Ieee1284; Rom - 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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CHAPTER 3 THEORY OF OPERATION
1.3.3
IEEE1284
Stores the data received from the PC into DRAM as controlled by the DMA controller. It is
applicable to both normal receiving and bi-directional communication (nibble mode, byte mode,
ECP mode).
74LVX161284, 3.3V
connector side
INITN
5D
SEINN
5D
HBUSY
5D
STBN
5D
CDCC_D[0]
CDCC_D[1]
CDCC_D[2]
CDCC_D[3]
CDCC_D[4]
CDCC_D[5]
CDCC_D[6]
CDCC_D[7]
CDCC_D[7-0]
3A
1.3.4
ROM
5.0V level shifter IC stores the pull-up resistance in signal wire at the
L
PC
Printer
H
Printer
PC
CDCC_DIR
2B
CDCC_HD
2B
0V
CDCC_D[7-0]
1C
CDCC_D[0]
CDCC_D[1]
CDCC_D[2]
CDCC_D[3]
CDCC_D[4]
CDCC_D[5]
CDCC_D[6]
CDCC_D[7]
U7
230
245
CDCCINITN
CDCCACKN
229
244
CDCCSINN
CDCCBUSY
228
243
CDCCHBUSY
CDCCPEN
227
242
CDCCSTBN
CDCCSLCT
241
CDCCFLTN
240
CDCC_D0
239
CDCC_D1
INITN_IN
238
CDC-.cir/2B
CDCC_D2
SELINN_IN
CDC-.cir/2B
235
CDCC_D3
HBUSY_IN
234
CDC-.cir/2B
CDCC_D4
STBN_IN
233
CDC-.cir/2B
CDCC_D5
232
CDCC_D6
231
CDCC_D7
Aurora
0V
U11
48
18
DIR
VCC
VDD3
1
7
HD
VCC
34
31
GND
VCC_CABLE
VDD5
42
VCC_CABLE
10
GND
0V
15
GND
39
GND
8
41
D[0]
A1
B1
9
40
D[1]
A2
B2
11
38
D[2]
A3
B3
12
37
D[3]
A4
B4
13
36
D[4]
A5
B5
14
35
D[5]
A6
B6
16
33
D[6]
A7
B7
17
32
D[7]
A8
B8
2
47
A9
Y9
3
46
A10
Y10
4
45
A11
Y11
5
44
A12
Y12
6
43
A13
Y13
HBUSY_IN
29
20
C14
A14
28
21
SELINN_IN
C15
A15
27
22
INITN_IN
C16
A16
26
23
STBN_IN
C17
A17
19
30
PLHIN
PLH
TP998
24
25
HLH
HLHIN
TP999
74LVX161284
0V
INITN
1B
SEINN
1B
HBUSY
1B
STBN
1B
Fig. 3-5
Fig. 3-6
3-4
0V
D[7-0]
CDC-.cir/3C
TP118
R113
33
TP119
CDC-.cir/1B
R115
33
TP120
CDC-.cir/1B
R119
33
TP121
CDC-.cir/1B
R131
33
CDC-.cir/1B
DA2
DA3
DF5A6.8FU
0V
D[7-0]
CDC-.cir/3A
TP122
D[0]
RA6
33
1
8
D[1]
2
7
D[2]
6
3
D[3]
4
5
D[4]
RA5
33
1
8
D[5]
2
7
D[6]
TP123
3
6
D[7]
5
4
DA4
DA5
DF5A6.8FU
0V
CN5
18
VDD5
+5V
16
0V
17
0V
19
0V
20
0V
21
0V
22
0V
23
0V
24
0V
25
0V
26
0V
27
0V
28
0V
29
0V
30
0V
0V
10
ACK
11
BUSY
12
PE
13
SELECT
32
FLT
14
ATFEED
36
SELIN
31
INPRIM
1
STB
ZD1
UDZS6.8B
DF5A6.8FU
2
DI1
3
DI2
4
DI3
5
DI4
6
DI5
7
DI6
8
DI7
9
DI8
15
NC
NC
33
NC
NC
34
NC
NC
35
NC
NC
DF5A6.8FU
37
FG
IF_FG
38
IF_FG2
FG
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