82801BA Datasheet, PDF (447/498 Pages) Intel Corporation – Intel 82801BA I/O Controller Hub 2 (ICH2) and Intel 82801BAM I/O Controller Hub 2 Mobile

Electrical Characteristics
16.4 A.C. Characteristics
Table 16-7. Clock Timings
Sym
Parameter
PCI Clock (PCICLK)
t1
Period
t2
High Time
t3
Low Time
t4
Rise Time
t5
Fall Time
Oscillator Clock (OSC)
t6
Period
t7
High Time
t8
Low time
USB Clock (USBCLK)
fclk48
t9
t10
t11
t12
t13
Operating Frequency
Frequency Tolerance
High Time
Low time
Rise Time
Fall Time
Suspend Clock (SUSCLK)
fsusclk
t14
t15
Operating Frequency
High time
Low Time
SMBus Clock (SMBCLK)
fsmb
t18
t19
t20
t21
Operating Frequency
High time
Low time
Rise time
Fall time
I/O APIC Clock (APICCLK)
fioap
t22
t23
t24
t25
Operating Frequency
High time
Low time
Rise time
Fall time
Min Max Unit Notes Figure
30 33.3
ns
12
ns
12
ns
3
ns
3
ns
67
70
ns
20
20
ns
48
MHz
2500 ppm 1
7
ns
7
ns
1.2
ns
1.2
ns
32
10
10
KHz 5
us 5
us 5
10
16
KHz
4.0
50
us 2
4.7
us
1000
ns
300
ns
14.32
12
12
1.0
1.0
33.33
36
36
5.0
5.0
MHz
ns
ns
ns
ns
16-2
16-2
16-2
16-2
16-2
16-2
16-2
16-2
16-2
16-2
16-2
16-2
16-2
16-2
16-17
16-17
16-17
16-17
16-2
16-2
16-2
16-2
82801BA ICH2 and 82801BAM ICH2-M Datasheet
16-7