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

1NC No connection
2IO IP2[7]
3IO I P2[5] Crystal output (XOut)
4IO I P2[3] Crystal input (XIn)
5IO IP2[1]
6IO IP4[3]
7IO IP4[1]
8IO IP3[7]
9IO IP3[5]
10 IO IP3[3]
11 IO IP3[1]
12 IOHR IP1[7] I2C SCL, SPI SS
13 IOHR IP1[5] I2C SDA, SPI MISO
14 NC No connection
15 NC No connection
16 IOHR IP1[3] SPI CLK
17 IOHR IP1[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 IP1[0] ISSP DATA[1], I2C SDA, SPI CLK
23 IOHR IP1[2]
24 IOHR IP1[4] Optional external clock input
(EXTCLK)
25 IOHR IP1[6]
26 Input XRES Active high external reset with
internal pull down
27 IO IP3[0]
28 IO IP3[2]
29 IO IP3[4] Pin
No.
Digital
Analog
Name Description
30 IO IP3[6] 40 IOH IP0[6]
31 IO IP4[0] 41 Power Vdd Supply voltage
32 IO IP4[2] 42 NC No connection
33 IO IP2[0] 43 NC No connection
34 IO IP2[2] 44 IOH IP0[7]
35 IO IP2[4] 45 IOH IP0[5]
36 IO IP2[6] 46 IOH IP0[3] Integrating input
37 IOH IP0[0] 47 Power Vss Ground connection
38 IOH IP0[2] 48 IOH IP0[1]
39 IOH IP0[4] CP Power Vss Center pad must be connected to ground
LEGENDA = 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],A I
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, AI, P1[5]
NC
SPI CLK, AI, P1[3]
AI, CLK6, I2C SCL, SPI MOSI, P1[1]
Vss
D+
D-
Vdd
AI, DATA1, 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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