TMS320C6745DPTP3 datasheet(39/227 Pages) TI

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TMS320C6745, TMS320C6747

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SPRS377E – SEPTEMBER 2008 – REVISED FEBRUARY 2013

2.6.11 Universal Asynchronous Receiver/Transmitters (UART0, UART1, UART2)

Table 2-16. Universal Asynchronous Receiver/Transmitter (UART) Terminal Functions

PIN NO

SIGNAL NAME

TYPE(1)

PULL(2)

MUXED

DESCRIPTION

PTP

ZKB

UART0

I2C0, BOOT,

UART0 receive

UART0_RXD/I2C0_SDA/TM64P0_IN12/GP5[8]/BOOT[8]

IPU

Timer0, GPIO,

data

I2C0, Timer0,

UART0 transmit

UART0_TXD/I2C0_SCL/TM64P0_OUT12/GP5[9]/BOOT[9]

IPU

GPIO, BOOT

data

UART0 ready-to-

SPI0_SCS[0]/ UART0_RTS /EQEP0B/GP5[4]/BOOT[4]

IPU

send output

SPI0, eQEP0,

GPIO, BOOT

UART0 clear-to-

SPI0_ENA/ UART0_CTS /EQEP0A/GP5[3]/BOOT[3]

IPU

send input

UART1

UART1 receive

UART1_RXD/AXR0[9]/GP3[9](3)

122

IPD

data

McASP0, GPIO

UART1 transmit

UART1_TXD/AXR0[10]/GP3[10](3)

123

IPD

data

UART2

UART2 receive

SPI1_ENA/UART2_RXD/GP5[12]

IPU

data

SPI1, GPIO

UART2 transmit

SPI1_SCS[0]/UART2_TXD/GP5[13]

IPU

data

(1)

I = Input, O = Output, I/O = Bidirectional, Z = High impedance, PWR = Supply voltage, GND = Ground, A = Analog signal.

Note: The pin type shown refers to the input, output or high-impedance state of the pin function when configured as the the signal name

highlighted in bold. All multiplexed signals may enter a high-impedance state when the configured function is input-only or the configured

function supports high-Z operation. All GPIO signals can be used as input or output. For multiplexed pins where functions have different

types (ie., input versus output), the table reflects the pin function direction for that particular peripheral.

(2)

IPD = Internal Pulldown resistor, IPU = Internal Pullup resistor

(3)

As these signals are internally pulled down while the device is in reset, it is necessary to externally pull them high with resistors if

UART1 boot mode is used. Please see the TMS320C6745/C6747 DSP System Reference Guide - Literature Number SPRUFK4 for

more for details on entering UART1 boot mode.

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