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Texas Instruments TMS320C6455 User Manual

Texas Instruments TMS320C6455
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TMS320C6455
www.ti.com
SPRS276M MAY 2005REVISED MARCH 2012
Table 7-70. EMAC/MDIO Multiplexed Pins (MII, RMII, and GMII Modes)
BALL NUMBER DEVICE PIN NAME MII RMII GMII
(MAC_SEL = (MAC_SEL = (MAC_SEL =
00b) 01b) 10b)
J2 URDATA0/MRXD0/RMRXD0 MRXD0 RMRXD0 MRXD0
H3 URDATA1/MRXD1/RMRXD1 MRXD1 RMRXD1 MRXD1
J1 URDATA2/MRXD2 MRXD2 MRXD2
J3 URDATA3/MRXD3 MRXD3 MRXD3
L1 URDATA4/MRXD4 MRXD4
L2 URDATA5/MRXD5 MRXD5
H2 URDATA6/MRXD6 MRXD6
M2 URDATA7/MRXD7 MRXD7
M1 UXDATA0/MTXD0/RMTXD0 MTXD0 RMTXD0 MTXD0
L4 UXDATA1/MTXD1/RMTXD1 MTXD1 RMTXD1 MTXD1
M4 UXDATA2/MTXD2 MTXD2 MTXD2
K4 UXDATA3/MTXD3 MTXD3 MTXD3
L3 UXDATA4/MTXD4 MTXD4
L5 UXDATA5/MTXD5 MTXD5
M3 UXDATA6/MTXD6 MTXD6
N5 UXDATA7/MTXD7 MTXD7
H4 URSOC/MRXER/RMRXER MRXER RMRXER MRXER
H5 URENB/MRXDV MRXDV MRXDV
J5 UXENB/MTXEN/RMTXEN MTXEN RMTXEN MTXEN
J4 URCLAV/MCRS/RMCRSDV MCRS RMCRSDV MCRS
K3 UXSOC/MCOL MCOL MCOL
K5 UXCLAV/GMTCLK GMTCLK
H1 URCLK/MRCLK MRCLK MRCLK
N4 UXCLK/MTCLK/REFCLK MTCLK RMREFCLK MTCLK
N3 UXADDR3/GMDIO MDIO MDIO MDIO
M5 UXADDR4/GMDCLK MDCLK MDCLK MDCLK
Using the RMII Mode of the EMAC
The Ethernet Media Access Controller (EMAC) contains logic that allows it to communicate using the
Reduced Media Independent Interface (RMII) protocol. This logic must be taken out of reset before being
used. To use the RMII mode of the EMAC follow these steps:
1. Enable the EMAC/MDIO through the Device State Control Registers.
Unlock the PERCFG0 register by writing 0x0F0A 0B00 to the PERLOCK register.
Set bit 4 in the PERCFG0 register within 16 SYSCLK3 clock cycles to enable the EMAC/MDIO.
Poll the PERSTAT0 register to verify state change.
2. Initialize the EMAC/MDIO as needed.
3. Release the RMII logic from reset by clearing the RMII_RST bit of the EMAC Configuration Register
(see Section 3.4.5).
As described in the previous section, the RMII mode of the EMAC must be selected by setting
MACSEL[1:0] = 01b at device reset.
Copyright © 2005–2012, Texas Instruments Incorporated C64x+ Peripheral Information and Electrical Specifications 201
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BrandTexas Instruments
ModelTMS320C6455
CategorySignal Processors
LanguageEnglish

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