Intel Pentium 4 Processor 478-Pin Socket (mPGA478) Design Guidelines

Intel® Pentium® 4 Processor 478-Pin Socket (mPGA478)
R
22
Table 4-3. Socket Positions Daisy Chained
Chain
No.
Socket Positions Daisy
Chained
# of
pins/chain
DC Endpoints
at Socket
Edge Finger:
Hi
Edge Finger: Low
Hi Low +I +V -I -V
1
A13-A14, A15-A16, A17-A18,
A19-A20, A21-A22, A23-A24
12 A13 A26 A125 A126 A101 A102
2
B14-B15, B16-B17, B18-B19,
B20-B21, B22-B23, B24-B25
14 B13 B26 A123 A124 A99 A100
3
C14-C15, C16-C17, C18-C19,
C20-C21, C22-C23, C24-C25
14 C13 C26 A121 A122 A97 A98
4
D14-D15, D16-D17, D18-D19,
D20-D21, D22-D23, D24-D25
14 D13 D26 A119 A120 A95 A96
5
E14-E15, E16-E17, E18-E19,
E20-E21, E22-E23, E24-E25
14 E13 E26 A117 A118 A93 A94
6
F14-F15, F16-F17, F18-F19,
F20-F21, F22-F23, F24-F25
14 F13 F26 A115 A116 A91 A92
7
H21-J21, K21-L21, M21-N21,
P21-R21, T21-U21, V21-W21
14 G21 Y21 A113 A114 A89 A90
8
H22-J22, K22-L22, M22-N22,
P22-R22, T22-U22, V22-W22
14 G22 Y22 A111 A112 A87 A88
9
H23-J23, K23-L23, M23-N23,
P23-R23, T23-U23, V23-W23
14 G23 Y23 A109 A110 A85 A86
10
H24-J24, K24-L24, M24-N24,
P24-R24, T24-U24, V24-W24
14 G24 Y24 A107 A108 A83 A84
11
H25-J25, K25-L25, M25-N25,
P25-R25, T25-U25, V25-W25
14 G25 Y25 A105 A106 A81 A82
12
H26-J26, K26-L26, M26-N26,
P26-R26, T26-U26, V26-W26
14 G26 Y26 A103 A104 A79 A80
13 NOT USED A51 A52 A77 A78
1
14 Pin Joint Resistance Circuit
1
not defined M1 P1 A49 A50 A75 A76
1
15 Pin Joint Resistance Circuit
1
not defined L6 N6 A47 A48 A73 A74
1
16 Pin Joint Resistance Circuit
1
not defined A26 A24 A45 A46 A71 A72
17 NOT USED A43 A44 A69 A70
1
18 Pin Joint Resistance Circuit
1
not defined AF24 AF26 A42 A68
1
19 Pin Joint Resistance Circuit
1
not defined AF1 AF3 A40 A66
20
AA14-AA15, AA16-AA17, AA18-
AA19, AA20-AA21, AA22-AA23,
AA24-AA25
14 AA13 AA26 A37 A38 A63 A64
21
AB14-AB15, AB16-AB17, AB18-
AB19, AB20-AB21, AB22-AB23,
AB24-AB25
14 AB13 AB26 A35 A36 A61 A62
22
AC14-AC15, AC16-AC17,
AC18-AC19, AC20-AC21,
AC22-AC23, AC24-AC25
14 AC13 AC26 A33 A34 A59 A60