SH7712 Datasheet, PDF (817/978 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series

Section 19 Ethernet Controller Direct Memory Access Controller (E-DMAC)
Threshold
( threshold − 32) bytes
empty
ARBUSY signal
Minimum value (low): 150 nsec (Exernal bus
operated at 66.66MHz and 16-byte burst
transfer (5 cycle × 2))
t
Minimum value (high): 2560 nsec (100 Base-T
(100M Ether) operation)
(Time for receiving 32-byte data)
Figure 19.10 ARBUSY Signal Change and Minimum Pulse Width
Depending on Increase and Decrease of FIFO
Rev. 1.00 Dec. 27, 2005 Page 775 of 932
REJ09B0269-0100