Specifications
CY8C24123A
CY8C24223A
CY8C24423A
Document Number: 38-12028 Rev. *V Page 13 of 71
32-Pin Part Pinout
Table 5. 32-Pin QFN
[7]
Pin No.
Type
Pin
Name
Description
Figure 7. CY8C24423A 32-Pin PSoC Device
Digital Analog
1 I/O P2[7]
2 I/O P2[5]
3 I/O I P2[3] Direct switched capacitor block input
4 I/O I P2[1] Direct switched capacitor block input
5 Power V
SS
Ground connection
6 Power SMP SMP connection to external components
required
7 I/O P1[7] I
2
C SCL
8 I/O P1[5] I
2
C SDA
9 NC No connection. Pin must be left floating
10 I/O P1[3]
11 I/O P1[1] XTALin, I
2
C SCL, ISSP-SCLK
[8]
12 Power V
SS
Ground Connection
13 I/O P1[0] XTALout, I
2
C SDA, ISSP-SDATA
[8]
14 I/O P1[2]
15 I/O P1[4] Optional EXTCLK
16 NC No connection. Pin must be left floating
17 I/O P1[6]
18 Input XRES Active high external reset with internal
pull-down
19 I/O I P2[0] Direct switched capacitor block input
20 I/O I P2[2] Direct switched capacitor block input
21 I/O P2[4] External AGND
22 I/O P2[6] External V
REF
23 I/O I P0[0] Analog column mux input
24 I/O I P0[2] Analog column mux input
25 NC No connection. Pin must be left floating
26 I/O I P0[4] Analog column mux input
27 I/O I P0[6] Analog column mux input
28 Power V
DD
Supply voltage
29 I/O I P0[7] Analog column mux input
30 I/O I/O P0[5] Analog column mux input and column
output
31 I/O I/O P0[3] Analog column mux input and column
output
32 I/O I P0[1] Analog column mux input
LEGEND: A = Analog, I = Input, and O = Output.
P2[7]
P2[5]
A, I, P2[3]
A, I, P2[1]
V
SS
SMP
QFN
(Top View)
9
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
24
23
22
21
20
19
18
17
32
31
30
29
28
27
26
25
P0[1], A, I
P0[3], A, IO
P0[5], A, IO
P0[7], A, I
V
DD
P0[6], A, I
P0[4], A, I
NC
I2C SCL, P1[7]
I2C SDA, P1[5]
P0[2], A, I
P0[0], A, I
XRES
P1[6]
NC
P1[3]
I2C SCL, XTALin, P1[1]
V
SS
I2C SDA, XTALout, P1[0]
P1[2]
EXTCLK, P1[4]
NC
P2[6], External VRef
P2[4], External AGND
P2[2], A, I
P2[0], A, I
Notes
7. 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.
8. These are the ISSP pins, which are not high Z at POR. See the PSoC Technical Reference Manual for details.