TMS320TCI100QGLZ datasheet(39/137 Pages) TI1

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TMS320TCI100Q

FIXEDPOINT DIGITAL SIGNAL PROCESSOR

SPRS251E − JUNE 2004 − REVISED JUNE 2006

POST OFFICE BOX 1443

• HOUSTON, TEXAS 77251−1443

DEVICE CONFIGURATIONS (CONTINUED)

Table 27. Device Configuration Pins (BEA[20:13, 9:7], HD5, and BEA11) (Continued)

CONFIGURATION

NO.

FUNCTIONAL DESCRIPTION

BEA7

BEA8

BEA9

D15

A16

B16

Do not oppose IPD

Pullup (For proper device operation, this pin must be externally pulled up with a 1-k

Ω resistor.)

Pullup (For proper device operation, this pin must be externally pulled up with a 1-k

Ω resistor.)

HD5

HPI peripheral bus width (HPI_WIDTH)

− HPI operates as an HPI16.

(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.)

− HPI operates as an HPI32.

(HPI bus is 32 bits wide. All HD[31:0] pins are used for host-port operations.)

multiplexed pins

Multiplexed pins are pins that are shared by more than one peripheral and are internally multiplexed. Some of

these pins are configured by software, and the others are configured by external pullup/pulldown resistors only

at reset. Those muxed pins that are configured by software can be programmed to switch functionalities at any

time. Those muxed pins that are configured by external pullup/pulldown resistors are mutually exclusive; only

one peripheral has primary control of the function of these pins after reset. Table 28 identifies the multiplexed

pins on the TCI100Q device; shows the default (primary) function and the default settings after reset; and

describes the pins, registers, etc. necessary to configure specific multiplexed functions.

debugging considerations

It is recommended that external connections be provided to device configuration pins, including

CLKMODE[1:0], BEA[20:13, 11, 9:7], HD5/AD5, PCI_EN, and MCBSP2_EN. Although internal pullup/pulldown

resistors exist on these pins (except for HD5/AD5), providing external connectivity adds convenience to the user

in debugging and flexibility in switching operating modes.

Internal pullup/pulldown resistors also exist on the non-configuration pins on the BEA bus (BEA[12, 10, 6:1]).

Do not oppose the internal pullup/pulldown resistors on these non-configuration pins with external

pullup/pulldown resistors. If an external controller provides signals to these non-configuration pins, these

signals must be driven to the default state of the pins at reset, or not be driven at all.

For the internal pullup/pulldown resistors on the TCI100Q device pins, see the terminal functions table.

TMS320TCI100QGLZ Datasheet(PDF) 39 Page - Texas Instruments

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