AM3892 datasheet(79/299 Pages) TI

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AM3894

AM3892

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SPRS681A – OCTOBER 2010 – REVISED MARCH 2011

Table 3-21. UART1 Terminal Functions

SIGNAL

TYPE(1)

OTHER(2) (3)

MUXED

DESCRIPTION

NAME

NO.

UART1_RXD/

PULL: IPD / IPD

UART1 Receive Data Input. Functions as IrDA

GPMC

GPMC_A[26]/

DRIVE: Z / Z

receive input in IrDA modes and CIR receive input in

PINCTRL181

GPMC_A[20]

DVDD_3P3

CIR mode.

UART1_TXD/

PULL: IPD / DIS

GPMC

UART1 Transmit Data Output. Functions as transmit

GPMC_A[25]/

DRIVE: L / H

PINCTRL182

output in CIR and IrDA modes.

GPMC_A[19]

DVDD_3P3

UART1_RTS /

PULL: IPU / DIS

UART1 Request to Send Output. Indicates module is

GPMC_A[14]/

GPMC, GP1

DRIVE: H / H

ready to receive data. Functions as SD output in IrDA

GPMC_A[18]/

PINCTRL183

DVDD_3P3

mode.

GP1[25]

UART1_CTS /

PULL: IPU / IPU

GPMC_A[13]/

GPMC, GP1

UART1 Clear to Send Input. Has no function in IrDA

I/O

DRIVE: Z / Z

GPMC_A[17]/

PINCTRL184

and CIR modes.

DVDD_3P3

GP1[26]

(1)

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

(2)

PULL: A / B, where:

A is the state of the internal pull resistor during POR reset

B is the state of the internal pull resistor after POR and Warm reset are de-asserted and during Warm reset

IPD = Internal Pulldown Enabled, IPU = Internal Pullup Enabled, DIS = Internal Pull Disabled

DRIVE: A / B, where;

A is the driving state of the pin during POR reset

B is the driving state of the pin after POR and Warm reset are de-asserted and during Warm reset

H = Driving High, L = Driving Low, Z = 3-State

For more detailed information on pullup/pulldown resistors and situations where external pullup/pulldown resistors are required, see

Section 4.2.1, Pullup/Pulldown Resistors.

(3)

Specifies the operating I/O supply voltage for each signal.

Device Pins

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