CY8C21634, CY8C21534, CY8C21434

CY8C21334, CY8C21234

Document Number: 38-12025 Rev. *Y

Page 8 of 50

Pin Information

The CY8C21x34 PSoC device is available in a variety of packages which are listed in the following tables. Every port pin (labeled with

Digital I/O.

16-pin Part Pinout

Figure 3. CY8C21234 16-pin PSoC Device

SOIC

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

M, I2C SCL, P1[1]

10

9

Pin Definitions

CY8C21234 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

Ground connection

7

I/O

M

P1[1]

8

Power

Ground connection

9

I/O

M

P1[0]

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

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.