CY8C27143, CY8C27243

CY8C27443, CY8C27543

CY8C27643

Document Number: 38-12012 Rev. *T

Page 9 of 63

Pinouts

The CY8C27x43 PSoC device is available in a variety of packages which are listed and illustrated in the following tables. Every port

8-pin Part Pinout

20-pin Part Pinout

Note

3. These are the ISSP pins, which are not High Z at POR (Power On Reset). See the PSoC Programmable System-on-Chip Technical Reference Manual for details.

Table 2. Pin Definitions – 8-pin PDIP

Pin

No.

Type

Pin

Name

Description

Figure 3. CY8C27143 8-pin PSoC Device

Digital

Analog

1

I/O

I/O

P0[5]

Analog column mux input and column output

2

I/O

I/O

P0[3]

Analog column mux input and column output

3

I/O

P1[1]

ISSP-SCLK[3]

4

Power

Vss

Ground connection.

5

I/O

P1[0]

ISSP-SDATA[3]

6

I/O

I/O

P0[2]

Analog column mux input and column output

7

I/O

I/O

P0[4]

Analog column mux input and column output

8

Power

Supply voltage

LEGEND: A = Analog, I = Input, and O = Output.

PDIP

1

2

3

4

A, IO, P0[5]

A, IO, P0[3]

I2CSCL, XTALin, P1[1]

8

7

6

5

P0[4], A, IO

P0[2], A, IO

P1[0], XTALout, I2CSDA

Table 3. Pin Definitions – 20-pin SSOP, SOIC

Pin

No.

Type

Pin

Name

Description

Figure 4. CY8C27243 20-pin PSoC Device

Digital

Analog

1

I/O

I

P0[7]

Analog column mux input

2

I/O

I/O

P0[5]

Analog column mux input and column output

3

I/O

I/O

P0[3]

Analog column mux input and column output

4

I/O

I

P0[1]

Analog column mux input

5

Power

SMP

Switch Mode Pump (SMP) connection to external

components required

6

I/O

P1[7]

7

I/O

P1[5]

8

I/O

P1[3]

9

I/O

P1[1]

10

Power

Vss

Ground connection.

11

I/O

P1[0]

12

I/O

P1[2]

13

I/O

P1[4]

Optional external clock input (EXTCLK)

14

I/O

P1[6]

15

Input

XRES

Active high external reset with internal pull down

16

I/O

I

P0[0]

Analog column mux input

17

I/O

I/O

P0[2]

Analog column mux input and column output

18

I/O

I/O

P0[4]

Analog column mux input and column output

19

I/O

I

P0[6]

Analog column mux input

20

Power

Supply voltage

LEGEND: A = Analog, I = Input, and O = Output.

SSOP

SOIC

P0[6], A, I

P0[4], A, IO

P0[2], A, IO

P0[0], A, I

XRES

P1[6]

P1[4], EXTCLK

P1[2]

P1[0], XTALout, I2C

SDA

20

19

18

17

16

15

14

13

12

11

1

2

3

4

5

6

7

8

9

10

A, I, P0[7]

A, IO, P0[5]

A, IO, P0[3]

A, I, P0[1]

SMP

I2CSCL, P1[7]

I2CSDA, P1[5]

P1[3]

I2CSCL, XTALin, P1[1]

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