B.Sch
em
atic D
iag
rams
855PM MCH-1
Sheet 4 of 40
855PM MCH-1
+2.5V
+1.25VS
+1.5VS
+1.5VS
+1.5VS
+1.5VS
+2.5V
M_DATA[63:0]
9
M_CB[7:0]
9
M_DQS[8:0] 9
M_AA0
8,9
M_CS0#
8,9
M_CS2#
8,9
M_CS3#
8,9
M_BS0#
8,9
M_BS1#
8,9
M_RAS#
8,9
M_CAS#
8,9
M_WE#
8,9
M_CLK_DDR0 8
M_CLK_DDR0# 8
M_CLK_DDR1 8
M_CLK_DDR1# 8
M_CLK_DDR2 8
M_CLK_DDR2# 8
M_CLK_DDR3 8
M_CLK_DDR3# 8
M_CLK_DDR4 8
M_CLK_DDR4# 8
M_CLK_DDR5 8
M_CLK_DDR5# 8
M_CS1#
8,9
SM_VREF_DIMM 8
H_DPSLP# 3,11
H_DPWR# 3
M_CKE0
8,9
M_CKE3
8,9
M_CKE1
8,9
M_CKE2
8,9
CLK_MCH66
10
AGP_AD[0..31]
25
AGP_CBE#[0..3]
25
AGP_FRAME#
25
AGP_DEVSEL#
25
AGP_IRDY#
25
AGP_TRDY#
25
AGP_STOP#
25
AGP_PAR
25
AGP_GNT#
25
AGP_REQ#
25
AGP_ADSTB0
25
AGP_ADSTB1
25
AGP_ADSTB#1
25
AGP_ADSTB#0
25
AGP_SBSTB
25
AGP_SBSTB#
25
AGP_SBA0
25
AGP_SBA1
25
AGP_SBA3
25
AGP_SBA2
25
AGP_SBA7
25
AGP_SBA5
25
AGP_SBA6
25
AGP_SBA4
25
AGP_ST1
25
AGP_ST0
25
AGP_ST2
25
AGP_RBF#
25
AGP_WBF#
25
+1.5VS
4,7,11,13,25,32
+2.5V
7,8,11,34,35
+1.25VS
9,26,27,30,35
M_AA1
8,9
M_AA2
8,9
M_AA3
8,9
M_AA6
8,9
M_AA7
8,9
M_AA4
8,9
M_AA5
8,9
M_AA10
8,9
M_AA11
8,9
M_AA8
8,9
M_AA9
8,9
M_AA12
8,9
PCIRST#1 11,18,20,22,24,25,37
M_DQS0
M_DQS1
M_DQS2
M_DQS3
M_DQS4
M_DQS5
M_DQS6
M_DQS7
M_DQS8
M_AA0
M_AA1
M_AA2
M_AA4
M_AA5
M_AA6
M_AA7
M_AA8
M_AA9
M_AA10
M_AA11
M_AA12
TP_M_RCVI#
M_CB1
M_DATA1
M_DATA28
M_DATA47
M_DATA57
M_DATA60
M_DATA45
M_CB5
M_DATA10
M_DATA22
M_DATA61
M_DATA14
M_DATA29
M_DATA34
M_DATA43
M_CB0
M_CB4
M_DATA16
M_DATA40
M_DATA44
M_DATA3
M_DATA58
M_DATA8
M_DATA33
M_DATA55
M_DATA24
M_DATA50
M_CB6
M_DATA18
M_DATA32
M_DATA53
M_DATA0
M_DATA7
M_DATA9
M_DATA35
M_DATA25
M_DATA13
M_DATA12
M_DATA36
M_DATA39
M_DATA42
M_DATA59
M_CB3
M_DATA41
M_DATA23
M_DATA46
M_CB7
M_DATA2
M_DATA4
M_DATA17
M_DATA38
M_DATA15
M_DATA19
M_DATA20
M_DATA30
M_DATA5
M_DATA11
M_DATA31
M_DATA52
M_DATA54
M_DATA56
M_DATA6
M_DATA62
M_CB2
M_DATA27
M_DATA48
M_DATA51
M_DATA26
M_DATA37
M_DATA49
M_DATA21
M_DATA63
MCH_SMRCOMP
TP_M_RCVO#
SMVREF
Z0501
AGP_AD0
AGP_AD1
AGP_AD2
AGP_AD3
AGP_AD4
AGP_AD5
AGP_AD6
AGP_AD7
AGP_AD8
AGP_AD9
AGP_AD10
AGP_AD11
AGP_AD12
AGP_AD13
AGP_AD14
AGP_AD15
AGP_AD16
AGP_AD17
AGP_AD18
AGP_AD19
AGP_AD20
AGP_AD21
AGP_AD22
AGP_AD23
AGP_AD24
AGP_AD25
AGP_AD26
AGP_AD27
AGP_AD28
AGP_AD29
AGP_AD30
AGP_AD31
AGP_AD[0..31]
AGP_CBE#0
AGP_CBE#1
AGP_CBE#2
AGP_CBE#3
AGP_FRAME#
AGP_DEVSEL#
AGP_IRDY#
AGP_TRDY#
AGP_STOP#
AGP_PAR
AGP_REQ#
AGP_GNT#
AGP_CBE#[0..3]
GRCOMP
AGPREF
AGP_ST0
AGP_ST1
+2.5V
+1.5VS
+1.25VS
M_AA3
AGP_PIPE#
AGP_ST0
AGP_ST1
Z0502
Z0503
Z0504
Z0505
Z0506
Z0508
Z0507
Z0509
Z0510
Z0511
Z0512
Z0513
R341
1K(0402) 1%
R336
0(0402)
C515
.1u(0402)
C473
.1u(0402)
R345
4.7K(0402)
T
T
R354
*4.7K(0402)
C517
10PF
DDR SYSTEM MEMORY
UB1E
I855PM
G28
F27
C28
E28
H25
G27
F25
B28
E27
C27
B25
C25
B27
D27
D26
E25
D24
E23
C22
E21
C24
B23
D22
B21
C21
D20
C19
D18
C20
E19
C18
E17
E13
C12
B11
C10
B13
C13
C11
D10
E10
C9
D8
E8
E11
B9
B7
C7
C6
D6
D4
B3
E6
B5
C4
E4
C3
D3
F4
F3
B2
C2
E2
G4
C16
D16
B15
C14
B17
C17
C15
D14
J9
F26
C26
C23
B19
D12
C8
C5
E3
E15
E12
F17
E16
G17
G18
E18
F19
G20
G19
F21
F13
E20
G21
G23
E22
H23
F23
E9
F7
F9
E7
G12
G13
F11
G8
G11
J25
K25
G5
F5
G24
E24
G25
J24
G6
G7
K23
J23
G14
G15
J28
V8
Y8
J21
AD26
AD27
G22
J27
H27
H26
SDQ0
SDQ1
SDQ2
SDQ3
SDQ4
SDQ5
SDQ6
SDQ7
SDQ8
SDQ9
SDQ10
SDQ11
SDQ12
SDQ13
SDQ14
SDQ15
SDQ16
SDQ17
SDQ18
SDQ19
SDQ20
SDQ21
SDQ22
SDQ23
SDQ24
SDQ25
SDQ26
SDQ27
SDQ28
SDQ29
SDQ30
SDQ31
SDQ32
SDQ33
SDQ34
SDQ35
SDQ36
SDQ37
SDQ38
SDQ39
SDQ40
SDQ41
SDQ42
SDQ43
SDQ44
SDQ45
SDQ46
SDQ47
SDQ48
SDQ49
SDQ50
SDQ51
SDQ52
SDQ53
SDQ54
SDQ55
SDQ56
SDQ57
SDQ58
SDQ59
SDQ60
SDQ61
SDQ62
SDQ63
SDQ64
SDQ65
SDQ66
SDQ67
SDQ68
SDQ69
SDQ70
SDQ71
SMVREF
SDQS0
SDQS1
SDQS2
SDQS3
SDQS4
SDQS5
SDQS6
SDQS7
SDQS8
SMA_A0
SMA_A1
SMA_A2
SMA_A3
SMA_A4
SMA_A5
SMA_A6
SMA_A7
SMA_A8
SMA_A9
SMA_A10
SMA_A11
SMA_A12
SCKE0
SCKE1
SCKE2
SCKE3
SCS0#
SCS1#
SCS2#
SCS3#
SBA0
SBA1
SRAS#
SCAS#
SWE#
SCMDCLK0
SCMDCLK0#
SCMDCLK1
SCMDCLK1#
SCMDCLK2
SCMDCLK2#
SCMDCLK3
SCMDCLK3#
SCMDCLK4
SCMDCLK4#
SCMDCLK5
SCMDCLK5#
SRCVENOUT#
SRCVENIN#
SMRCOMP
DPSLP#
DPWR#
SMVREF
NC0
NC1
RSVD2
RSTIN#
RSVD1
TESTIN#
T
T
T
T
T
T
T
T
T
R327
*0(0402)
C548
.1u(0402)
AGP
UB1B
I855PM
R27
R28
T25
R25
T26
T27
U27
U28
V26
V27
T23
U23
T24
U24
U25
V24
Y27
Y26
AA28
AB25
AB27
AA27
AB26
Y23
AB23
AA24
AA25
AB24
AC25
AC24
AC22
AD24
V25
V23
Y25
AA23
Y24
W28
W27
W24
W23
W25
AG24
AH25
AD25
AA21
P22
R24
AC27
R23
AC28
AH28
AH27
AG28
AG27
AE28
AE27
AE24
AE25
AF27
AF26
AE22
AE23
AF22
AG25
AF24
AG26
G16
G10
G9
H7
H3
G3
G2
H4
G_AD0
G_AD1
G_AD2
G_AD3
G_AD4
G_AD5
G_AD6
G_AD7
G_AD8
G_AD9
G_AD10
G_AD11
G_AD12
G_AD13
G_AD14
G_AD15
G_AD16
G_AD17
G_AD18
G_AD19
G_AD20
G_AD21
G_AD22
G_AD23
G_AD24
G_AD25
G_AD26
G_AD27
G_AD28
G_AD29
G_AD30
G_AD31
G_CBE#0
G_CBE#1
G_CBE#2
G_CBE#3
G_FRAME#
G_DEVSEL#
G_IRDY#
G_TRDY#
G_STOP#
G_PAR
G_REQ#
G_GNT#
GRCOMP
AGPREF
66IN
AD_STB0
AD_STB1
AD_STB#0
AD_STB#1
SBA0
SBA1
SBA2
SBA3
SBA4
SBA5
SBA6
SBA7
SBSTB
SBSTB#
RBF#
WBF#
PIPE#
ST0
ST1
ST2
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
ETS#
R355
18_1%
R351
40.2_1%
R329
10K(0402) 1%
R328
10K(0402) 1%
R347
1K(0402)
R346
1K(0402)
R324
10K(0402)
R325
*0(0402)
C528
.1u(0402)
R342
1K(0402) 1%
10 MILS
CLOSED TO U6
11/10
2/24
TECHNICAL SERVICE MANUAL
Prestigio Nobile 158W
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