SI4840-DEMO Datasheet, PDF (19/22 Pages) Silicon Laboratories – Si4840/44 DEMO BOARD USERS GUIDE

Si4840/44-DEMO
KEY_C0 [2]
KEY_C1 [2]
KEY_C2 [2]
KEY_C3 [2]
KEY_R0 [2]
KEY_R1 [2]
S7
UP/VOL+
S8
DOWN/VOL-
S9
MONO/ST
S10
SETTING
S3
POWER/BAND
S4
DE/SPC
S5
BASS/TMR
S6
TREBLE/AL
KEY
SETTING MENU:
1 BAND TOP
2 BAND BOTTOM
3 BLEND MONO
4 BLEND STEREO
5 BLEND SEPARATION
6 TONE/VOL MODE
7 Tuning preference
a Bass/Treble MODE
b Dig-Vol MODE
c MIX MODE1
d MIX MODE2
a preference1
b preference2
c preference3
d preference4
VCC
C2
0.1u
R13
22R
C3
220u/4V
D6
BZ1
1N4148
R4
BZ [2]
1k
Q2
2N3904
BUZZER
Figure 7. Si4840/44 DEMO Board Rev. 1.3 Schematic – MCU Portion (2 of 2)
Rev 0.1
19