Intel 820E 사용자 설명서
Intel
®
820E Chipset
R
126
Design
Guide
Table 27. Hub Interface
Checklist Items
Recommendations
Reason/Effect
HL[11]
No pull-up resistor is required.
Use a no-stuff or a test point to put the
ICH2 into NAND chain mode testing.
ICH2 into NAND chain mode testing.
HL_COMP
Tie the COMP pin to a 40
Ω
, 1% or 2% (or
39
Ω
, 1%) pull-up resistor (to 1.8 V), via a
10 mil wide, very short (~0.5 inch) trace.
ZCOMP no longer supported.
Table 28. LAN Interface
Checklist Items
Recommendations
Reason/Effect
LAN_CLK
Connect to platform LAN connect device.
LAN_RXD[2:0]
Connect to LAN_RXD on platform LAN
connect device.
connect device.
ICH2 contains integrated 9K pull-up
resistors on interface
resistors on interface
LAN_TXD[2:0]
LAN_RSTSYNC
Connect to LAX_TXD on platform LAN
connect device.
connect device.
LAN connect interface can be left NC if not
used.
used.
Input buffers are terminated internally.
Table 29. EEPROM Interface
Checklist Items
Recommendations
Reason/Effect
EE_DOUT
Prototype boards should include a
placeholder for a pull-down resistor on this
signal line, but should not populate the
resistor. Connect to EE_DIN of EEPROM
or CNR connector.
placeholder for a pull-down resistor on this
signal line, but should not populate the
resistor. Connect to EE_DIN of EEPROM
or CNR connector.
Connected to EEPROM data input
signal. (Input from EEPROM perspective
and output from ICH2 perspective.)
signal. (Input from EEPROM perspective
and output from ICH2 perspective.)
EE_DIN
No extra circuitry is required. Connect to
EE_DOUT of EEPROM or CNR connector.
EE_DOUT of EEPROM or CNR connector.
ICH2 contains integrated pull-up resistor
for this signal.
for this signal.
Connected to EEPROM data output
signal. (Output from EEPROM
perspective and input from ICH2
perspective.)
signal. (Output from EEPROM
perspective and input from ICH2
perspective.)
Table 30. FWH Flash BIOS Interface
Checklist Items
Recommendations
Reason/Effect
FWH[3:0]
LAD[3:0]
LDRQ[1:0]
No extra pull-ups required. Connect
straight to FWH Flash BIOS.
straight to FWH Flash BIOS.
ICH2 Integrates 24 k
Ω
resistors on
these signal lines.