Starting Sequence - Yamaha QL5 Manual

QL5/QL1

STARTING SEQUENCE

● Start mode (Flow)
Normal mode
Power ON
Boot Loader started
Initialization of port
USB Memory presence
Check if QL Firmware (PGM C-MD1.bin) file is present
(Not present) (PGM file present)
or
(C-MD1.bin file present)
Firmware Update
Displayed as confirmed
(UPDATE cancelled)
Firmware Update
Executed
Checksum of the main program confirmed
"CheckSum Error!" is displayed and the
sequence is stopped.
Main Program started Text within <> is the task name
Initialization of port ..... PLL action starts, set the reset terminal of each device to reset
Start Kernel
Decompress the data compressed in the ROM to the SDRAM. <SysKernel>
BUS Initial Settings <SysKernel>
- Cancel I2C (P-BUS) Reset, cancel E-BUS Reset
- E-BUS driver initialization and E-BUS START
- I2C driver initialization and P-BUS START
Check if the panel circuit board is present.
<SysKernel>
(Not present)
Pressed switches are read →
start-up mode judged
Opening screen displayed. <LCD Display>
When the start-up mode is Diag.
MRAM checksum judged <SysKernel>
(OK) Current memory (MRAM) all cleared
(NG)
174
Forced Factory Preset mode
A SEL + B SEL key
If not present, the
start-up mode changes
to Diag mode.
Current memory (MRAM) all cleared
SCENE data (Flash memory) all cleared
[Initializing Flash Memory...] displayed
Maintenance mode
B SEL key
or
B SEL + 32(16)CH SEL key
Diag mode
Press USER DEFINED keys 1, 2
and 3 simultaneously or 3 keys of
other than those simultaneously.
LCD Diag screen displayed, processed
<LCD Display>
Panel Diag displayed, processed
Power turned off.
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