LM3S9997 Datasheet, PDF(1102/1218 Page) Texas Instruments – Stellaris® LM3S9997 Microcontroller

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LM3S9997 Datasheet, PDF (1102/1218 Pages) Texas Instruments – Stellaris® LM3S9997 Microcontroller

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Signal Tables

Table 25-4. Signals by Function, Except for GPIO (continued)

Function

Pin Name Pin Number Pin Type Buffer Typea

Description

USB

USB0DM

70

I/O

Analog Bidirectional differential data pin (D- per USB

specification).

USB0DP

71

I/O

Analog Bidirectional differential data pin (D+ per USB

specification).

USB0EPEN

19

24

34

72

83

O

TTL

Optionally used in Host mode to control an external

power source to supply power to the USB bus.

USB0ID

66

I

Analog This signal senses the state of the USB ID signal.

The USB PHY enables an integrated pull-up, and

an external element (USB connector) indicates the

initial state of the USB controller (pulled down is

the A side of the cable and pulled up is the B side).

USB0PFLT

22

23

35

65

74

76

87

I

TTL

Optionally used in Host mode by an external power

source to indicate an error state by that power

source.

USB0RBIAS

73

O

Analog 9.1-kÎ© resistor (1% precision) used internally for

USB analog circuitry.

USB0VBUS

67

I/O

Analog This signal is used during the session request

protocol. This signal allows the USB PHY to both

sense the voltage level of VBUS, and pull up VBUS

momentarily during VBUS pulsing.

a. The TTL designation indicates the pin has TTL-compatible voltage levels.

Table 25-5. GPIO Pins and Alternate Functions

IO Pin Analog

Digital Function (GPIOPCTL PMCx Bit Field Encoding)a

Function

1

2

3

4

5

6

7

8

9

10

11

PA0 26

-

U0Rx

-

-

-

-

-

- I2C1SCL U1Rx

-

-

PA1 27

-

U0Tx

-

-

-

-

-

- I2C1SDA U1Tx

-

-

PA2 28

- SSI0Clk -

-

PWM4

-

-

-

- I2S0RXSD -

-

PA3 29

- SSI0Fss -

-

PWM5

-

-

-

-

I2S0RXMCLK

-

-

PA4 30

-

SSI0Rx

-

-

-

CAN0Rx

-

-

-

I2S0TXSCK

-

-

PA5 31

-

SSI0Tx

-

-

-

CAN0Tx

-

-

- I2S0TXWS -

-

PA6 34

- I2C1SCL CCP1

-

PWM0 PWM4 CAN0Rx

- USB0EPEN U1CTS

-

-

PA7 35

- I2C1SDA CCP4

-

PWM1 PWM5 CAN0Tx CCP3 USB0PFLT U1DCD

-

-

PB0 66 USB0ID CCP0 PWM2

-

-

U1Rx

-

-

-

-

-

-

PB1 67 USB0VBUS CCP2 PWM3

-

CCP1 U1Tx

-

-

-

-

-

-

PB2 72

- I2C0SCL IDX0

-

CCP3 CCP0

-

- USB0EPEN -

-

-

PB3 65

- I2C0SDA Fault0

-

Fault3

-

-

- USB0PFLT -

-

-

PB4 92 AIN10

-

-

-

U2Rx CAN0Rx IDX0 U1Rx

-

-

-

-

C0-

PB5 91 AIN11

C0o

CCP5 CCP6 CCP0 CAN0Tx CCP2 U1Tx

-

-

-

-

C1-

1102

Texas Instruments-Advance Information

June 15, 2010

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