SH7616 Datasheet, PDF (432/935 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperH™ RISC engine Family/SH7600 Series

Section 9 Ethernet Controller (EtherC)
9.3.3 MII Frame Timing
Figures 9.4 (a) to (f) show the timing for various kinds of MII frames. The normal timing for
frame transmission is shown in figure 9.4 (a), the timing in the case of a collision during
transmission in figure 9.4 (b), and the timing in the case of an error during transmission in figure
9.4 (c). The normal timing for frame reception is shown in figure 9.4 (d), and the timing in the
case of errors during transmission in figures 9.4 (e) and (f).
TX-CLK
TX-EN
TXD3 –
TXD0
TX-ER
Preamble
SFD
Data
CRC
CRS
COL
Figure 9.4 (a) MII Frame Transmit Timing (Normal Transmission)
TX-CLK
TX-EN
TXD3 –
TXD0
TX-ER
CRS
COL
Preamble
JAM
Figure 9.4 (b) MII Frame Transmit Timing (Collision)
Rev. 2.00 Mar 09, 2006 page 406 of 906
REJ09B0292-0200