AM1808 datasheet(39/262 Pages) TI

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AM1808

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SPRS653C

– FEBRUARY 2010 – REVISED DECEMBER 2011

2.7.18 Ethernet Media Access Controller (EMAC)

Table 2-20. Ethernet Media Access Controller (EMAC) Terminal Functions

SIGNAL

POWER

TYPE(1)

PULL(2)

DESCRIPTION

GROUP(3)

NAME

NO.

MII

AXR6 / CLKR0 / GP1[14] / MII_TXEN / PRU0_R31[6]

CP[5]

EMAC MII Transmit enable output

AXR5 / CLKX0 / GP1[13] / MII_TXCLK

CP[5]

EMAC MII Transmit clock input

AXR4 / FSR0 / GP1[12] / MII_COL

CP[5]

EMAC MII Collision detect input

AXR3 / FSX0 / GP1[11] / MII_TXD[3]

CP[5]

AXR2 / DR0 / GP1[10] / MII_TXD[2]

CP[5]

EMAC MII transmit data

AXR1 / DX0 / GP1[9] / MII_TXD[1]

CP[5]

AXR0 / ECAP0_APWM0 / GP8[7] / MII_TXD[0] /

CP[6]

CLKS0

SPI0_SOMI / EPWMSYNCI / GP8[6] / MII_RXER

C16

CP[7]

EMAC MII receive error input

SPI0_SIMO / EPWMSYNCO / GP8[5] / MII_CRS

C18

CP[7]

EMAC MII carrier sense input

SPI0_CLK / EPWM0A / GP1[8] / MII_RXCLK

D19

CP[7]

EMAC MII receive clock input

SPI0_ENA / EPWM0B / PRU0_R30[6] / MII_RXDV

C17

CP[7]

EMAC MII receive data valid input

SPI0_SCS[5] / UART0_RXD / GP8[4] / MII_RXD[3]

C19

CP[8]

SPI0_SCS[4] /UART0_TXD / GP8[3] / MII_RXD[2]

D18

CP[8]

SPI0_SCS[3] / UART0_CTS / GP8[2] / MII_RXD[1] /

EMAC MII receive data

E17

CP[9]

SATA_MP_SWITCH

SPI0_SCS[2] / UART0_RTS / GP8[1] / MII_RXD[0] /

D16

CP[9]

SATA_CP_DET

RMII

VP_DIN[1] / UHPI_HD[9] / UPP_D[9] /

W18

I/O

CP[26]

EMAC 50-MHz clock input or output

RMII_MHZ_50_CLK / PRU0_R31[23]

VP_DIN[2] / UHPI_HD[10] / UPP_D[10] / RMII_RXER /

W17

CP[26]

EMAC RMII receiver error

PRU0_R31[24]

VP_DIN[3] / UHPI_HD[11] / UPP_D[11] / RMII_RXD[0]

V17

CP[26]

/ PRU0_R31[25]

EMAC RMII receive data

VP_DIN[4] / UHPI_HD[12] / UPP_D[12] / RMII_RXD[1]

W16

CP[26]

/ PRU0_R31[26]

VP_DIN[0] / UHPI_HD[8] / UPP_D[8] / RMII_CRS_DV/

W19

CP[26]

EMAC RMII carrier sense data valid

PRU1_R31[29]

VP_DIN[5] / UHPI_HD[13] / UPP_D[13] / RMII_TXEN /

R14

CP[26]

EMAC RMII transmit enable

PRU0_R31[27]

VP_DIN[6] / UHPI_HD[14] / UPP_D[14] / RMII_TXD[0]

V16

CP[26]

/ PRU0_R31[28]

EMAC RMII transmit data

VP_DIN[7] / UHPI_HD[15] / UPP_D[15] / RMII_TXD[1]

U18

CP[26]

/ PRU0_R31[29]

(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.

(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 electrical specifications on the pull-up and and internal pull-down circuits, see the Device Operating

Conditions 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.

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