Datasheet

CY8C21634, CY8C21534, CY8C21434
CY8C21334, CY8C21234
Document Number: 38-12025 Rev. AB Page 12 of 53
Pin Definitions
CY8C21434/CY8C21634 32-pin QFN
[12]
Pin No.
Type
Name Description
Digital Analog
1 I/O I, M P0[1] Analog column mux input, integrating input
2 I/O MP2[7]
3 I/O MP2[5]
4 I/O M P2[3]
5 I/O M P2[1]
6 I/O M P3[3] In CY8C21434 part
6 Power SMP SMP connection to required external components in CY8C21634 part
7 I/O M P3[1] In CY8C21434 part
7 Power V
SS
Ground connection in CY8C21634 part
8 I/O M P1[7] I
2
C SCL
9 I/O M P1[5] I
2
C SDA
10 I/O M P1[3]
11 I/O M P1[1] I
2
C SCL, ISSP-SCLK
[13]
12 Power V
SS
Ground connection
13 I/O M P1[0] I
2
C SDA, ISSP-SDATA
[13]
14 I/O M P1[2]
15 I/O M P1[4] Optional external clock input (EXTCLK)
16 I/O M P1[6]
17 Input XRES Active high external reset with internal pull-down
18 I/O MP3[0]
19 I/O MP3[2]
20 I/O M P2[0]
21 I/O M P2[2]
22 I/O M P2[4]
23 I/O M P2[6]
24 I/O I, M P0[0] Analog column mux input
25 I/O I, M P0[2] Analog column mux input
26 I/O I, M P0[4] Analog column mux input
27 I/O I, M P0[6] Analog column mux input
28 Power V
DD
Supply voltage
29 I/O I, M P0[7] Analog column mux input
30 I/O I, M P0[5] Analog column mux input
31 I/O I, M P0[3] Analog column mux input, integrating input
32 Power V
SS
Ground connection
LEGEND
A = Analog, I = Input, O = Output, and M = Analog Mux Input.
Notes
12. The center pad on the QFN package must be connected to ground (V
SS
) for best mechanical, thermal, and electrical performance. If not connected to ground, it
must be electrically floated and not connected to any other signal.
13. These are the ISSP pins, which are not high Z at POR. See the
PSoC Technical Reference Manual for details.