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8. CIRCUIT DIAGRAM
8.2 MIDI
1
A
B
C
D
E
F
L
1
2
3
2V45_VCORE
R210
NC
R212
VOUTNORN
Receiver Path
HEADSET_MIC_P
HFK_MIC_P
HEADSET_SPK_P
R218
C203
47P
A
A
DATA(8:15)
2V8_VMEM
C209
U202
C212
R214
MAX4624
2
22n
33K
10n
6
5
VOUTNORP
4
Speaker Path
C211
R215
-
1
3
390p
82K
SPK_EN
_WR
C213
_MIDI_CS
R217
18p
MIDI_A0
_RD
10K
2V8_VMEM
13MHZ
_MIDI_IRQ
_MIDI_RESET
2V8_VMEM
U204
MAX4624
2
6
HEADSET_SPK_P
5
HEADSET_SPK_P1
4
HFK_SPK_P
-
1
3
HEADSET_EN
MAX4624 ACTIVE
IN
NC(4)
NO(6)
H
OFF
ON
L
ON
OFF
2
3
4
5
2V45_VCORE
2V45_VCORE
2V8_VMEM
U201
R211
R208
MAX9077
1M
1M
8
R230
3
0
1
HOOK_DETECT
4
R231
6
0
7
JACK_DETECT
5
2
R209
330K
330K
100nH
L201
4.7
R205
R201
4.7
C138
10U
(2012)
1M
A
A
R213
33K
12
18
EQ1
SPOUT2
13
17
EQ2
SPOUT1
14
EQ3
16
U203
SPVSS
28
15
_WR
YMU762
SPVDD
TP128
29
_CS
TP129
30
11
A0
HPOUT-R
31
10
_RD
HPOUT-L
32
IOVDD
R227
C220
0
4.7U
R222
0
TAN_CAP2012
A
TP130
TP117
A
R223
NC
C221
C222
2.2U
100N
(2012)
4
5
- 110 -
6
7
8
REC-
C206
1U
(1608)
REC+
Headset jack
CN201
2
4
3
1
9001-8905-040
A
Speaker
SPK-
SPK+
A
A
A
A
A
A
VBAT
U205
LP3981
1
2
VOUT
VIN
3
4
C223
VOUT_SENSE
2.2U
R221
(2012)
5
6
BYPASS
VEN
LDO_SD
0
7
6
7
8
A
B
C
D
E
F
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