82801DB Datasheet, PDF (526/587 Pages) Intel Corporation – Intel 82801DB I/O Controller Hub 4 (ICH4)

Electrical Characteristics
17.4 AC Characteristics
Table 17-7. AC Input Characteristics
Type
Signals
Undershoot INTRUDER#, PWROK, RTCRST#, RSMRST#
Rise/Fall Slew
Rate
INTRUDER#, PWROK, RSMRST#
Maximum
Voltage
–0.6 V
Pulse
Duration
20 ns
40 mV/µs
Notes
1
Table 17-8. Clock Timings (Sheet 1 of 2)
Sym
Parameter
Min Max Unit Notes Figure
t1 Period
t2 High Time
t3 Low Time
t4 Rise Time
t5 Fall Time
t6 Period
t7 High Time
t8 Low Time
fclk48
t9
t10
t11
t12
t13
Operating Frequency
Frequency Tolerance
High Time
Low Time
Rise Time
Fall Time
f_SUSclk
t14
t15
Operating Frequency
High Time
Low Time
fsmb
t18
t19
t20
t21
Operating Frequency
High time
Low time
Rise time
Fall time
PCI Clock (PCICLK)
30
12
12
Oscillator Clock (OSC)
67
20
20
USB Clock (USBCLK)
48
7
7
SUSCLK
32
10
10
SMBus Clock (SMBCLK)
10
4.0
4.7
33.3
3
3
70
500
1.2
1.2
16
50
1000
300
ns
ns
ns
ns
ns
ns
ns
MHz 1
ppm 2
ns
ns
ns
ns
kHz 6
us 6
us 6
KHz
us 3
us
ns
ns
17-1
17-1
17-1
17-1
17-1
17-1
17-1
17-1
17-1
17-1
17-1
17-1
17-17
17-17
17-17
17-17
526
Intel^® 82801DB ICH4 Datasheet