NH82801HBM S LB9A Intel, NH82801HBM S LB9A Datasheet - Page 90

• Manufacturer Part Number: NH82801HBM S LB9A
• Description: CONTROLLER HUB, ICH8M, I/O, 82801HBM
• Manufacturer: Intel

Specifications of NH82801HBM S LB9A

• Power Dissipation Pd: 2.4W
• Digital Ic Case Style: BGA
• No. Of Pins: 676
• Pci Bus Type: I/O Controller Hub
• Pci Express Base Spec: PCIe 1.1
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

2.26.2
Figure 3.
90
External RTC Circuitry
To reduce RTC well power consumption, the ICH8 implements an internal oscillator
circuit that is sensitive to step voltage changes in VccRTC.
schematic recommended to ensure correct operation of the ICH8 RTC.
Example External RTC Circuit
NOTE: C1 and C2 depend on crystal load.
VccSus3_3
Vbatt
1 KΩ
+
–
Schottky
(20% tolerance)
Diodes
20 KΩ
1 µF
32.768 kHz
Xtal
1 µF
(20% tolerance)
(5% tolerance)
§ §
15 pF
C1
(5% tolerance)
15 pF
C2
Figure 3
Intel
®
shows an example
10 MΩ
ICH8 Family Datasheet
R1
Signal Description
VCCRTC
RTCX1
RTCX2
RTCRST#