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LOUIS

L.O.U.I.S - LOW COST USB ISDN SOLUTION

STMicroelectronics 

ST5481

3.1 - Pin List

Pin

Name

Type

Function

1

DM

I/O

Negative USB differential data line

2

DP

I/O

Positive USB differential data line

3

GNDBUS

I

USB remote ground

4

VREGD1

I/O

Digital input/ output regulated supply, is an input when RPSM is tied to a logic

zero value

5

VBUS

I

USB remote positive supply 5 volts.

6

VREGA

I/O

3.3V input/ output analog regulated supply, is an input when RPSM is tied to a

logic zero value

7

GNDA

I

Analog ground

8

RPSM

I

REMOTE POWER SUPPLY MODE: when tied to a logic zero value the device

is self powered

9

MODE0

I

Static configuration pin. Used for working modes and test modes programming

10

MODE1

I

Static configuration pin. Used for working modes and test modes programming

11

MODE2

I

Static configuration pin. Used for working modes and test modes programming

12

MODE3

I

Static configuration pin. Used for working modes and test modes programming

13

LIP

In analog Receive AMI signal differential positive inputs from the S line

14

LIN

In analog Receive AMI signal differential negative input from the S line

15

IREF

In analog External current reference (connected to an external resistor)

16

LON

Out analog Transmit AMI signal differential negative output to the S line

17

LOP

Out analog Transmit AMI signal differential positive output to the S line

18

TEST13 Out analog Analog test pin: AOPTEST1

19

TEST12 Out analog Analog test pin: AOPTEST2

20

TEST11

I/O

Test pin

21

TEST10

I/O

Test pin

22

TEST9

I/O

Test pin

23

TEST8

I/O

Test pin

24

TEST7

I/O

Test pin

25

TEST6

I/O

Test pin

26

TEST5

I/O

Test pin

27

TEST4

I/O

Test pin

28

TEST3

I/O

Test pin

29 ID3_TEST2

I/O

Either ID product bit 2 for USB descriptor either test pin

30 ID2_TEST1

I/O

Either ID product bit 3 for USB descriptor either test pin

31 ID1_TEST14

I

Either ID product bit 1 for USB descriptor either test pin

32 ID0_TEST15

I

Either ID product bit 0 for USB descriptor either test pin

33

NRESET

I

Initialisation input pin, zero active.

34

VREGD2

I

Digital input supply, must be connected to VREGD1

3/18

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