3. TECHNICAL BRIEF
- 52 -
CPU INTERFACE
CPU interface is an 8-bit parallel.
4 control signal(/wr,/rd,/cs,A0 pin), 8 data bit(D0 to D7), and 1 interrupt pin(/IRQ), totaling 13 pins are
connected to the external CPU. This block controls the writing and reading of data by the input polarity
of control signal
INTERFACE REGISTER
This registeris able to access directly from the external CPU. There are 2 bytes spaces. The
Intermediate register can be accessed through the interface register.
INTERMEDIATE REGISTER
This register is accessed through the Interface register.
It is composed to access a latter control register and ROM/SRAM through Intermediate register.
This register is called “Intermediate register” since this exists in the middle of the interface register and
the Control register.
In the Intermediate register, there are some registers to control various functions.
Close to SPEAKER
0
R718
0.1u
C729
2V8_MV
0.1u
C720
C727
1u
C718
47p
0.1u
C722
C701
C719
0.1u
0.1u
120p
C700
30K
R703
C724
4.7u
C726
1u
R715
NA
C708
1000p
C709
0.022u
0
R717
TP700
VBAT
C716
NA
1u
C725
1V8_MV
C717
47p
33K
R704
0.1u
C723
R701
68K
0
68K
R719
R702
3.3K
R706
C730
1u
C728
0.1u
1u
C721
R710
0
R716
0
H8
A6
SPVDDL
SPVDDR
J6
SPVSSL
A7
H7
SPVSSR1
SPVSSR2
J7
TXOUT
E8
F7
VREF
H3
_CS
D4
_IRQ
_RD
H4
B4
_RST
J2
_WR
IOVDD1
IOVDD2
B3
LDE1_GPIO4
C2
C3
LED0
B1
LED2_GPIO5
LRCK
D3
MTR
B2
A1
NC1
NC2
A8
NC3
J1
PLLC
H5
C6
RXIN
D1
SDI
SPOUT1L
B7
J8
SPOUT1R
SPOUT2L
B8
SPOUT2R
J5
EQ2L
A4
G6
EQ2R
A5
EQ3L
EQ3R
H6
EXC
G7
EXTIN
B6
D7
EXTOUT
GPIO0
D6
GPIO1
C5
C1
GPIO2
C4
GPIO3
HPC
F6
HPOUTL
C8
HPOUTR
C7
D8
HPVSS
H1
CLKI
D0
H2
G3
D1
D2
G2
F3
D3
D4
G1
F2
D5
D6
E3
E2
D7
J4
DVDD1
A2
DVDD2
DVDD3
F1
DVSS1
J3
A3
DVSS2
E1
DVSS3
B5
EQ1L
EQ1R
U703
A0
G4
G8
AVDD
AVSS
F8
BBL
E6
E7
BBR
BLCK
D2
G5
YMU787
SPK_P
SPKPM
I2S_SDO
MIDI_HP_L
MIDI_HP_R
DATA12
DATA13
DATA14
DATA15
I2S_WS
SPK_N
I2S_SCK
ADD00
13MHz
_MIDI_CS
_RD
_MIDI_RST
_MIDI_IRQ
_WR
DATA08
DATA09
DATA10
DATA11
Figure 3-24. YMU787 CIRCUIT DIAGRAM
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Summary of Contents for MG300d
Page 23: ...3 TECHNICAL BRIEF 24 Figure 3 1 SKY74400 FUNCTIONAL BLOCK DIAGRAM Z 3 X B O X C O M ...
Page 83: ...4 TROUBLE SHOOTING 84 4 6 LCD Trouble EMI FILTER CN600 Test Points Z 3 X B O X C O M ...
Page 110: ...5 DOWNLOAD AND CALIBRATION 111 8 Push the START button Z 3 X B O X C O M ...
Page 111: ...5 DOWNLOAD AND CALIBRATION 112 9 Phone test Finish is shown in below screen Z 3 X B O X C O M ...
Page 112: ...6 BLOCK DIAGRAM 113 6 BLOCK DIAGRAM Z 3 X B O X C O M ...
Page 113: ... 114 Z 3 X B O X C O M ...
Page 124: ... 125 MG300d 8 PCB LAYOUT Z 3 X B O X C O M ...
Page 125: ... 126 MG300d 8 PCB LAYOUT Z 3 X B O X C O M ...
Page 137: ... 138 Z 3 X B O X C O M ...
Page 138: ... 139 Z 3 X B O X C O M ...
Page 140: ... 141 12 EXPLODED VIEW REPLACEMENT PART LIST Z 3 X B O X C O M ...
Page 141: ... 142 Z 3 X B O X C O M ...