PAW3212DB-TJDT Datasheet, PDF (8/31 Pages) Pixart Imaging Inc. – ULTRA LOW POWER WIRELESS MOUSE SENSOR

PAW3212DB-TJDT
5. Reference Circuit Schematics
The reference circuit below is an example for a wireless red LED based mouse application with single AA or AAA battery, a DC/DC
output at 2.7V and a Nordic RF IC as a host controller. This example is designed based on the High Voltage Segment configuration
(2.1V ~ 3.6V).
Power
BAT
VCC_BAT
BAT+
BAT+1
11
BAT-1
11
L4 22uH
BAT
C14
47uF
R4
TBD
SW1
BAT
VCC_BAT
3
2
1
R6
TBD
VCC_DC = Vref * (1 + R_FB1/R_FB2)
Vref, typ = 1.3V
R4~R6 for low power detection
Power Tree
U3 HT77S10/
LX
7
2
4
LX OUT
/SHDN
LBI /LBO
FB
REF
8
5
3
1
C16
0.1uF/
VCC_DC
R5 R_FB1
TBD 220K
R_FB2
200K
Battery * 1
(0.9V~1.6V)
DC/DC
(2.7V)
Sensor, LED,
RF (2.7V)
Sensor - PAW3212
S-NCS
S-MOTSWK
S-SDIO
S-SCLK
U2
1 _NCS
2 _MOTSWK
3 _SDIO
4 _SCLK
8
VDDA
VDD ⁷
VSS ⁶
LED ⁵
PAW3212
C1
4.7uF
D1 R LED
VCC_DC=2.7V
VCC_DC
C2
+
10uF
C3
0.1uF
R1 10
Buttons
Z_CM
ENSW
1
3
Z2
COM
Z1 ²
ENCODER
VCC_DC
R0_Z2 1M
Z2
R0_Z1 1M
Z1
CPI_SW
R0
1
2
CPI_SW
B4
BL
1
2
B4
B5
BL
1
2
B5
BM
R0
1
2
BM
BR
R0
1
2
BR
BL
R0
1
2
BL
RF - Nordic nRF24LE1
C12 22pF
2
1
C13 22pF
2
1
XC2
X1
4
1
GND OUT
IN GND
3
2
16 MHz Cry stal
XC1
U3
ISSP Program - Nordic
VCC_DC
C11
0.1uF
R2 22K
1
2
VCC_DC
PROG
B4
BL
J1
1
2
3
4
5
6
7
8
9
10
HEADER 5X2
ISSP
CPI_SW
RESET
B5
50 ohm point
VCC_DC
C9
0.1uF
C7
0.1uF
C8
33nF
Z1
Z2
PROG
R0
1
2
3
P0.1
VDD
VDD
VSS
24
23
22
4 ^DEC1
ANT2 ₂₁
5
6
7
8
DEC2
P0.2
nRF24LE1
ANT1
VDD_PA
PROG
RESET
P0.3
P1.4
VSS
P1.3
20
19
18
17
RESET
S-SCLK
BM
1
L1
6.8nH
1
L3
2
4.7nH
L2
2
6.8nH
C5
1
2
1.5pF
C6
1.0pF
C20
1.8pF
R8
/
VCC_DC
C10
33nF
C4
C19
2.2nF
/
Figure 8. One Battery Application with DC/DC Output at 2.7V
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PAW3212DB-TJDT-DS-R1.2-19112014
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