CY8C21345, CY8C21645

CY8C22345, CY8C22345H, CY8C22645

Document Number: 001-55397 Rev. *I

Page 8 of 36

Pinouts

The automotive CY8C21x45 and CY8C22x45 PSoC devices are available in a variety of packages which are listed and illustrated in

the following tables. Every port pin (labeled with a “P”) is capable of digital I/O and connection to the common analog mux bus.

28-Pin Part Pinout

Table 2. 28-Pin Part Pinout (SSOP)

Pin

No.

Type

Pin Name

Description

Digital

Analog

Figure 3. CY8C21345, CY8C22345, and CY8C22345H

28-Pin PSoC Device

1

I/O

I, MR

P0[7]

capacitor pin

2

I/O

I, ML

P0[5]

capacitor pin

3

I/O

I, ML

P0[3]

Analog column mux input

4

I/O

I, ML

P0[1]

Analog column mux input

5

I/O

I, ML

P2[7]

Direct input to analog block

6

I/O

ML

P2[5]

Optional SAR ADC external reference

(EXTREF)

7

I/O

ML

P2[3]

8

I/O

ML

P2[1]

9

Power

Ground connection

10

I/O

ML

P1[7]

11

I/O

ML

P1[5]

12

I/O

ML

P1[3]

13

I/O

ML

P1[1]

14

Power

Ground Connection

15

I/O

MR

P1[0]

16

I/O

MR

P1[2]

17

I/O

MR

P1[4]

Optional external clock input (EXTCLK)

18

I/O

MR

P1[6]

19

Input

XRES

Active high external reset with internal

pull-down

20

I/O

MR

P2[0]

21

I/O

MR

P2[2]

22

I/O

MR

P2[4]

23

I/O

I, MR

P2[6]

Direct input to analog block

24

I/O

I, MR

P0[0]

Analog column mux input

25

I/O

I, MR

P0[2]

Analog column mux input

26

I/O

I, MR

P0[4]

Analog column mux input

27

I/O

I, MR

P0[6]

Analog column mux input

28

Power

Supply voltage

LEGEND: A = Analog, I = Input, O = Output, MR= Right analog mux bus input, ML= Left analog mux bus input.

SSOP

1

AI, MR, P0[7]

AI, ML, P0[5]

AI, ML, P0[3]

AI, ML, P0[1]

AI, ML, P2[7]

EXTREF, ML, P2[5]

ML, P2[3]

ML, P2[1]

I2C SCL, ML, P1[7]

I2C SDA, ML, P1[5]

ML, P1[3]

XTALin, I2C SCL, ML, P1[1]

2

3

4

5

6

7

8

9

10

11

12

13

14

28

27

26

25

24

23

22

21

20

19

18

17

16

15

P0[6], MR, AI

P0[4], MR, AI

P0[2], MR, AI

P0[0], MR, AI

P2[6], MR, AI

P2[4], MR

P2[2], MR

P2[0], MR

XRES

P1[6], MR

P1[4], MR, EXTCLK

P1[2], MR

P1[0], MR, I2C SDA, XTALout

Note

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