10.Technical Description
1 Board configuration
Name
Name of the board
Major features
Mother Board
MGH-106A
Main control, Sound source
processing and E
ff
ect process-
ing
Peripheral board
MXH-40A
D/A&A/D, Amplify audio sig-
nal, Vacuum tube, Supply the
power, Key scan, Jack I/F and
so on
Left side switch board of the panel
SWH-536A
Left side panel control
End block of the switch board
SWH-537A
End block SW/LED
Right side switch board of the panel
SWH-538A
Right side panel control
Jack board
CNH-44A
Jack of the bottom surface
Keyboard contact board
KCH-21A/22A/23A
Keyboard contact matrix
Drawbar board
VRH-50A/50B
Drawbars one set of nine
2 The details of the each board
2.1 Mother board MGH-106A
This board performs main control, MTWI sound source processing (refer the
ʠ
sound engine
system
ʡ
for the details) and e
ff
ect processing. Transmit the sound by serial data (
I
2
S,TDM8ch).
It consists of the following parts mainly.
•
Main processor i.MX6Quad: Main control and sound source processing
ARM 9 Quad core, 1GHz
NXP (manufactured by Freescale)
•
External memory for main processor
–
Work memory DDR3 RAM 2Gbit 4pcs
–
Program, Data microSDHC Memory Card 2pcs
–
Temporary data FRAM 128Kbyte
•
Power supply for main processor
•
DSP C6657 : E
ff
ect processing
Dual core,1GHz
Manufactured by TI
10-1
