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PRELIMINARY
PSoC®3: CY8C38 Family Data Sheet
Document Number: 001-11729 Rev. *I
Page 7 of 100
Figure 2-3. 68-Pin QFN Part Pinout[3]
Notes
2. Pins are No Connect (NC) on devices without USB. NC means that the pin has no electrical connection. The pin can be left floating or tied to a supply voltage or ground.
3. The center pad on the QFN package should be connected to digital ground (Vssd) for best mechanical, thermal, and electrical performance. If not connected to ground,
it should be electrically floated and not connected to any other signal.
(GPIO) P2[6]
(GPIO) P2[7]
(I2C0: SCL, SIO) P12[4]
(I2C0: SDA, SIO) P12[5]
Vssb
Ind
Vboost
Vbat
Vssd
XRES
(TMS, SWDIO, GPIO) P1[0]
(TCK, SWDCK, GPIO) P1[1]
(configurable XRES, GPIO) P1[2]
(TDO, SWV, GPIO) P1[3]
(TDI, GPIO) P1[4]
(nTRST, GPIO) P1[5]
Vddio1
P0[3] (GPIO, OpAmp0-/Extref0)
P0[2] (GPIO, OpAmp0+)
P0[1] (GPIO, OpAmp0out)
P0[0] (GPIO, OpAmp2out)
P12[3] (SIO)
P12[2] (SIO)
Vssd
Vdda
Vssa
Vcca
P15[3] (GPIO, kHz XTAL: Xi)
P15[2] (GPIO, kHz XTAL: Xo)
P12[1] (SIO, I2C1: SDA)
P12[0] (SIO, 12C1: SCL)
P3[7] (GPIO, OpAmp3out)
P3[6] (GPIO, OpAmp1out)
Vddio3
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
10
11
12
13
14
15
16
17
1
2
3
4
5
6
7
8
9
QFN
(Top View)
Lines show Vddio
to IO supply
association
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