Specifications

Intel
®
810E2 Chipset Platform
R
76 Design Guide
Figure 42. Diode Circuit to Connect RTC External Battery
VCC3_3SBY
VccRTC
1.0 µF
1 k
Ω
RTC_ext_batt_diode_cir
c
-
+
A standby power supply should be used in a desktop system, to provide continuous power to the RTC
when available, which will significantly increase the RTC battery life and thereby the RTC accuracy.
3.20.5. RTC External RTCRST Circuit
Figure 43. RTCRST External Circuit for Intel
®
ICH2 RTC
VCC3_3SBY
Vcc RTC
1.0 µF
1 k
Ω
2.2 µF
8.2 k
Ω
RTCRST#
RTCRST
circuit
Diode /
battery circuit
RTC_RTCRESET_ext_circ