TNETV1644ZDU6 datasheet(25/306 Pages) TI1

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2.6 Terminal Functions

TMS320DM6437

Digital Media Processor

www.ti.com

SPRS345D – NOVEMBER 2006 – REVISED JUNE 2008

The terminal functions tables (Table 2-5 through Table 2-32) identify the external signal names, the

associated pin (ball) numbers along with the mechanical package designator, the pin type, whether the pin

has any internal pullup or pulldown resistors, and a functional pin description. For more detailed

information on device configuration, peripheral selection, multiplexed/shared pin, and debugging

considerations, see the Device Configurations section of this data manual.

All device boot and configuration pins (except PCIEN) are multiplexed configuration pins— meaning they

are multiplexed with functional pins. These pins function as device boot and configuration pins only during

device reset. The input states of these pins are sampled and latched into the BOOTCFG register when

device reset is deasserted (see Note below). After device reset is deasserted, the values on these

multiplexed pins no longer have to hold the configuration.

The PCIEN pin is a standalone configuration pin. Its value is latched into the BOOTCFG register when

device reset is deasserted (see Note below). Unlike the multiplexed device boot and configuration pins,

the value on the PCIEN pin even after device reset is deasserted must hold the configuration.

For proper device operation, external pullup/pulldown resistors may be required on these device boot and

configuration pins. Section 3.9.1, Pullup/Pulldown Resistors discusses situations where external

pullup/pulldown resistors are required.

Note: Internal to the chip, the two device reset pins RESET and POR are logically AND’d together for the

purpose of latching device boot and configuration pins. The values on all device boot and configuration

pins are latched into the BOOTCFG register when the logical AND of RESET and POR transitions from

low-to-high.

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TNETV1644ZDU6 数据表(PDF) 25 Page - Texas Instruments