TMS320VC5471GHKA datasheet(16/97 Pages) TI

16 / 97 page

Introduction

June 2001 – Revised December 2002

SPRS180C

2.3

Terminal Functions

Table 2–2 lists each terminal name, function, and operating mode(s) for the 5471 device. Some of the 5471

pins can be configured for one of two functions — a primary function and a secondary function. Table 2–3

provides a list of pins containing an internal pullup or pulldown function, including each pins functional pullup

or pulldown value.

Table 2–2. Terminal Functions

TERMINAL NAME

I/O/Z†

DESCRIPTION

GPIO00–GPIO04

I/O

General-purpose input/output 00 through general-purpose input/output 04

GPIO05/SDRAM_CKE

I/O

General-purpose input/output 05 or SDRAM CKE signal

GPIO06/CLK16X_IRDA/SD_IRDA

I/O

General-purpose input/output 06 or 16x Serial Transmit Clock or IRDA Transceiver Shutdown

GPIO07/TX_IRDA/TXIR_IRDA

I/O

General-purpose input/output 07 or IRDA Transmit Data or IRDA Transmit Pulse

GPIO08/RX_IRDA/RXIR_IRDA

I/O

General-purpose input/output 08 or IRDA Receive Data or IRDA Receive Pulse

GPIO09/TX_MODEM

I/O

General-purpose input/output 09 or Modem TX Data Output

GPIO10/RX_MODEM

I/O

General-purpose input/output 10 or Modem RX Data Input

GPIO11/CTS_MODEM

I/O

General-purpose input/output 11 or Modem Clear-To-Send Input

GPIO12/RTS_MODEM

I/O

General-purpose input/output 12 or Modem Ready-To-Send Output

GPIO13/DCD_MODEM

I/O

General-purpose input/output 13 or Modem Carrier Detect Output

GPIO14/MCUEN2

I/O

General-purpose input/output 14 or SPI Enable Trigger bit 2

GPIO15/ MCUEN1

I/O

General-purpose input/output 15 or SPI Enable Trigger bit 1

GPIO16/SDA

I/O

General-purpose input/output 16 or I2C Serial Data

GPIO17/SCL

I/O

General-purpose input/output 17 or I2C Serial Clock

GPIO18/AUDIO_CLK

I/O

General-purpose input/output 18 or Audio Clock output

GPIO19/TIMER_OUT

I/O

General-purpose input/output 19 or MCU Timer 2 Output

KBGPIO00

I/O

Keyboard input/output 0

KBGPIO01/DSP_XF

I/O

Keyboard input/output 1or DSP XF output

KBGPIO02/ARM_OPC

I/O

Keyboard input/output 2 or active-low MCU opcode fetch output

KBGPIO03/ARM_MREQ

I/O

Keyboard input/output 3 or active-low MCU memory request output

KBGPIO04/ARM_EXEC

I/O

Keyboard input/output 4 or active-low MCU executed output

KBGPIO05/ARM_TBIT

I/O

Keyboard input/output 5 or MCU 16/32-bit instruction execution output

KBGPIO06/ARM_FIQ

I/O

Keyboard input/output 6 or active-low MCU fast interrupt output

KBGPIO07/ARM_IRQ

I/O

Keyboard input/output 7 or MCU normal interrupt output

KBGPIO08–KBGPIO09

I/O

Keyboard input/output bits 8–9‡

KBGPIO10/DSP_IACK

I/O

Keyboard input/output 10 or DSP interrupt acknowledge output‡

KBGPIO11/DSP_IAQ

I/O

Keyboard input/output 11 or active-low DSP instruction acquisition signal output‡

KBGPIO12/DSP_MSC

I/O

Keyboard input/output 12 or active-low DSP microstate complete signal output‡

KBGPIO13/DSP_TOUT

I/O

Keyboard input/output 13 or DSP timer output‡

KBGPIO14/ DSP_CLKOUT

I/O

Keyboard input/output 14 or DSP clock output‡

KBGPIO15/ARM_MCLK

I/O

Keyboard input/output 15 or MCU clock output‡

CLKX_SPI

SPI Serial clock

MCUDI/EXTERN0

SPI Input serial data/MCU EXTERN0 test signal input

MCUDO/EXTERN1

I/O

SPI Output serial data/MCU EXTERN1 test signal input

† I = input, O = output, Z = high-impedance

‡ The KBGPIO[15:8] pins include integrated pullup resistors.

§ The ARM7TDMI core can operate in either little- or big-endian mode. The 5471 configures the ARM7TDMI core’s endianness by sampling this

pin at the RESET rising edge.

¶ 5471 only supports MCU boot from a 16-bit or a 32-bit-wide memory implementation on CS0. The 5471 configures the ARM7TDMI starting

instruction size, and width of memory connected to CS0, by sampling this pin at the RESET rising edge.

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