TMS320C6454

Fixed-Point Digital Signal Processor

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SPRS311A –APRIL 2006 –REVISED DECEMBER 2006

Table 7-88. Switching Characteristics Over Recommended Operating Conditions for EMAC RGMII

Transmit (1)(see Figure 7-70)

 

 

 

-720

 

NO.

 

PARAMETER

-850

UNIT

 

-1000

 

 

 

 

 

 

 

MIN

MAX

5

tsu(TXD-TXCH)

Setup time, transmit selected signals valid before TXC (at DSP) high/low

1.2

ns

6

th(TXCH-TXD)

Hold time, transmit selected signals valid after TXC (at DSP) high/low

1.2

 

(1)For RGMII, transmit selected signals include: TXD[3:0] and TXCTL.

TXC at DSP pins

TXC (at DSP)(B)

TXD[3:0](A)

TXCTL(A)

1

2

3

1

1st Half-byte 2nd Half-byte

2

TXENTXERR

Internal TXC

4

5

6

4

PRODUCT PREVIEW

A.Data and control information is transmitted using both edges of the clocks. TXD[3:0] carries data bits 3-0 on the rising edge of TXC and data bits 7-4 on the falling edge of TXC. Similarly, TX_CTL carries TXEN on rising edge of TXC and TXERR of falling edge.

B.TXC is delayed internally before being driven to the TXC pin.

Figure 7-70. EMAC Transmit Interface Timing [RGMII Operation](A)(B)

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C64x+ Peripheral Information and Electrical Specifications

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Texas Instruments TMS320C6454 warranty Emac Transmit Interface Timing Rgmii OperationAB