TMS320C6421 datasheet(39/59 Pages) TI

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TMS320C6421

Fixed-Point Digital Signal Processor

SPRS346A – JANUARY 2007 – REVISED MARCH 2007

Table 2-21. UART0 Terminal Functions

SIGNAL

TYPE(1)

OTHER(2)(3)

DESCRIPTION

ZWT

ZDU

NAME

NO.

UART0

URXD0/

IPU

This pin is multiplexed between UART0 (Data) and GPIO.

I/O/Z

GP[85]

DVDD33

When used by UART0 this pin is the receive data input URXD0.

UTXD0/

IPU

This pin is multiplexed between UART0 (Data) and GPIO.

I/O/Z

GP[86]

DVDD33

In UART0 mode, this pin is the transmit data output UTXD0.

UCTS0/

IPU

This pin is multiplexed between the UART0 (Flow Control) and GPIO.

I/O/Z

GP[87]

DVDD33

In UART0 mode, this pin is the clear to send input UCTS0.

URTS0/

This pin is multiplexed between the UART0 (Flow Control), PWM0,

IPU

PWM0/

I/O/Z

and GPIO.

DVDD33

GP[88]

In UART0 mode, this pin is the ready to send output URTS0.

(1)

I = Input, O = Output, Z = High impedance, S = Supply voltage, GND = Ground, A = Analog signal

(2)

IPD = Internal pulldown, IPU = Internal pullup. For more detailed information on pullup/pulldown resistors and situations where external

pullup/pulldown resistors are required, see Section 3.2.1, Pullup/Pulldown Resistors.

(3)

Specifies the operating I/O supply voltage for each signal

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