SPRUG18 datasheet(45/214 Pages) TI

45 / 214 page

TMS320C6474

www.ti.com

SPRS552H

– OCTOBER 2008 – REVISED APRIL 2011

Device Configuration

On the C6474 device, certain device configurations (like boot mode, pin multiplexing, and endianness) are

selected at device reset. The status of the peripherals (enabled/disabled) is determined after device reset.

By default, the peripherals on the device are disabled and must be enabled by software before being

used.

3.1

Device Configuration at Device Reset

Table 3-1 describes the C6474 device. The logic level is latched at reset to determine the device

configuration. The logic level can be set by using external pullup/pulldown resistors or by using some

control device to intelligently drive these pins. When using a control device, take care to avoid contention

on the lines when the device is out of reset. The are sampled during power-on reset and are driven after

the reset is removed. To avoid contention, the control device must stop driving the of the DSP.

NOTE

If a configuration pin must be routed out from the device, the internal pullup/pulldown

(IPU/IPD) resistor should not be relied upon; TI recommends the use of an external

pullup/pulldown resistor.

Table 3-1. Device Configuration Pins

CONFIGURATION

DEFAULT IPU/IPD

FUNCTIONAL DESCRIPTION

BOOTMODE[3:0]

0000b

Boot Mode Selection

LENDIAN

Device Endian Mode

Big Endian

Little Endian

DEVNUM[3:0]

0000b

Device number

CORECLKSEL

Core Clock Select

SYSCLK is shared between the Antenna Interface and the input to PLLCTL1.

ALTCORECLK is used as the input to PLLCTL1 and SYSCLK is used only for the

Antenna Interface.

3.2

Peripheral Selection After Device Reset

Several of the peripherals on the C6474 device are controlled by the Power/Sleep Controller (PSC). By

default the AIF, SRIO, TCP, and VCP are held in reset and clock-gated. The memories in these modules

are also in a low-leakage sleep mode. Software will be required to turn these memories on then enable

the modules (turn on clocks and de-assert reset) before these modules can be used.

If one of the above modules is used in the selected boot mode, the ROM code will automatically enable

the used module.

All other modules come up enabled by default and there is no special software sequence to enable.

For more detailed information on the PSC usage, see the TMS320C6474 DSP Power/Sleep Controller

(PSC) User's Guide (literature number SPRUG10).

Device Configuration

Submit Documentation Feedback

Product Folder Link(s) :TMS320C6474

SPRUG18 Datenblatt(PDF) 45 Page - Texas Instruments

SPRUG18 Datenblatt(HTML) 45 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datenblatt Download

Link URL