r5s77631ay266bgv Renesas Electronics Corporation., r5s77631ay266bgv Datasheet - Page 1025

• Manufacturer Part Number: r5s77631ay266bgv
• Description: Renesas 32-bit Risc Microcomputer Superhtm Risc Engine Family Sh-4a Series
• Manufacturer: Renesas Electronics Corporation.

Figure 23.9 shows the status change of the E-MAC transmitter. This operation is common among
port 0 and port 1.
1. When the TE bit in ECMR is set, the transmitter enters the transmit idle state.
2. When a transmit request is issued by the transmit E-DMAC, the E-MAC sends the preamble to
3. The transmitter sends the SFD, data, and CRC sequentially. At the end of transmission, the
4. After waiting for the frame interval time, the transmitter enters the idle state, and if there is
GMII/MII/RMII after a transmission delay caused by the carrier detection and frame interval
time. If full-duplex transfer is selected, which does not require carrier detection, the preamble
is sent as soon as a transmit request is issued by the E-DMAC.
transmit E-DMAC generates a transmission complete interrupt (TC). If a collision or the
carrier-not-detected state occurs during data transmission, these are reported as interrupt
sources.
more transmit data, continues transmitting.
Section 23 Gigabit Ethernet Controller (GETHER)
Rev. 1.00 Oct. 01, 2007 Page 959 of 1956
REJ09B0256-0100