307013-003 Datasheet, PDF (80/848 Pages) Intel Corporation – Intel I/O Controller Hub 7

Intel^® ICH7 Pin States
Table 3-1.
Integrated Pull-Up and Pull-Down Resistors (Sheet 2 of 2)
Signal
SPI_ARB (Desktop and Mobile Only)
SPI_CLK (Desktop and Mobile Only)
SPKR
TP3
USB[7:0] [P,N]
Resistor
Pull-down
Pull-down
Pull-down
Pull-up
Pull-down
Nominal
20 kΩ
20 kΩ
20 kΩ
20 kΩ
15 kΩ
Notes
10
10
4
17
18
NOTES:
1.
The pull-down resistors on ACZ_BIT_CLK (AC ‘97) and ACZ_RST# are enabled when
either:
- The LSO bit (bit 3) in the AC ’97 Global Control Register (D30:F2:2C) is set to 1, or
- Both Function 2 and Function 3 of Device 30 are disabled.
Otherwise, the integrated Pull-down resistor is disabled.
2.
The AC ‘97/Intel High Definition Audio Link signals may either all be configured to be an
AC-Link or an Intel High Definition Audio Link.
3.
Simulation data shows that these resistor values can range from 10 kΩ to 20 kΩ.
4.
Simulation data shows that these resistor values can range from 9 kΩ to 50 kΩ.
5.
The pull-down resistors on ACZ_SYNC (AC ‘97) and ACZ_SDOUT (AC ‘97) are enabled
during reset and also enabled when either:
- The LSO bit (bit 3) in the AC ’97 Global Control Register (D30:F2:2C) is set to 1, or
- Both Function 2 and Function 3 of Device 30 are disabled.
Otherwise, the integrated Pull-down resistor is disabled.
6.
Simulation data shows that these resistor values can range from 10 kΩ to 40 kΩ.
7.
The pull-down on this signal (in Intel High Definition Audio mode) is only enabled when in
S3_COLD.
8.
Simulation data shows that these resistor values can range from 5.7 kΩ to 28.3 kΩ.
9.
The pull-up or pull-down on this signal is only enabled at boot/reset for strapping function.
10. Simulation data shows that these resistor values can range from 15 kΩ to 35 kΩ.
11. The pull-down on this signal is only enabled when LAN_RST# is asserted.
12. The internal pull-up is enabled only when the PCIRST# pin is driven low and the PWROK
indication is high.
13. Internal pull-up is enabled during RSMRST# and is disabled within 100 ms after RSMRST#
de-asserts.
14. Simulation data shows that these resistor values can range from 45 kΩ to 170 kΩ.
15. Simulation data shows that these resistor values can range from 15 kΩ to 30 kΩ.
16. Simulation data shows that these resistor values can range from 10 kΩ to 20 kΩ. The
internal pull-up is only enabled only during PLTRST# assertion.
17. Simulation data shows that these resistor values can range from 10 kW to 30 kW.
18. Simulation data shows that these resistor values can range from 14.25 kΩ to 24.8 kΩ
19. The internal pull-up is enabled only when PCIRST# is low.
3.2
IDE Integrated Series Termination Resistors
Table 3-2 shows the ICH7 IDE signals that have integrated series termination resistors.
Table 3-2. IDE Series Termination Resistors
Signal
DD[15:0], DIOW#, DIOR#, DREQ,
DDACK#, IORDY, DA[2:0], DCS1#,
DCS3#, IDEIRQ
Integrated Series Termination Resistor Value
approximately 33 Ω (See Note)
NOTE: Simulation data indicates that the integrated series termination resistors are a nominal
33 Ω but can range from 21 Ω to 75 Ω.
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Intel ^® ICH7 Family Datasheet