Service manual

Schematic Diagrams
B - 4
Schematic Diags
CPU Northwood & Prescott (2 of 2)
Sheet 3 of 39
CPU Northwood &
Prescott
(2 of 2)
VCORE
VCORE
VCORE
VCORE
VDD3
VCORE
VCCVID
VDD3
TMS
TCK
TDI
TRST#
HCPURST#
HIT#
DBR#
THERMTRIP#_ICH
TDO
TCK
BNR#
HLOCK#
FSA
CPUPWRGD
THERMDA
HTRDY#
FERR#VCCCA
RSP#
DEFER#
HDBI0#
INTR
THERMDC
INIT#
FSB
VCCIOPLL
A20M#
IGNNE#
PROCHOT#
HSTPCLK#
IERR#
HCPURST#
TDI
HDRDY#
HGTLREF
HDBI3#
BPRI#
COMP_1
TMS
HDBI2# BR0#
SMI#
TRST#
HDBI1#
HITM#
DBSY#
BINIT#VSSA
ADS#
MCERR#
NMI
TCK
HCPURST#
TPWR
TDO
VCCVID
VID_PWRGD
IERR#
CPUPWRGD
PROCHOT#
BR0#
FERR#
CPUSLP#
THERMTRIP#
COMP_0
THERMDC
TMP_SMDATA
TMP_SMCLK
THERMDA
DBR#
TDI
TMS
TRST#
TDO
R106 0
12
T49
T21
T27
T4
T3
T12
T20
T23
T26
T46
T243
T48
T47 R102 47
C524
220P
12
C470
220P
12
C518
1U_0805_X7R
12
R380
169_1%
12
C526
220P
12
C474
220P
12
C59
1U_0805_X7R
12
L51 4.7UH(0805)1 2
R330 61.9_1%12
+
C476 10U(0805)1 2
R44 200_1%1 2
R103 27.4_1%12
R100 68012
R333 6212
R99 39.2_1%12
R104 15012
R97 61.9_1%12
T45
T29
T30
T28
T22
L49
4.7UH(0805)
1 2
+
C444 10U(0805)1 2
T41
T8
T11
T24
T14
U17
ADM1032ARM
8
7
6
54
3
2
1
SCLK
SDATA
ALERT#
GNDTHERM#
D-
D+
VDD
R399 0(R)
C537 2200P
R400 20K
C546
0.1U
R96 1.5K_1%
R101 5112
C538
0.1U
T13
D10
SCS751(R)
AC
R69 10K
R92 6212
R5 300_1%12
R105 12012
R98 20012
R383 62_1%12
U16B
NORTHWOOD478
AC1
V5
A5
AC26
AD26
AE25
L5
R5
P1
E5
D1
F6 F20 AA6 AA21
W23
P23
J23
F21
W22
R22
K22
E22
AF23
AF22
AC3
V6
B6
Y4
AA3
W5
AB2
H5
H2
J6
G1
G4
H6
G2
F3
E3
D2
E2
D4
C1
F7
E6
D5
B3
C4
A2
C3
B2
B5
C6
AB26
AB23
AB25
A4
V21
P26
G25
E21
C25 C5 C7 C9 D10 D12 D14 D16 D18 D20 D21 D24 D3 D6 D8
AE23
AD20
AD22
K24 K3 K6 L1 L23 L26 L4 M2 M22 M25 M5 N21 N24 N3 N6 P2 P22 P25 P5
E13
E15
E17
E19
E23
E26
E4
E7
E9
F10
F12
F14
F16
F18
F2
F22
F25
F5
J2 J22 J25 J5 K21 R1 R23
T6
U2
U22
U25
U5
V1
V23
V26
V4
W21
W24
W3
W6
Y2
Y22
Y25
Y5
G6 R26
E11
E1
F8
G21
G24
T3
T24
T21
G3
R4
AD6
AD5
L24
AF4
C22
A22
A7
AD2
AE21
AF3
AF24
AF25
B1
AP0
AP1
VCC_SENSE
ITP_CLK0
ITP_CLK1
DBRESET
ADSTB0
ADSTB1
COMP1
LINT1
LINT0
GTLREF3 GTLREF2 GTLREF1 GTLREF0
STBP3
STBP2
STBP1
STBP0
STBN3
STBN2
STBN1
STBN0
BCLK1
BCLK0
IERR
MCERR
FERR
STPCLK
BINIT
INIT
RSP
DBSY
DRDY
TRDY
ADS
LOCK
BR0
BNR
HIT
HITM
BPRI
DEFER
TCK
TDI
TMS
TRST
TDO
THERMDA
THERMDC
THERMTRIP
PROCHOT
IGNNE
SMI
A20M
SLP
PWRGOOD
RESET
VSS_SENSE
DB#3
DB#2
DB#1
DB#0
VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS
VCCIOPLL
VCCA
VSSA
VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS VSS VSS VSS VSS VSS VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
BSEL0
BSEL1
COMP0
VCCVID
VSS
RESERVED0
RESERVED1
VIDPWRGD
RESERVED4
RESERVED5/VCCVIDPRG
RESERVED6
RESERVED7
NC
R401
200
R68 0
VCORE [2,4,5,18,19,33]
VCC3S [2,5,9,10,11,12,16,17,18,19,20,23,25,26,27,28,31,32,37]
SMI# [18]
HIT# [6]
IGNNE# [18]
BR0# [6]
DBSY# [6]
HLOCK# [6]
FERR# [18]
FSA [5]
HDRDY# [6]
DEFER# [6]
HITM# [6]
INIT# [18]
A20M# [18]
FSB [5]
BPRI# [6]
HSTPCLK# [18]
HCPURST# [6]
ADS# [6]
HTRDY# [6]
CPUPWRGD [18]
HDBI1#[6]
ITPCLK#[5]
BNR# [6]
NMI[18]
HDSTBP0#[6]
HDSTBP2#[6]
HADSTB0#[6]
HDSTBP1#[6]
HADSTB1#[6]
HDSTBN0#[6]
HDBI3#[6]
HDSTBN3#[6]
HDBI0#[6]
ITPCLK[5]
HDSTBN1#[6]
HDBI2#[6]
HDSTBP3#[6]
HDSTBN2#[6]
CPUCLK#[5]
CPUCLK[5]
BPM0# [2]
BPM1# [2]
TPREQ# [2]
PROCHOT# [6]
THERMTRIP#_ICH [18]
VID_PWRGD [37]
DD_ON [18,28,34]
VSS_SENSE[33]
VCC_SENSE[33]
CPUSLP# [18]
INTR[18]
HGTLREF[6]
TMP_SMDATA [28]
TMP_SMCLK [28]
ATF_INT# [18,28]
DBR# [18]
TPRDY# [2]
ITPCLK [5]
ITPCLK# [5]
VDD3 [18,19,22,24,26,27,28,31,32,34]
GTLREF GENERATION CIRCUITS
12mil trace
VCCA route parallel and VSSA route
L should be close to c
Layout Note:
All test pin close
CLOSE TO CPU PIN
10 MILE
10 MILE