Pin Assignments; Pin List Sorted By Signal Name - Compaq 21264 Hardware Reference Manual

Pin Assignments

Table 3–3 21264/EV67 Signal Descriptions by Function (Continued)
Signal
Reset_L
SromClk_H
SromData_H
SromOE_L
Tck_H
Tdi_H
Tdo_H
TestStat_H
Tms_H
Trst_L
3.3 Pin Assignments
The 21264/EV67 package has 587 pins aligned in a pin grid array (PGA) design. There
are 380 functional signal pins, 1 dedicated 3.3-V pin for the PLL, 112 ground VSS pins,
and 94 VDD pins. Table 3–4 lists the signal pins and their corresponding pin grid array
(PGA) locations in alphabetical order for the signal type. Table 3–5 lists the pin grid
array locations in alphabetical order
Table 3–4 Pin List Sorted by Signal Name
Signal Name PGA Location Signal Name
BcAdd_H_10 B30
BcAdd_H_13 H28
BcAdd_H_16 E31
BcAdd_H_19 A35
BcAdd_H_22 C35
BcAdd_H_5 E27
BcAdd_H_8 C29
BcCheck_H_1 AB4
BcCheck_H_12 E45
BcCheck_H_15 BB36
BcCheck_H_4 M38
BcCheck_H_7 BC37
BcData_H_0 B10
BcData_H_100 D42
BcData_H_103 H42
Hardware Interface
3–8
Type Count Description
I_DA 1 System reset. This signal protects the 21264/EV67 from dam-
age during initial power-up. It must be asserted until
DCOK_H is asserted. After that, it is deasserted and the
21264/EV67 begins its reset sequence.
O_OD_TP 1 Serial ROM clock.
I_DA 1 Serial ROM data.
O_OD_TP 1 Serial ROM enable.
I_DA 1 IEEE 1149.1 test clock.
I_DA 1 IEEE 1149.1 test data-in signal.
O_OD_TP 1 IEEE 1149.1 test data-out signal.
O_OD_TP 1 Test status pin.
I_DA 1 IEEE 1149.1 test mode select signal.
I_DA 1 IEEE 1149.1 test access port (TAP) reset signal.
BcAdd_H_11
BcAdd_H_14
BcAdd_H_17
BcAdd_H_20
BcAdd_H_23
BcAdd_H_6
BcAdd_H_9
BcCheck_H_10
BcCheck_H_13
BcCheck_H_2
BcCheck_H_5
BcCheck_H_8
BcData_H_1
BcData_H_101
BcData_H_104
PGA Location Signal Name
D30 BcAdd_H_12
G29 BcAdd_H_15
D32 BcAdd_H_18
B36 BcAdd_H_21
E33 BcAdd_H_4
A29 BcAdd_H_7
F28 BcCheck_H_0
AW1 BcCheck_H_11
AC45 BcCheck_H_14
AT2 BcCheck_H_3
AB42 BcCheck_H_6
M8 BcCheck_H_9
D10 BcData_H_10
D44 BcData_H_102
G45 BcData_H_105
Alpha 21264/EV67 Hardware Reference Manual
PGA Location
C31
A33
B34
H30
B28
G27
F2
BD10
AT44
BC11
AU43
AA3
L3
H40
L43