TMS320C6472ECTZ datasheet(59/269 Pages) TI1

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TMS320C6472

www.ti.com

SPRS612G

– JUNE 2009 – REVISED JULY 2011

Device Configuration

On the C6472 device, boot mode and certain device configurations/peripheral selections are determined

at device reset. Following device reset, the software needs to enable and configure the desired peripheral

modules.

3.1

Device Configuration at Device Reset

Table 3-1 describes the C6472 device configuration pins. The logic level of these pins is latched at reset

to determine the device configuration. The logic level on the device configuration pins can be set by using

external pullup/pulldown resistors or by using some control device (e.g., FPGA/CPLD) to intelligently drive

these pins. When using a control device, care should be taken to ensure there is no contention on the

lines when the device is out of reset. The RESETSTAT pin can be monitored for this purpose. The device

configuration pins are sampled during reset and may be driven after the reset is removed. At this time, the

control device should ensure it has stopped driving the device configuration pins of the DSP to avoid

contention.

Table 3-1. C6472 Device Configuration Pins

CONFIGURATION

IPD/

NO.

FUNCTIONAL DESCRIPTION

IPU(1)

For more detailed information on the boot modes, see Section 2.4, Boot Mode

GP[9:6]_BOOTMODE[3:0]

IPU

Sequence, of this document.

Configuration GPI (General-Purpose Inputs for Configuration purposes

CFGGP[4:0])

GP[14:10]_CFGGP[4:0]

IPD

These pins are used in S/W routines located in internal ROM for boot operations.

For more detailed information on the use of the configuration pins for boot

operation, see Section 2.4, Boot Mode Sequence, of this document.

Enable SYSCLKOUT

GP[15]_SYSCLKOUTEN

IPD

0 - SYSCLKOUT is disabled (default)

1 - SYSCLKOUT is enabled

EMAC Interface selection for EMAC 1 (EMAC1_EN in the DEVCTL register must

be a 1 for these to be functional)

00 - Reserved

MACSEL1[1:0]

IPD

01 - SS-SMII (SS Mode)

10 - RGMII

11 - RMII

EMAC Interface selection for EMAC 0

000 - MII

001 - RMII

010 - GMII

MACSEL0[2:0]

IPD

011 - RGMII

100 - Reserved

101 - SS-SMII (SS Mode)

110 - Reserved

111 - Disabled

Device Endian mode (LENDIAN)

LENDIAN

IPU

0 - System operates in Big Endian mode

1 - System operates in Little Endian mode (default)

DDR2 Memory Controller enable (DDR2_EN)

0 - DDR2 Memory Controller module and pins are disabled (default)

DDREN

IPD

1 - DDR2 Memory Controller module and pins are enabled

Note that this is a static configuration input from reset.

RIOEN RapidIO enable

0 - RapidIO module and pins are disabled (default)

RIOEN

IPD

1 - RapidIO module and pins are enabled

Note that this is a static configuration input from reset.

(1)

IPD = Internal pulldown, IPU = Internal pullup. (These IPD/IPU signal pins feature a 30-k

Ω IPD or IPU resistor. To pull up a signal to the

opposite supply rail, a 1-k

Ω resistor should be used.)

Device Configuration

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