ProASIC3 DC and Switching Characteristics
2- 66
v1.4
3.3 V PCI, 3.3 V PCI-X
Peripheral Component Interface for 3.3 V standard specifies support for 33 MHz and 66 MHz PCI
Bus applications.
AC loadings are defined per the PCI/PCI-X specifications for the datapath; Actel loadings for enable
AC loadings are defined per PCI/PCI-X specifications for the datapath; Actel loading for tristate is
Timing Characteristics
Table 2-86 Minimum and Maximum DC Input and Output Levels
3.3 V PCI/PCI-X
VIL
VIH
VOL
VOH
IOL IOH
IOSL
IOSH
IIL
IIH
Drive Strength
Min, V Max, V Min, V Max, V Max, V Min, V mA mA Max, mA1 Max, mA1 A2 A2
Per PCI specification
Per PCI curves
10
Notes:
1. Currents are measured at high temperature (100°C junction temperature) and maximum voltage.
2. Currents are measured at 85°C junction temperature.
Figure 2-10 AC Loading
Test Point
Enable Path
R to V
for t /t /t
CCI
LZ ZL
ZLS
10 pF for t
/t
/t /t
ZH ZHS
ZLS
ZL
5 pF for tHZ /tLZ
R to GND for t
/t
HZ
ZH
ZHS
R = 1 k
Test Point
Datapath
R = 25
R to VCCI for tDP (F)
R to GND for tDP (R)
Table 2-87 AC Waveforms, Measuring Points, and Capacitive Loads
Input LOW (V)
Input HIGH (V)
Measuring Point* (V)
CLOAD (pF)
0
3.3
0.285 * VCCI for tDP(R)
0.615 * VCCI for tDP(F)
10
Table 2-88 3.3 V PCI/PCI-X
Commercial-Case Conditions: TJ = 70°C, Worst-Case VCC = 1.425 V, Worst-Case VCCI = 3.0 V
Applicable to Advanced I/O Banks
Speed Grade
tDOUT
tDP
tDIN
tPY
tEOUT
tZL
tZH
tLZ
tHZ
tZLS
tZHS
Units
Std.
0.66
2.68
0.04
0.86
0.43
2.73
1.95
3.21
3.58
4.97
4.19
ns
–1
0.56
2.28
0.04
0.73
0.36
2.32
1.66
2.73
3.05
4.22
3.56
ns
–2
0.49
2.00
0.03
0.65
0.32
2.04
1.46
2.40
2.68
3.71
3.13
ns
Note: For specific junction temperature and voltage supply levels, refer to Table 2-6 on page 2-6 for derating values.
Table 2-89 3.3 V PCI/PCI-X
Commercial-Case Conditions: TJ = 70°C, Worst-Case VCC = 1.425 V, Worst-Case VCCI = 3.0 V
Applicable to Standard Plus I/O Banks
Speed Grade
tDOUT
tDP
tDIN
tPY
tEOUT
tZL
tZH
tLZ
tHZ
tZLS
tZHS
Units
Std.
0.66
2.31
0.04
0.85
0.43
2.35
1.70
2.79
3.22
4.59
3.94
ns
–1
0.56
1.96
0.04
0.72
0.36
2.00
1.45
2.37
2.74
3.90
3.35
ns
–2
0.49
1.72
0.03
0.64
0.32
1.76
1.27
2.08
2.41
3.42
2.94
ns
Note: For specific junction temperature and voltage supply levels, refer to Table 2-6 on page 2-6 for derating values.