IEI Integration ICE-DB-9S - Manual (Page 98)

Page 85
ICE Module
4.14.2.3 RTC
Q10,C234 and R304 are for the no battery solution. Using super CAP to instead of
Battery.
BT2
DCBAT_3V
+V3.3_DUAL
C235
0.22F Super Cap
2
1
CON3_HDR
JP9
3
2
1
+VBAT
C239
0.1U_4_Y_16V
C237
10U_8_X_6V3
R305 1K_4
R307
1K_4
JP9(1-2)
JUMP_1X2_2.54mm
Q11
BAT54C
SOT23_AAC
C
A1
A2
CLEAR CMOS/Super CAP
R304 1K_4
Q10
BAT54C
SOT23_AAC
C
A1
A2
BAT1
CR2032-HOLDER
Figure 4-45: RTC Reference Schematic