SH7710 Datasheet, PDF (707/996 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series

Initial
Bit
Bit Name Value
14 to 12 PRIMD12 to All 0
PRIMD10
11 to 8 
All 0
7 to 0 PRISL17 to All 0
PRISL10
Section 18 Ethernet Controller (EtherC)
R/W Description
R/W Sets the priority control mode of MAC-1 transmission
and port 0 to 1 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 PRISL17 to PRISL10
H′5: Transmission priority, however switched to relay
priority when TSU FIFO use amount exceeds
the set value of PRISL17 to PRISL10
Others: Setting prohibited
R
Reserved
These bits are always read as 0. The write value
should always be 0.
R/W Sets the threshold value of the port 0 to 1 TSU FIFO
capacity in 64-byte units in the event switching to
relay priority when PRIMD12 to PRIMD10 are set to
H′4 or H′5.
H′00: 0 byte
H′01: 64 bytes
H′02: 128 bytes
:
:
H′5E: 6016 bytes
H′5F: 6080 bytes
Settings are disabled for H′60 to H′FF.
When set to H′00, relay always takes priority. When
the value set is above the port 0 to 1 TSU FIFO
capacity set by the FCM2 to FCM0 in TSU_FCM, if
the PRIMD12 to PRIMD10 are H′4, round robin will
always be set. If the PRIMD12 to PRIMD10 are H′5,
transmission always takes priority.
Rev. 2.00 Dec. 07, 2005 Page 665 of 950
REJ09B0079-0200