Datasheet
CY8C21x34B
Document Number: 001-67345 Rev. *E Page 9 of 49
Pin Information
The CY8C21x34B PSoC device is available in a variety of packages which are listed in the following tables. Every port pin (labeled
with a “P”) is capable of Digital I/O and connection to the common analog bus. However, V
SS
, V
DD
, SMP, and XRES are not capable
of Digital I/O.
16-Pin Part Pinout
Figure 4. CY8C21234B 16-Pin PSoC Device
SOIC
V
DD
P0[6], A, I, M
P0[4], A, I, M
P0[2], A, I, M
P0[0], A, I, M
P1[4], EXTCLK, M
P1[2], M
P1[0], I2C SDA, M
16
15
14
13
12
11
1
2
3
4
5
6
7
8
A, I, M, P0[7]
A, I, M, P0[5]
A, I, M, P0[3]
A, I, M, P0[1]
SMP
V
SS
M, I2C SCL, P1[1]
V
SS
10
9
Table 2. Pin Definitions – CY8C21234B 16-Pin (SOIC)
Pin No.
Type
Name Description
Digital Analog
1 I/O I, M P0[7] Analog column mux input
2 I/O I, M P0[5] Analog column mux input
3 I/O I, M P0[3] Analog column mux input, integrating input
4 I/O I, M P0[1] Analog column mux input, integrating input
5 Power SMP Switch-mode pump (SMP) connection to required external components
6 Power V
SS
Ground connection
7 I/O M P1[1] I
2
C serial clock (SCL), ISSP-SCLK
[3]
8 Power V
SS
Ground connection
9 I/O M P1[0] I
2
C serial data (SDA), ISSP-SDATA
[3]
10 I/O M P1[2]
11 I/O M P1[4] Optional external clock input (EXTCLK)
12 I/O I, M P0[0] Analog column mux input
13 I/O I, M P0[2] Analog column mux input
14 I/O I, M P0[4] Analog column mux input
15 I/O I, M P0[6] Analog column mux input
16 Power V
DD
Supply voltage
LEGEND A = Analog, I = Input, O = Output, and M = Analog Mux Input.
Note
3. These are the ISSP pins, which are not High Z at POR. See the PSoC Technical Reference Manual for details.