IEI Integration ICE-DB-T6 - Manual (Page 74)

Type 6 Carrier Board Design Guide
Page 64
3.12.2 Speaker/FAN Control/RTC Reference
3.12.2.1 Speaker Out
Buzzer
R325 2.7K_4
1 2
Q14
2N3904_SOT23
E
C
B
R321
33_4 +V5S_BUZZER
+V5
SP1
SATG1205NP45_DIP12X10_6.5
1
2
SPKR 3,18,21
C246
0.1U_4_Y_16V
Figure 3-29: Speaker Out Reference Schematic
3.12.2.2 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 3-30: RTC Reference Schematic