www.ti.com

TUSB3210

Universal Serial Bus

General-Purpose Device Controller

SLLS466F – FEBRUARY 2001 – REVISED AUGUST 2007

Table 1-1. Terminal Functions (continued)

TERMINAL

I/O

DESCRIPTION

NAME

NO.

P2.[0:7]

22, 23,

I/O

General-purpose I/O port 2 bits 0–7, Schmitt-trigger input, 100-

25, 26,

27, 28,

29, 30

P3.0/S0/RXD

58

I/O

P3.0: General-purpose I/O port 3 bit 0, Schmitt-trigger input, 100-

S0: See Section 2.6.5.

RXD: Can be used as a UART interface

P3.1/S1/TXD

57

I/O

P3.1: General-purpose I/O port 3 bit 1, Schmitt-trigger input, 100-

S1: See Section 2.6.5.

TXD: Can be used as a UART interface

P3.2

56

I/O

General-purpose I/O port 3 bit 2, Schmitt-trigger input, 100-

only used internally (see Section 2.9.4)

P3.3

55

I/O

General-purpose I/O port 3 bit 3, Schmitt-trigger input, 100-

support INT1 input, depending on configuration (see Figure 2-5)

P3.[4:7]

54, 53,

I/O

General-purpose I/O port 3 bits 4–7, Schmitt-trigger input, 100-

52, 51

PUR

17

O

Pullup resistor connection pin (3-state) push-pull CMOS output (

±4 mA)

RST

13

I

Controller master reset signal, Schmitt-trigger input, 100-

μA active pullup

RSV

1, 4

Reserved (Do not connect these pins.)

S2

8

I

General-purpose input, can be used for VID/PID selection under firmware control. This input has no

internal pullup; therefore, it must be driven/pulled either low or high and cannot be left unconnected.

S3

9

I

General-purpose input. This input has no internal pullup; therefore, it must be driven/pulled either low or

high and cannot be left unconnected.

SCL

12

O

SDA

11

I/O

SUSP

16

O

Suspend status signal: suspended (HIGH); unsuspended (LOW)

14

I

Test input0, Schmitt-trigger input, 100-

μA active pullup

15

I

Test input1, Schmitt-trigger input, 100-

μA active pullup

TEST2

20

I

Test input2, Schmitt-trigger input, 100-

μA active pullup. This pin is reserved for testing purposes and

should be left unconnected.

VCC

10, 39,

—

Power supply input, 3.3 V typical

62

VREN

38

I

Voltage regulator enable: enable active-LOW; disable active-HIGH

X1

61

I

12-MHz crystal input

X2

60

O

12-MHz crystal output

(3)

The functions controlled by TEST0 and TEST1 are shown in Table 1-2. Because these pins have internal pullups, they can be left

unconnected for the default mode.

Table 1-2. Test0/Test1 Functions

TEST0

TEST1

Function

0

0

Selects 48-MHz clock input (from an oscillator or other onboard clock source)

0

1

Reserved for testing purposes

1

0

Reserved for testing purposes

1

1

Selects 12-MHz crystal as clock source (default)

Introduction

10

Submit Documentation Feedback