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CY8C20x36/46/66, CY8C20396
Document Number: 001-12696 Rev. *D Page 12 of 34
48-Pin QFN
Table 6. Pin Definitions - CY8C20666 PSoC Device
[2, 3]
Pin
No.
Digital
Analog
Name Description
Figure 6. CY8C20666 PSoC Device
1 NC No connection
2 IO I P2[7]
3 IO I P2[5] Crystal output (XOut)
4 IO I P2[3] Crystal input (XIn)
5 IO I P2[1]
6 IO I P4[3]
7 IO IP4[1]
8 IO I P3[7]
9 IO I P3[5]
10 IO I P3[3]
11 IO I P3[1]
12 IOHR I P1[7] I2C SCL, SPI SS
13 IOHR I P1[5] I2C SDA, SPI MISO
14 NC No connection
15 NC No connection
16 IOHR I P1[3] SPI CLK
17 IOHR I P1[1] ISSP CLK
[1]
, I2C SCL, SPI MOSI
18 Power Vss Ground connection
19 IO D+
20 IO D-
21 Power Vdd Supply voltage
22 IOHR I P1[0] ISSP DATA
[1]
, I2C SDA, SPI CLK
23 IOHR I P1[2]
24 IOHR I P1[4] Optional external clock input
(EXTCLK)
25 IOHR I P1[6]
26 Input XRES Active high external reset with
internal pull down
27 IO I P3[0]
28 IO IP3[2]
29 IO IP3[4]
Pin
No.
Digital
Analog
Name Description
30 IO IP3[6] 40 IOH I P0[6]
31 IO I P4[0] 41 Power Vdd Supply voltage
32 IO I P4[2] 42 NC No connection
33 IO I P2[0] 43 NC No connection
34 IO I P2[2] 44 IOH I P0[7]
35 IO I P2[4] 45 IOH I P0[5]
36 IO I P2[6] 46 IOH I P0[3] Integrating input
37 IOH I P0[0] 47 Power Vss Ground connection
38 IOH I P0[2] 48 IOH I P0[1]
39 IOH I P0[4] CP Power Vss Center pad must be connected to ground
LEGEND A = Analog, I = Input, O = Output, NC = No Connection H = 5 mA High Output Drive, R = Regulated Output.
QFN
(Top View)
Vss
P0[3], AI
P0[5], AI
P0[7], AI
Vdd
P0[6], AI
P0[2], AI
P0[0], AI
10
11
12
AI, P2[7]
NC
AI, XOut, P2[5]
AI, XIn, P2[3]
AI, P2[1]
AI, P4[3]
AI, P4[1]
AI, P3[7]
AI, P3[5]
AI, P3[3]
AI, P3[1]
AI, I2C SCL, SPI SS, P1[7]
35
34
33
32
31
30
29
28
27
26
25
36
48
47
46
45
44
43
42
41
40
39
38
37
P2[4], AI
P2[2], AI
P2[0], AI
P4[2], AI
P4[0], AI
P3[6], AI
P3[4], AI
P3[2], AI
P3[0
], AI
XRES
P1[6], AI
P2[6], AI
1
2
3
4
5
6
7
8
9
13
14
15
16
17
18
19
20
21
22
23
24
I2C SDA, SPI MISO, A I, P1[5]
NC
SPI CLK, AI, P1[3]
AI, CLK
6
, I2C SCL, SPI MOSI, P1[1]
Vss
D+
D-
Vdd
AI, DATA
1
, I2C SDA, SPI CLK, P1[0]
AI, P1[2]
AI, EXTCLK, P1[4]
NC
NC
NC
P0[4], AI
P0[1], AI
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