Texas Instruments SM320C6455-EP manual AEA14, AEA13, AEA12, AEA11, AEA8, AEA6, AEA5, Rgmii

Models: SM320C6455-EP

1 254
Download 254 pages 49.23 Kb
Page 60
Image 60

SM320C6455-EP

FIXED-POINT DIGITAL SIGNAL PROCESSOR

www.ti.com

SPRS462B – SEPTEMBER 2007 – REVISED JANUARY 2008

Table 3-1. C6455 Device Configuration Pins (AEA[19:0], ABA[1:0], and PCI_EN) (continued)

CONFIGURATION

NO.

IPD/

PIN

IPU(1)

AEA14

R25

IPD

AEA13

R27

IPU

AEA12

R28

IPD

AEA11

T25

IPD

[M25,

AEA[10:9]IPD M27]

AEA8

P25

IPD

AEA7

N27

IPD

AEA6

U27

IPD

AEA5

U28

IPD

FUNCTIONAL DESCRIPTION

HPI peripheral bus width select (HPI_WIDTH).

0HPI operates in HPI16 mode (default).

HPI bus is 16 bits wide; HD[15:0] pins are used and the remaining HD[31:16] pins are reserved pins in the Hi-Z state.

1HPI operates in HPI32 mode.

HPI bus is 32 bits wide; HD[31:0] pins are used.

Applies only when HPI function of HPI/PCI multiplexed pins is selected (PCI_EN pin = 0).

Device Endian mode (LENDIAN).

0 System operates in Big Endian mode.

1 System operates in Little Endian mode (default).

UTOPIA pin function enable bit (UTOPIA_EN).

This pin selects the function of the UTOPIA/EMAC and UTOPIA/MDIO multiplexed pins.

0UTOPIA pin function disabled; EMAC and MDIO pin function enabled (default). This means all multiplexed UTOPIA/EMAC and UTOPIA/MDIO pins function as EMAC and MDIO pins. The interface used by EMAC/MDIO (MII, RMII, GMII or the standalone RGMII) is controlled by the MACSEL[1:0] pins (AEA[10:9]).

1UTOPIA pin function enabled; EMAC and MDIO pin function disabled.

This means all multiplexed UTOPIA/EMAC and UTOPIA/MDIO pins now function as UTOPIA. The EMAC/MDIO peripheral can still be used with RGMII (MACSEL[1:0] = 11).

For proper C6455 device operation, this pin must be externally pulled up with a 1-kΩresistor at device reset.

EMAC Interface Selects (MACSEL[1:0]).

These pins select the interface used by the EMAC/MDIO peripheral.

00 10/100 EMAC/MDIO with MII Interface [default]

01 10/100 EMAC/MDIO with RMII Interface

10 10/100/1000 EMAC/MDIO with GMII Interface

11 10/100/1000 EMAC/MDIO with RGMII Interface

If the UTOPIA pin function is selected [UTOPIA_EN (AEA12 pin) = 1] for multiplexed UTOPIA/EMAC and UTOPIA/MDIO pins, the EMAC/MDIO peripheral can only be used with

RGMII.

For more detailed information on the UTOPIA_EN and MAC_SEL[1:0] control pin selections, see Table 3-3.

PCI I2C EEPROM Auto-Initialization (PCI_EEAI).

PCI auto-initialization via external I2C EEPROM

0PCI auto-initialization through external I2C EEPROM is disabled. The PCI peripheral uses the specified PCI default values (default).

1PCI auto-initialization through external I2C EEPROM is enabled. The PCI peripheral is configured through external I2C EEPROM provided the PCI peripheral pins are enabled (PCI_EN = 1).

Note: If the PCI pin function is disabled (PCI_EN pin = 0), this pin must not be pulled up.

For proper C6455 device operation, do not oppose the IPD on this pin.

PCI Frequency Selection (PCI66).

Selects the operating frequency of the PCI (either 33 MHz or 66 MHz).

0 PCI operates at 33 MHz (default)

1 PCI operates at 66 MHz

Note: If the PCI pin function is disabled (PCI_EN pin = 0), this pin must not be pulled up.

McBSP1 pin function enable bit (MCBSP1_EN).

Selects which function is enabled on the McBSP1/GPIO multiplexed pins.

0GPIO pin function enabled (default).

This means all multiplexed McBSP1/GPIO pins function as GPIO pins.

1McBSP1 pin function enabled.

This means all multiplexed McBSP1/GPIO pins function as McBSP1 pins.

60

Device Configuration

Submit Documentation Feedback

Page 60
Image 60
Texas Instruments SM320C6455-EP manual AEA14, AEA13, AEA12, AEA11, AEA8, AEA6, AEA5, Rgmii