HD6417618 RENESAS [Renesas Technology Corp], HD6417618 Datasheet - Page 337

• Manufacturer Part Number: HD6417618
• Description: 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7618 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

1.
2.
3.
4.
5.
TC: EESR frame transmission complete
After setting the corresponding transmit
descriptor, set the TR bit in EDTRR to 1.
: Processing added as the countermeasure for the problem
Read the TACT bit of the corresponding
transmit descriptor.
After setting the transmit descriptor,
set the TR bit in EDTRR to 1.
Prepare multiple transmit descriptors.
Next transmission task
generated?
Transmission starts.
Transmission task
TACT = 0?
Yes
Yes
Figure 12.10 Method of Adding Timeout Processing
No
No
Section 12 Ethernet Controller Direct Memory Access Controller (E-DMAC)
4.
Place the transmission task in a waiting
state by calling an OS service routine
with a timeout function.
End
Has the transmission
task left the waiting state
within the specified time?
Yes
No
Rev. 6.00 Jun. 12, 2007 Page 305 of 610
6.
Read the TACT bit of the corresponding
transmit descriptor.
Make an OS service call to bring the
transmission task out of the waiting state.
Generation of EtherC/E-DMAC
interrupt
Interrupt processing for interrupts
other than TC
Save EESR and clear the bit
by writing a 1.
Timeout
Interrupt other than TC?
TACT = 0?
Interrupt handler
TC interrupt?
Yes
End
REJ09B0131-0600
Yes
Yes
No
No
No