Brother HL-4050CDN - Page 310

Confidential
6-6
Main PCB Circuit Diagram (6/6)
D
B
A
C
E
F
E
D
B
A
C
F
1 5
1 5678432
678432
ADR[24-1]
(2)1BANK of X16 SDRAM
SDWEN
Pin name
DATA[15-8]
33MHz
0
I/O Buffer (3.3V) Schmitt in 3mA
50MHz
Buffer Type
I/O Buffer(3.3V) 3mA, 50k Pull-up
R
R
10
Pin name
0
SDCLK2
Pin name
CDCC GA
TDOPAC33NN03
33
Pin name
TDBIADIMNN**
SDCLK1
5MHz
ROM0
R
Buffer Type
Main
ASIC
ROM1
TDBIADIMNN**
I/O Buffer (3.3V) 9mA
R
(SL4C=12mA)
5MHz
50MHz
Buffer Type
Pin name DATA[15-0]
R
0
2BANK of X8 SDRAM
(2)1BANK of X16 SDRAM
22
50MHz
Buffer Type
Main
ASIC
Buffer Type
R
Output Buffer (3.3V) 18mA
33
Buffer Type
DIMM
50MHz
EXINTN0
EXINTN1
EXINTN2
CDCC GA
R
(SL4C=12mA)
EXCSN1
DIMM
(SL4C=12mA)
100
EXCSN0
(2)2BANK of X8 SDRAM
SDRAM
[23-1]
0
ROM0
LAN
(SL4C=17mA)
Main
ASIC
CSROMN0
R
ROM1
39
33
CDCC_REQn
22
(SL4C=24mA)
CDCC_DATA
[7-1]
Main
ASIC
LAN:8mA
8mA
R
22
R
(note)
1bank :SDCLK2=NC
2BANK of X16 SDRAM
DATA[7-0]
CDCCCLK
0
R
DIMM
22
(SL4C=6mA)
CSROMN1
0
DIMM
Pin name
33MHz
DQM[7-0]
TDOPAC33NN18
6mA
10
SDCSN2
I/O Buffer (3.3V) Schmitt in 3mA
DIMM
Main
ASIC
R
R
0
33
Output Buffer (3.3V) 3mA
SDCASN
Main
ASIC
SDRAM
IORDN
22
2BANK of X16 SDRAM
R
TDBIAC33UN12
DIMM Buffer
(SL4C=13mA)
TDBIAC33UN03
DIMM
(3)2BANK of X16 SDRAM
DIMMD[63-0]
SDCSN0
33
(SL4C=09mA)
[24-1]
(a)SDRAM
Pin name
Buffer Type
BA[1-0]
IOWRN
Buffer Type
(1)1BANK of X16 SDRAM
(c)CDCC I/F
SDRAM
SDRASN
TDBIAC33NN03S
Pin name
R
Main
ASIC
TDBIAC33NN03S
100MHz
(3)2BANK of X16 SDRAM
10
Pin name
Buffer Type
TOPOLOGY
LAN
MA[12-0]
SDCSN1
TDBIAC33NN09
DIMM
(SL4C=6mA)
Output Buffer (3.3V) 12mA
0
SDRAM
ROM1
25MHz
(3)2BANK of X16 SDRAM
0
(b)Local BUS
LAN
Main
ASIC
R
SDRAM
Main
ASIC
I/O Buffer(3.3V)3mA, 50k Pull-up
5MHz
33
(SL4C=6mA)
33
Output Buffer (3.3V) 12mA
Pin name
0
TDOPAC33NN12
Main
ASIC
LAN
I/O Buffer(3.3V)3mA, 50k Pull-up
CDCC_INTn
Main
ASIC
Main
ASIC
Buffer Type
Buffer Type
R
R
Buffer Type
R
0
LAN
R
R
ROM0
5MHz
Pin name
Pin name
Main
ASIC
R
Main
ASIC
(SL4C:3mA)
R
R
Main
ASIC
R
TDOPAC33NN12
(SL4C=12mA)
Main
ASIC
TDBIAC33NN03S
R
(2)1BANK of X16 SDRAM
100MHz
ROM0
TDBIAC33UN03
10
50MHz
Pin name
R
Buffer Type
R
TDBIAC33NN03S
33MHz
Main
ASIC
Pin name
DIMM
33MHz
(2)2BANK of X8 SDRAM
50MHz
2BANK of X8 SDRAM
I/O Buffer(3.3V)12mA, 50k Pull-up
50MHz
Main
ASIC
DIMM
0
I/O Buffer (3.3V) Schmitt in 3mA
Main
ASIC
I/O Buffer (3.3V) Schmitt in 3mA
(SL4C:3mA)
DIMM Buffer
R
SDCKE
Buffer Type
SDCLK0
DIMM
(SL4C=6mA)
5MHz
Pin name
Main
ASIC
TDBIAC33UN03
Main
ASIC
R
SDRAM
ROM0
(1)1BANK of X16 SDRAM
100MHz
Output Buffer (3.3V) 12mA
(4)2BANK of X8 SDRAM
8mA
TDOPAC33NN12
DIMM
Buffer Type
25MHz
Pin name
Buffer Type
CDCC GA
R
33
Main
ASIC
22
R
50MHz
SDRAM
22
R
50MHz
R
Main
ASIC
33
SDRAM
50MHz
SDRAM
2233
RR
Main
ASIC
75
R
Main
ASIC
R
22 75
50MHz
SDRAM
R
SDRAM
Main
ASIC 50MHz
RR
22 75
R
33
R
2233
Main
ASIC
R
39
SDRAM
R
50MHz
Main
ASIC
R
33
R
39
50MHz
SDRAM
R
22
R
47
ROM1
ROM1
(1)DIMM NOT INSTALLED
DIMM INSTALLED
(1)DIMM NOT INSTALLED
DIMM INSTALLED
(1)DIMM NOT INSTALLED
DIMM INSTALLED
NAME
CODE
CIR B512246 (6/6)
LM9444-001