Texas Instruments TMS320C6454 - Manual (Page 202)

www.ti.com
PRODUCT PREVIEW
TXC (at DSP) (B)
TXD[3:0] (A)
TXCTL (A)
5
6
1st Half-byte
TXERR TXEN
2nd Half-byte
1
2
Internal TXC
TXC at DSP pins
4
4
2
3
1
TMS320C6454
Fixed-Point Digital Signal Processor
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
-850
NO. PARAMETER UNIT
-1000
MIN MAX
5 t
su(TXD-TXCH)
Setup time, transmit selected signals valid before TXC (at DSP) high/low 1.2 ns
6 t
h(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.
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)
202 C64x+ Peripheral Information and Electrical Specifications Submit Documentation Feedback