SH7712 Datasheet, PDF (705/978 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series

Section 18 Ethernet Controller (EtherC)
18.3.27 Transmit/Relay Priority Control Mode Register (Port 0) (TSU_PRISL0)
TSU_PRISL0 sets the priority control mode when the transmission request from the E-DMAC to
MAC-0 come into collision with port 1 to 0 relay operations. Writing to this register is prohibited,
after relay operations have been enabled once (after the FWEN0 in TSU_FWEN0 or the FWEN1
in TSU_FWEN1 is set to 1).
Bit
Bit Name
31 to 15 
Initial
Value
All 0
14 to 12 PRIMD02 to All 0
PRIMD00
11 to 8 
All 0
R/W Description
R
Reserved
These bits are always read as 0. The write value
should always be 0.
R/W Sets the priority control mode of MAC-0 transmission
and port 1 to 0 relay operations.
H′0: Round robin
H′1: Transmission priority
H′2: Relay priority
H′4: Round robin, however switched to relay priority
when TSU FIFO use amount exceeds the set
value of PRISL07 to PRISL00
H′5: Transmission priority, however switched to relay
priority when TSU FIFO use amount exceeds
the set value of PRISL07 to PRISL00
Others: Setting prohibited
R
Reserved
These bits are always read as 0. The write value
should always be 0.
Rev. 1.00 Dec. 27, 2005 Page 663 of 932
REJ09B0269-0100