Texas Instruments AM18x eXperimenter's Kit TMDSEXP1808L TMDSEXP1808L Datenbogen
Produktcode
TMDSEXP1808L
SPRS653E – FEBRUARY 2010 – REVISED MARCH 2014
3.7.12 Universal Asynchronous Receiver/Transmitters (UART0, UART1, UART2)
Table 3-14. Universal Asynchronous Receiver/Transmitter (UART) Terminal Functions
SIGNAL
POWER
TYPE
(1)
PULL
(2)
DESCRIPTION
GROUP
(3)
NAME
NO.
UART0
SPI0_SCS[5] / UART0_RXD / GP8[4] / MII_RXD[3]
C19
I
CP[8]
A
UART0 receive data
SPI0_SCS[4] / UART0_TXD / GP8[3] / MII_RXD[2]
D18
O
CP[8]
A
UART0 transmit data
SPI0_SCS[2] / UART0_RTS / GP8[1] / MII_RXD[0] /
D16
O
CP[9]
A
UART0 ready-to-send output
SATA_CP_DET
SPI0_SCS[3] / UART0_CTS / GP8[2] / MII_RXD[1] /
E17
I
CP[9]
A
UART0 clear-to-send input
SATA_MP_SWITCH
UART1
SPI1_SCS[3] / UART1_RXD / SATA_LED / GP1[1]
E18
I
CP[13]
A
UART1 receive data
SPI1_SCS[2] / UART1_TXD / SATA_CP_POD / GP1[0]
F19
O
CP[13]
A
UART1 transmit data
AHCLKR / PRU0_R30[18] / UART1_RTS / GP0[11] /
A2
O
CP[0]
A
UART1 ready-to-send output
PRU0_R31[18]
AHCLKX / USB_REFCLKIN / UART1_CTS / GP0[10] /
A3
I
CP[0]
A
UART1 clear-to-send input
PRU0_R31[17]
UART2
SPI1_SCS[5] / UART2_RXD / I2C1_SCL / GP1[3]
F17
I
CP[12]
A
UART2 receive data
SPI1_SCS[4] / UART2_TXD / I2C1_SDA / GP1[2]
F16
O
CP[12]
A
UART2 transmit data
AMUTE / PRU0_R30[16] / UART2_RTS / GP0[9] /
D5
O
CP[0]
A
UART2 ready-to-send output
PRU0_R31[16]
RTC_ALARM / UART2_CTS / GP0[8] / DEEPSLEEP
F4
I
CP[0]
A
UART2 clear-to-send input
(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 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.
Note: The pin type shown refers to the input, output or high-impedance state of the pin function when configured as 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; CP[n] = configurable pull-up/pull-down (where n is the pin group) using
the PUPDENA and PUPDSEL registers in the System Module.The pull-up and pull-down control of these pins is not active until the
device is out of reset. During reset, all of the pins associated with these registers are pulled down. If the application requires a pull-up,
an external pull-up can be used. For more detailed information on pullup/pulldown resistors and situations where external
pullup/pulldown resistors are required, see the
the PUPDENA and PUPDSEL registers in the System Module.The pull-up and pull-down control of these pins is not active until the
device is out of reset. During reset, all of the pins associated with these registers are pulled down. If the application requires a pull-up,
an external pull-up can be used. For more detailed information on pullup/pulldown resistors and situations where external
pullup/pulldown resistors are required, see the
section. For electrical specifications on pullup and internal pulldown
circuits, see the
section.
(3)
This signal is part of a dual-voltage IO group (A, B or C). These groups can be operated at 3.3V or 1.8V nominal. The three groups can
be operated at independent voltages but all pins withina group will operate at the same voltage. Group A operates at the voltage of
power supply DVDD3318_A. Group B operates at the voltage of power supply DVDD3318_B. Group C operates at the voltage of power
supply DVDD3318_C.
be operated at independent voltages but all pins withina group will operate at the same voltage. Group A operates at the voltage of
power supply DVDD3318_A. Group B operates at the voltage of power supply DVDD3318_B. Group C operates at the voltage of power
supply DVDD3318_C.
34
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