Sdram - Brother HL-6050 Service Manual

CHAPTER 3 THEORY OF OPERATION
1.3.7

SDRAM

A 256Mbit SDRAM (x 16bit) is used as the RAM.
SDCSN0
ADR[17]
1-6A/3-1E/3-3C/3-4D/1C/1E/6B
ADR[18]
1-6A/3-1E/3-3C/3-4D/1C/1E/6B
ADR[19]
1-6A/3-1E/3-3C/3-4D/1C/1E/6B
ADR[20]
1-6A/3-1E/3-3C/3-4D/1C/1E/6B
ADR[21]
1-6A/3-1E/3-3C/3-4D/1C/1E/6B
SDCLK0
SDCKE0
ADR[15]
1-6A/3-1D/3-1E/3-4D/1C/1E/6B
ADR[16]
1-6A/3-1D/3-1E/3-4D/1C/1E/6B
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[23-1]
1-6A/3-1E/3-3C/3-4D/1E/6B/1A/3-1D
SDRAM
U2
19 1
CS VDD1
1-5C 18 14
RASN
RAS VDD14
17 27
CASN
CAS VDD27
16 3
WEN
WE VDDQ3
9
VDDQ9
15 43
DQM0
LDQM VDDQ43
39 49
DQM1
UDQM VDDQ49
38 28
CLK VSS28
1-5C 37 41
CKE VSS41
1-5C
54
VSS54
20 6
BA0
BA0 VSSQ6
21 12
BA1
BA1 VSSQ12
46
VSSQ46
52
VSSQ52
2
DATA_S[0]
DQ0
4
DATA_S[1]
DQ1
23 5
DATA_S[2]
A0 DQ2
24 7
DATA_S[3]
A1 DQ3
25 8
DATA_S[4]
A2 DQ4
26 10
DATA_S[5]
A3 DQ5
29 11
DATA_S[6]
A4 DQ6
30 13
DATA_S[7]
A5 DQ7
31 42
DATA_S[8]
A6 DQ8
32 44
DATA_S[9]
A7 DQ9
33 45
DATA_S[10]
A8 DQ10
34 47
DATA_S[11]
A9 DQ11
22 48
DATA_S[12]
A10/AP DQ12
35 50
DATA_S[13]
A11 DQ13
36 51
DATA_S[14]
A12 DQ14
40 53
DATA_S[15]
TP50 NC DQ15
K4S561632
256bit
DATA_S[15-0]
3-6C/7C/6-1C
Fig. 3-9
3-8
VDD3
0V