82801FB Datasheet, PDF (743/786 Pages) Intel Corporation – Intel I/O Controller Hub 6 (ICH6) Family

Electrical Characteristics
22.4 AC Characteristics
1
Table 22-9. Clock Timings (Sheet 1 of 2)
Sym
Parameter
Min Max Unit Figure Notes
t1 Period
t2 High Time
t3 Low Time
t4 Rise Time
t5 Fall Time
PCI Clock (PCICLK)
30
33.3
ns
22-1
12
ns
22-1
12
ns
22-1
–
3
ns
22-1
–
3
ns
22-1
14 MHz Clock (CLK14)
t6 Period
t7 High Time
67
70
ns
22-1
20
–
ns
22-1
t8 Low Time
20
–
ns
22-1
t41 Rising Edge Rate
t42 Falling Edge Rate
1.0
4.0
V/ns
1
1.0
4.0
V/ns
1
48 MHz Clock (CLK48)
fclk48 Operating Frequency
t9 Frequency Tolerance
48.000 –
MHz
2
–
100
ppm
t10 High Time
7
–
ns
22-1
t11 Low Time
7
–
ns
22-1
t12 Rise Time
–
1.2
ns
22-1
t13 Fall Time
–
1.2
ns
22-1
SMBus Clock (SMBCLK)
fsmb Operating Frequency
t18 High time
10
16
KHz
4.0
50
us
22-16
3
t19 Low time
4.7
–
us
22-16
t20 Rise time
–
1000
ns
22-16
t21 Fall time
–
300
ns
22-16
Intel^® I/O Controller Hub 6 (ICH6) Family Datasheet
743