Main Pcb; Cpu; Usb - Brother mfc8440 Service Manual
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Also See for mfc8440:
- User manual (426 pages) ,
- Software user's manual (183 pages) ,
- Quick setup manual (52 pages)
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1.3
Main PCB
For the entire circuit diagram of the main PCB, see
DIAGRAM'
in this manual.
1.3.1
CPU
A Fujitsu 32bit RISC CPU, SPARClite is built in the ASIC. While the CPU is driven with a clock
frequency of 66.66 MHz in the user logic block, it itself runs at 133.33 MHz, which is generated
by multiplying the source clock by two.
DATA[0]
DATA[1]
DATA[2]
DATA[3]
DATA[4]
DATA[5]
DATA[6]
DATA[7]
DATA[8]
DATA[9]
DATA[10]
DATA[11]
DATA[12]
DATA[13]
DATA[14]
DATA[15]
DATA[15-0]
6F/8F/3-6A
@C88
C270
AT-49 66.6666MHZ
@X3
@C91
0V
C2P
TP1000
C159
0V
C103
R88
VDD3
R87
The functions of the interface block communication with external devices are described below;
1.3.2
USB
Stores the data received from the PC into DRAM as controlled by the DMA controller. The
transmission speed is 480Mbps or 12Mbps.
U7
TP6
TP728
40
RA11
0
DATA00
1
8
41
DATA01
2
7
42
DATA02
3
6
43
DATA03
TP729
4
5
TP7
44
0
RA12
DATA04
1
8
45
DATA05
2
7
46
DATA06
3
6
47
DATA07
4
5
TP8
TP730
48
RA14
0
DATA08
1
8
49
DATA09
2
7
53
DATA10
3
6
54
DATA11
4
5
TP731
TP9
55
RA13
0
DATA12
1
8
56
DATA13
2
7
57
DATA14
3
6
58
DATA15
5
4
59
DATA16/IO
60
DATA17/IO
61
DATA18/IO
62
DATA19/IO
63
DATA20/IO
64
DATA21/IO
67
DATA22/IO
68
DATA23/IO
69
DATA24/IO
70
DATA25/IO
71
DATA26/IO
72
DATA27/IO
73
DATA28/IO
74
DATA29/IO
75
0V
DATA30/IO
76
TP739
DATA31/IO
196
EXINTN0
VDD3
C77
TP5
216
0V
RSTN
C101
TP705
@R100
@R103
87
SCKOUT
1
0
0
@R107
85
2
SCKIN
0
@U8
L23
1
5
Aurora
XIN
SSCLK
0.68uH
8
XOUT
6
7
TP195
FRSEL
VDD
VDD3
3
TP2
0
S1
4
TP3
0
2
S0
VSS
0V
@C83
CY25814
C103
U15
Aurora
MFC-8440/8840D/8840DN, DCP-8040/8045D/8045DN
APPENDIX 4.1 to 4.7 'MAIN PCB CIRCUIT
TP198
TP35
9
R124
33
ADR01/24
10
RA7
0
4
5
ADR02
11
3
6
ADR03
12
2
7
ADR04
TP36
13
1
8
ADR05
14
RA8
0
4
5
ADR06
15
3
6
ADR07
16
2
7
ADR08
TP37
17
1
8
ADR09
18
RA9
0
4
ADR10
5
19
3
ADR11
6
25
2
ADR12
7
TP723
26
ADR13
1
8
27
0
RA10
ADR14
4
5
28
ADR15/BA0
3
6
29
ADR16/BA1
2
7
TP724
30
ADR17/RASN
1
8
TP740
31
R129
0
ADR18/CASN
TP741
32
R130
0
ADR19/WEN
TP742
33
R125
0
ADR20/DQM0
TP725
34
R126
33
ADR21/DQM1
TP726
35
R127
33
ADR22/DQM2
TP727
36
R128
33
ADR23/DQM3
TP10
TP700
211
R92
33
ROMCSN0
ROMCSN0
TP11
TP701
212
@R95 33
6D/7D
ROMCSN1
ROMCSN1
4-7D
TP12
TP702
213
R89
33
IOWEN
IOWEN
TP13
TP703
214
R91
6D/4-7D
33
IORDN
IORDN
6D/7D/4-7D
TP14
TP196
95
R81
51
SDCLK0
SDCLK0
TP15
94
R85
7B
0
SDCLK1
SDCLK1
TP16
93
R90
3-3C
0
SDCLK2
SDCLK2
3-3C
TP17
TP722
96
R75
51
SDCKE0
TP26
97
R78
0
SDCKE1
R79
TP197
R76
TP29
R67
90
51
SDCSN0
SDCSN0
TP30
7A
89
R58
33
SDCSN1
SDCSN1
TP31
3-2D
88
R70
33
SDCSN2
SDCSN2
R73
3-2D
4.7k
TP32
92
R72
33
SDSDA
TP33
91
R68
33
SDSCL
Fig. 3-3
Fig. 3-4
3-3
VDD3
ADR[1]
ADR[2]
ADR[3]
ADR[4]
ADR[5]
ADR[6]
ADR[7]
ADR[8]
ADR[9]
ADR[10]
ADR[11]
ADR[12]
ADR[13]
ADR[14]
ADR[15]
ADR[16]
ADR[17]
ADR[18]
ADR[19]
ADR[20]
ADR[21]
ADR[22]
ADR[23]
SDCKE0
7B
SDCKE1
4.7k
3-3C
4.7k
0V
VDD3
SDSDA
3-2C
SDSCL
3-2C
SERVICE MANUAL
ADR[23-1]
5F/6C/7F/3-2E/
3-3D/4-6E/3-3C/
7A/7B/3-2D
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