Schematic

1
1
2
2
3
3
4
4
D D
C C
B B
A A
Title
Number RevisionSize
A4
Date: 2011-5-12 Sheet of
File: C:\Documents and Settings\..\MPR121 V1.1.SchDocDrawn By:
IRQ
1
SCL
2
SDA
3
ADDR
4
VREG
5
VSS
6
REXT
7
ELE0
8
ELE1
9
ELE2
10
ELE3
11
ELE4/LED0
12
ELE5/LED1
13
ELE6/LED2
14
ELE7/LED3
15
ELE8/LED4
16
ELE9/LED5
17
ELE10/LED6
18
ELE11/LED7
19
VDD
20
U2
MPR121
0.1uF
C4
1
2
3
4
5
6
7
8
9
10
11
12
P3
Header 12
1
2
3
4
5
6
P2
Header 6
75K 1%
R7
GND
4.2K
R1
CT0
CT1
CT2
CT3
CT4
CT5
CT6
CT7
CT8
CT9
CT10
CT11
10uF
C1
1
2
P1
Header 2
VCC
GND
XC6206
Vin Vout
Gnd
U1
Q1
BSS138
SDA
SCL
IRQ
ADDR
4.2K
R2
VIN
1uF
C2
0.1uF
C3
VIN
4.2K
R4
Q2
BSS138
4.2K
R5
VCC
4.2K
R6
4.2K
R3 IRQ
ADDR
GND