TNETV1002IDZHK datasheet(17/102 Pages) TI1

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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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