OMAP-L137
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SPRS563G – SEPTEMBER 2008 – REVISED JUNE 2014
3.7.11 Universal Asynchronous Receiver/Transmitters (UART0, UART1, UART2)
Table 3-15. Universal Asynchronous Receiver/Transmitter (UART) Terminal Functions
PIN
NO
SIGNAL NAME
TYPE
(1)
PULL
(2)
MUXED
DESCRIPTION
ZKB
UART0
I2C0, BOOT,
UART0_RXD
/I2C0_SDA/TM64P0_IN12/GP5[8]/BOOT[8]
R3
I
IPU
UART0 receive data
Timer0, GPIO,
I2C0, Timer0, GPIO,
UART0 transmit
UART0_TXD
/I2C0_SCL/TM64P0_OUT12/GP5[9]/BOOT[9]
P3
O
IPU
BOOT
data
UART0 ready-to-
SPI0_SCS[0]/
UART0_RTS
/EQEP0B/GP5[4]/BOOT[4]
N4
O
IPU
send output
SPI0, eQEP0, GPIO,
BOOT
UART0 clear-to-
SPI0_ENA/
UART0_CTS
/EQEP0A/GP5[3]/BOOT[3]
R5
I
IPU
send input
UART1
UART1_RXD
/AXR0[9]/GP3[9]
(3)
C6
I
IPD
UART1 receive data
McASP0, GPIO
UART1 transmit
UART1_TXD
/AXR0[10]/GP3[10]
(3)
D6
O
IPD
data
UART2
SPI1_ENA/
UART2_RXD
/GP5[12]
R4
I
IPU
UART2 receive data
SPI1, GPIO
UART2 transmit
SPI1_SCS[0]/
UART2_TXD
/GP5[13]
P4
O
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 OMAP-L137 C6000 DSP+ARM Processor Technical Reference Manual (
SPRUH92
) for
more for details on entering UART1 boot mode.
Copyright © 2008–2014, Texas Instruments Incorporated
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