Cypress PSoC 5 FIRSTTOUCH CY8CKIT-014, Manual

Page: 25 / 44

CY8CKIT-014 PSoC 5 FirstTouch Starter Kit Guide, Spec. # 001-57708 Rev. ** 25
Example Projects
Temperature is calculated by referring to a table of 165 known points on the resistance/temperature
curve using a look up table. The table holds resistance values of the thermistor from -40 C to 125 C,
in 1 C increments. Linear interpolation is used between the points in the table for temperature
calculation up to two decimal places.
The temperature is then displayed as a rasterized image using persistence of vision when the board
is waved around. Refer to section
4.1.6 How the PSoC Rocks and PSoC Rocks SAR ADC Projects
Work on page 17 to understand how the message is displayed on the LEDs.
For more information on using PSoC family devices with a thermistor, refer to the application note
AN2017 "Sensing - A Thermistor-Based Thermometer, PSoC Style".
4.3.2 PCB Schematic
Figure 4-15. PCB Schematic for Temperature Sensing Project
P2_0
P4_3
P4_2
P4_1
P4_0
P2_3
P2_2
P2_1
ACC_ENABLE
P4_0
SWDCK
P2_1
XOU
T
P2_3
ZOUT
SWV
P4_1
P4_3
LOW
BAT
T
P4_2
SWDIO
ST
/M
OD
E
MO
DE
/XRES
P2_0 P2_2
YOUT
MODE
ACC_ENABLE
ST/MODE
ZOUT
YOUT
XOUT
T_SENSE
T_POWER
T
_
SEN
SE
T_
P
O
WE
R
3.3V
3.3V
3.3V
3.3V
0402 DNI
C29
NOLOAD
0402 DNI
C29
NOLOAD
FRAME
S1
SW PUSHBUTTON
FRAME
S1
SW PUSHBUTTON
1A
2A 1B
2B
3
0402
R17
68 ohm
0402
R17
68 ohm 1 2
0603
D1
LED RED
0603
D1
LED RED
2 1
0402
C1
0.1 uFd
0402
C1
0.1 uFd
0603
D5
LED RED
0603
D5
LED RED
2 1
0402
R18
68 ohm
0402
R18
68 ohm 1 2
U1
KXSC7-2050
U1
KXSC7-2050
VD
D
1
MODE
2
ST/MOT
3
ENABLE
4
X
5
Y
6
Z
7
GN
D
8
0603
R6
10K
1%
0603
R6
10K
1%
0402
R19
68 ohm
0402
R19
68 ohm 1 2
0402 DNI
C30
NOLOAD
0402 DNI
C30
NOLOAD
0603
D7
LED RED
0603
D7
LED RED
2 1
25
RT1
10K 25
RT1
10K
0603
D2
LED RED
0603
D2
LED RED
2 1
U2
CY8C5588AXI-060 TQFP100
U2
CY8C5588AXI-060 TQFP100
P2_5
1
P2_6
2
P2_7
3
P12_4 I2C0_SCL, SIO
4
P12_5 I2C0_SDA, SIO
5
P6_4
6
P6_5
7
P6_6
8
P6_7
9
VSSb
10
Ind
11
Vboost
12
Vbat
13
VSSd
14
XRES
15
P5_0
16
P5_1
17
P5_2
18
P5_3
19
P1_0
20
P1_1
21
P1_2
22
P1_3
23
P1_4
24
P1_5
25
V
DDi
o1
26
P
1_6
27
P
1_7
28
P
12_6_S
IO
29
P
12_7_S
IO
30
P
5_4
31
P
5_5
32
P
5_6
33
P
5_7
34
P
15_6 DP
35
P
15_7 DM
36
V
DDd
37
VSSd
38
V
CCd
39
NC1
40
NC2
41
P
15_0
42
P
15_1
43
P
3_0
44
P
3_1
45
P
3_2
46
P
3_3
47
P
3_4
48
P
3_5
49
V
DDi
o3
50
VDDio0
75
P0_3
74
P0_2
73
P0_1
72
P0_0
71
P4_1
70
P4_0
69
SIO_P12_3
68
SIO_P12_2
67
VSSd
66
VDDa
65
VSSa
64
VCCa
63
NC8
62
NC7
61
NC6
60
NC5
59
NC4
58
NC3
57
P15_3
56
P15_2
55
SIO, I2C1_SDA P12_1
54
SIO, I2C1_SCL P12_0
53
P3_7
52
P3_6
51
P
2_4
99
P
2_3
98
P
2_2
97
P
2_1
96
P
2_0
95
P
15_5
94
P
15_4
93
P
6_3
92
P
6_2
91
P
6_1
90
P
6_0
89
V
DDd
88
VSSd
87
V
CCd
86
P
4_7
85
P
4_6
84
P
4_5
83
P
4_4
82
P
4_3
81
P
4_2
80
P
0_7
79
P
0_6
78
P
0_5
77
P
0_4
76
V
DDi
o2
100
0603
D4
LED RED
0603
D4
LED RED
2 1
0402
R7
68 ohm
0402
R7
68 ohm 1 2
0603
D6
LED RED
0603
D6
LED RED
2 1
0402 DNI
C25
NOLOAD
0402 DNI
C25
NOLOAD
0402
R10
68 ohm
0402
R10
68 ohm 1 2
0402
R2
68 ohm
0402
R2
68 ohm 1 2
0603
R20
1K
0603
R20
1K
0402
R13
68 ohm
0402
R13
68 ohm 1 2
0402
R35
1.5K
0402
R35
1.5K
1
2
0603
D8
LED RED
0603
D8
LED RED
2 1
0402
R16
68 ohm
0402
R16
68 ohm 1 2
0603
D3
LED RED
0603
D3
LED RED
2 1