tializing display)
Changes H/L ev-
ery 500msec.
Cause of stop
CPU Reset.
to FLASH ROM.
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