Compaq 21264 Hardware Reference Manual page 248

AC Characteristics
Table 9–13 AC Specifications (Continued)
Signal Name Type
BcTagShared_H B_DA_PP
BcTagValid_H B_DA_PP
BcTagValid_H B_DA_PP
BcTagDirty_H B_DA_PP
BcTagShared_H B_DA_PP
BcTagParity_H B_DA_PP
BcTagOE_L O_PP
BcTagWr_L O_PP
BcTagInClk_H I_DA
BcTagOutClk_x O_PP
IRQ_H[5:0] I_DA
12
Reset_L I_DA
13
DCOK_H I_DA
14
PllBypass_H I_DA
15
ClkIn_x I_DA_CLK
17
FrameClk_x I_DA_CLK ClkIn_x
18
EV6Clk_x O_PP_CLK ClkIn_x
19
EV6Clk_x
ClkFwdRst_H I_DA
SromData_H I_DA
SromOE_L O_OD
20
SromClk_H O_OD
Tms_H I_DA
21
Trst_L I_DA
Tdi_H I_DA
Tdo_H O_OD
Tck_H I_DA
TestStat_H O_OD
1
The TSU specified for all clock-forwarded signal groups is with respect to the associated clock.
2
The TDH specified for all clock-forwarded signal groups is with respect to the associated clock.
3
The TSkew value applies only when the SYS_CLK_DELAY[0:1] entry in the Cbox WRITE_ONCE
chain (Table 5–24) is set to zero phases of delay between forwarded clock out and address/data.
4
The TSkew specified for SysData_L signals is only with respect to the associated clock.
5
These signals should be referenced to BcTagOutClk_x when measuring TSkew, provided that
BcTagOutClkl_x and BcDataOutClk_x have no programmed offset.
Electrical Data
9–8
Reference Signal
BcTagInClk_H
BcTagInClk_H
BcTagOutClk_x
NA
EV6Clk_x
DCOK_H
Cycle Compression Specification: See Note 19
FrameClk_x
SromClk_H
EV6Clk_x
EV6Clk_x
Tck_H
Tck_H
Tck_H
Tck_H
IEEE 1149.1 Port Freq. = 5.0
MHz Max.
EV6Clk_x
Alpha 21264/EV67 Hardware Reference Manual
1 2
TSU TDH TSkew Duty Cycle
400 ps 400 ps NA NA
400 ps 400 ps NA NA
6
NA NA ± 300 ps 45-55%
38-63%
40-60%
NA NA NA 45-55%
NA NA ± 400 ps
11 11
10 ns 10 ns NA NA
NA NA NA NA
NA NA NA NA
NA NA NA NA
NA NA NA 40–60%
400 ps 400 ps NA NA
NA NA ±1.0 ns YDiv±5%
400 ps 400 ps NA NA
2.0 ns 2.0 ns NA
NA NA ± 2.0 ns
NA NA ± 7.0 ns
2.0 ns 2.0 ns NA NA
NA NA NA NA
2.0 ns 2.0 ns NA NA
NA NA ± 7.0 ns NA
NA NA NA 45-55%
NA NA ± 4.0 ns NA
TSlew
1.0 V/ns
1.0 V/ns
NA
8
NA
9
NA
100 mV/ns
100 mV/ns
100 mV/ns
100 mV/ns
16
1.0 V/ns
1.0 V/ns
NA
1.0 V/ns
100 mV/ns
100 mV/ns
100 mV/ns
100 mV/ns
NA
100 mV/ns
NA