SI4840-DEMO Datasheet, PDF (18/22 Pages) Silicon Laboratories – Si4840/44 DEMO BOARD USERS GUIDE

Rev 0.1
18
Figure 6. Si4840/44 DEMO Board Rev. 1.3 Schematic – MCU Portion (1 of 2)
MHz
KHz
MHz
PM
SLEEP
FM
MW SW
LCD1
MCU
C40
0.1u
VCC
[1] SCLK
[1] RESET
[1] SDIO
[2] LCD_S12
[2] LCD_S11
[2] LCD_S10
[2] LCD_S9
[2] LCD_S8
[2] LCD_S7
[2] LCD_S6
SEG27/IOA4 ³³
SEG26/IOA3 ³²
SEG25/IOA2 ³¹
SEG24/IOA1 ³⁰
SEG23 ²⁹
SEG22 ²⁸
SEG21 ²⁷
SEG12(K12) ²⁶
SEG11(K11) ²⁵
SEG10(K10) ²⁴
SEG9(K9) ²³
1 _BAK
2 _XIN
3 _XOUT
4 _GND
5 _VDD1
6 _VDD2
7 _VDD3
8 _CUP1
9 _CUP2
10 _COM1
11 _COM2
C44
0.1u
C38
0.1u
C37
0.1u
VCC
LCD_C1 [2]
LCD_C2 [2]
C32
22p
Y2
32.768KHz
C35
22p
XTALI [1]
IRQ [1]
U3
S1
VCC
RESET
C42
0.1u
D1
Tuning indicator
R24
200R
Q3
2N3906
1M
R1
0.1u
C41
R2
1M
Si4840/44-DEMO