Sharp AM-900 Service Manual page 109

2. Main Controller Block (1b/10)
E
Main Controller Block (2/2)
R2 100
77
78
80
BR1
81 33 x4
82
83
86 BR2
87
33 x4
88
89
91 BR3
92 33 x4
93
94
96
BR4
97 33 x4
98
99 R10 R10 33 33
101
R12 R12 33 33
102 R14 R14 33 33
103 R16 R16 33 33
104
R18 R18 33 33
118
106 R21 33
107
108 BR5
109 33 x4
111
112
113
BR7
114 33 x4
116
119
122 BR8
123
33 x4
124
125
R24 33
127 R25 33 33
128
R26 33
129 R27 33
130 R28 33
173
174
175
176
161 R31
N.M.
R32
0
138
DG
R34
0
139
140
137
C274
0.1U
DG
189
190
DG
186
187
DG
188
191
195
194
192 R56 27.4-F (1608)
193 R57 27.4-F (1608)
199
200 R61 1.5K
197
R63 24.9K-F
198
196
162
163
R463 0
165
167 AG
168
169
164
170
166
42
AG
43
44
45
47
48
49
50
46
+3.3V
41
C31
51
0.1U
DG
184
185
10
22
38
66
76
85
95
C275
105
1U
115
121
131
141
152
160
171
182
207
DG
E
F
SDRAM_DATA[15:0]
/ROM_CS (2-C2)
SDRAM_DATA0
SDRAM_DATA1
SDRAM_DATA2
SDRAM_DATA3
SDRAM_DATA4
SDRAM_DATA5
SDRAM_DATA6
SDRAM_DATA7
SDRAM_DATA8
SDRAM_DATA9
SDRAM_DATA10
SDRAM_DATA11
SDRAM_CKE
SDRAM_DATA12
SDRAM_DATA13 R6
SDRAM_DATA14 4.7K
SDRAM_DATA15
DG
SDRAM_DQMA0
(2-B4)(2-C2)
SDRAM_DQMA1 (2-B4)(2-C2)
/SDRAM_CS0 (2-B5)
SDRAM_CLK (2-B5)
SDRAM_ADDR12
SDRAM_ADDR11
SDRAM_ADDR10
SDRAM_ADDR9
SDRAM_ADDR8
SDRAM_ADDR7
SDRAM_ADDR6
SDRAM_ADDR5
SDRAM_ADDR4
SDRAM_ADDR3
SDRAM_ADDR2
SDRAM_ADDR1
SDRAM_ADDR0
SDRAM_ADDR0
SDRAM_BANK1 (2-B5)(2-C2)
SDRAM_BANK0 (2-B5)(2-C2)
(2-B5)(2-C2)
/SDRAM_RAS
(2-B5)(2-C2)
/SDRAM_CAS
(2-B5)(2-C2)
/SDRAM_WE
+3.3V
(2-G5)
TCK
(2-G5)
TMS
(2-G5)
TDI
R30
(2-G5)
TDO
N.M.
A2
C3
RTCXI (1-H5)
0.01U-K
C4 18P
X1
32.768KHz
DG
C5 18P
R35 0
DG
RTCXO (1-H5)
R37 N.M.
+3.3V
R44 0
+3.3V
C8
0.1U DG
D2
N.M.(MC2850)
DG
C13 C14
0.01U-K
0.1U
(4-F6)
CISAIN
R78 0 (1608)
+3.3VR
R79 N.M. (1608)
+3.3V
C25
0.1U
+
C26
220U/10V
C24
0.01U-K
R83 0 (1608)
AG DG
R87 0 (1608)
+1.8V
+
C54
C52
10U/16V
0.01U-K
R88 0 (1608)
C53
2.2U (1608)
DG
F
G H
(2-B3)(2-E6)
RTC_DATA
(1-C3)
RTC_CLK
(1-C3)
(2-B4)
(1-C3) RTC_CE
SDRAM_ADDR[12:0] (2-A6)(2-B3)
R23
N.M. (1608)
DG
R29
0
K
/RESET (2-A2)(2-D2)
(2-G5)(2-H3)
D1
R33 22K
N.M. (RB715F)
R427
2
0
+1.8V R428
1
0
VRTC
C17 R39
L1
33K
0.1U
1012AH-1012=P2
DG
USB_DM
USB_DP
USB_VBUS
0 (1608)
R58
+3.3V
+
C15
10U/16V
R66 0 (1608)
DG
C19
0.1U
C22
10U/16V
C27 + C29 C30
0.1U 0.1U
0.1U
C28
R84 0 (1608)
10U/16V
AG DG
R459 0 (1608)
R460 0 (1608)
R82 0 (1608)
AG DG
G H
6 – 2
I
1/10
+3.3V
IC2
N.M.
R4
N.M.
7 8
VBAT
SIO VDD
6
C2
SCK
N.M.
5 4
CS VSS
R8
1 INT
N.M. DG
DG
(1-F4) RTCXI
(1-F4) RTCXO
DG
D5
N.M.(DF3A5.6LFU)
CNUSB
DUSB-BRA42-T11(D2)
1 5
VBus Shield1
3
2 6
D- Shield2
3 7
D+ Shield3
4
4 8
GND Shield4
C289 0.47U (3216)
DG
USBFG
I
AM-900U
6
5
4
3
2
1