PIN DESCRIPTION (Continued)

I/O PORT

Name

Function

Alternate Function

Pin Assignment

Port.bit

9291J

9291N

P3.4

I/O

14

19

P3.5

I/O

13

18

P3.6

I/O

12

17

P3.7

I/O

-

16

P4.0

PWM0

O

PWM Output 0

28

35

P4.1

PWM1

O

PWM Output 1

29

36

P4.2

PWM2

O

PWM Output 2

30

37

P4.3

PWM3

O

PWM Output 3

31

38

P4.4

PWM4

O

PWM Output 4

32

39

P4.5

PWM5

O

PWM Output 5

33

40

P4.6

PWM6

O

PWM Output 6

34

41

P4.7

PWM7

O

PWM Output 7

35

42

P4.7

EXTRG

I

A/D External Trigger

35

42

P5.0

SCK

O

SPI Serial Clock

(1)

20

27

P5.0

INT2

I

External Interrupt 2

(1)

20

27

P5.1

SDIO

I/O

SPI Serial Data Input/Output

(1 )

19

26

P5.2

I/O

-

25

P5.3

I/O

-

24

Notes.

1. The alternate functions of SCK/INT2 and SDIO may be swapped by using the SWAP Register Function.

2. Schmitt trigger options are available as a mask option for any input pin.

Table 1. ST9291 I/O Port Alternative Function Summary (Continued)

®

ST9291

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