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ISP1130

Universal Serial Bus compound hub with integrated keyboard controller

Philips Electronics 

Philips Semiconductors

ISP1130

USB compound hub with keyboard controller

Table 2: Pin description (SSOP56 and SDIP56)…continued

Symbol [1]

Pin

Type Description

MX2

20

I

keyboard matrix return line (5 V tolerant, open drain) [2]

MX3/SCL

21

I/O pin function is controlled via the I2C0CON register (see

Table 76):

ENS1 = 0 — keyboard matrix return line (5 V tolerant,

open drain) [2]

ENS1 = 1 — I2C-bus clock output (5 V tolerant, open

drain) [2]

MX4/SDA

22

I/O pin function is controlled via the I2C0CON register (see

Table 76):

ENS1 = 0 — keyboard matrix return line (5 V tolerant,

open drain) [2]

ENS1 = 1 — bidirectional I2C-bus data line (5 V tolerant,

open drain) [2]

MX5

23

I

keyboard matrix return line(5 V tolerant, open drain) [2]

MX6

24

I

keyboard matrix return line (5 V tolerant, open drain) [2]

MX7

25

I

keyboard matrix return line (5 V tolerant, open drain) [2]

MY0

26

I/O

bidirectional keyboard matrix scan line (5 V tolerant) [3]

MY1

27

I/O

bidirectional keyboard matrix scan line (5 V tolerant) [3]

MY2

28

I/O

bidirectional keyboard matrix scan line (5 V tolerant) [3]

GND

29

-

ground supply

Vreg(3.3)

30

-

regulated supply voltage (3.3 V ± 10%) from internal

regulator; used to supply external devices

MY3

31

I/O

bidirectional keyboard matrix scan line (5 V tolerant) [3]

MY4

32

I/O

bidirectional keyboard matrix scan line (5 V tolerant) [3]

MY5

33

I/O

bidirectional keyboard matrix scan line (5 V tolerant) [3]

MY6

34

I/O

bidirectional keyboard matrix scan line (5 V tolerant) [3]

MY7

35

I/O

bidirectional keyboard matrix scan line (5 V tolerant) [3]

MY8

36

I/O

bidirectional keyboard matrix scan line (5 V tolerant) [3]

MY9

37

I/O

bidirectional keyboard matrix scan line (5 V tolerant) [3]

MY10

38

I/O

bidirectional keyboard matrix scan line (5 V tolerant) [3]

MY11

39

I/O

bidirectional keyboard matrix scan line (5 V tolerant) [3]

MY12

40

I/O

bidirectional keyboard matrix scan line (5 V tolerant) [3]

MY13

41

I/O

bidirectional keyboard matrix scan line (5 V tolerant) [3]

MY14

42

I/O

bidirectional keyboard matrix scan line (5 V tolerant) [3]

MY15

43

I/O

bidirectional keyboard matrix scan line (5 V tolerant) [3]

MY16/RD

44

I/O

bidirectional keyboard matrix scan line (5 V tolerant) [3];

used as read strobe when accessing external memory

MY17/WR

45

I/O

bidirectional keyboard matrix scan line (5 V tolerant) [3];

used as write strobe when accessing external memory

GND

46

-

ground supply

9397 750 06895

Objective specification

Rev. 01 — 23 March 2000

© Philips Electronics N.V. 2000. All rights reserved.

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