TMS320VC5421 datasheet(19/104 Pages) TI1

19 / 104 page

Introduction

December 1999 − Revised October 2008

SPRS098D

2.4

Signal Descriptions

Table 2−3 lists each signal, function, and operating mode(s) grouped by function. See pin assignments section

for exact pin locations based on package type.

Table 2−3. Signal Descriptions

PIN NAME

TYPE†

DESCRIPTION

DATA SIGNALS

PPA18 (MSB)

PPA17

PPA16

PPA15

PPA14

PPA13

PPA12

PPA11

PPA10

PPA9

PPA8

PPA7

PPA6

PPA5

PPA4‡§

PPA3

PPA2

PPA1

PPA0 (LSB)

I/O/Z

Parallel port address bus. The DSP can access the external memory locations by way of the external

memory interface using PPA[18:0] in external memory interface (EMIF) mode when the XIO pin is logic

high. PPA18 is a secondary output function of the SELA/B pin.

The PPA[17:0] pins are also multiplexed with the HPI interface. In HPI mode (XIO pin is low), the external

address pins PPA[17:0] are used by a host processor for access to the memory map by way of the on-chip

HPI. Refer to the Host-Port Interface (HPI) Signals section of this table for details on the secondary

functions of these pins.

These pins are placed into the high-impedance state when OFF is low.

† I = Input, O = Output, S = Supply, Z = High Impedance

‡ This pin has an internal pullup resistor.

§ These pins are Schmitt triggered inputs.

¶ This pin has an internal bus holder controlled by way of the BSCR register in 54x cLEAD core of DSP subsystem A .

# This pin is used by Texas Instruments for device testing and should be left unconnected.

|| This pin has an internal pulldown resistor.

kAlthough this pin includes an internal pulldown resistor, a 470-Ω external pulldown is required. If the TRST pin is connected to multiple DSPs,

a buffer is recommended to ensure the VIL and VIH specifications are met.

TMS320VC5421 Datasheet(PDF) 19 Page - Texas Instruments

TMS320VC5421 Datasheet(HTML) 19 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

Datasheet Download

Link URL