Section 21 Ethernet Controller Direct Memory Access Controller (E-DMAC)
Rev. 1.00 Mar. 12, 2008 Page 798 of 1178
REJ09B0403-0100
21.2.6
EtherC/E-DMAC Status Register (EESR)
EESR is a 32-bit readable/writable register that shows communications status information on the
E-DMAC in combination with the EtherC. The information in this register is reported in the form
of interrupts. Individual bits are cleared by writing 1 (however, bit 22 (ECI) is a read-only bit and
not to be cleared by writing 1) and are not affected by writing 0. Each interrupt source can also be
masked by means of the corresponding bit in the EtherC/E-DMAC status interrupt permission
register (EESIPR).
The interrupts generated by this register are EINT0. For interrupt priority, see section 5.5,
Interrupt Exception Handling Vector Table.
Bit Bit
Name
Initial
value
R/W Description
31
0
R
Reserved
This bit is always read as 0. The initial value should
not be changed.
30 TWB 0 R/W
Write-Back
Complete
Indicates that write-back from the E-DMAC to the
corresponding descriptor has completed. This
operation is enabled when the TIS bit in TRIMD is set
to 1.
0: Write-back has not completed, or no transmission
directive
1: Write-back has completed
29 to 27
All
0
R
Reserved
These bits are always read as 0. The initial value
should not be changed.
26
TABT
0
R/W
Transmit Abort Detection
Indicates that the EtherC aborts transmitting a frame
because of failures during transmitting the frame.
0: Frame transmission has not been aborted or no
transmit directive
1: Frame transmit has been aborted
Summary of Contents for H8S Family
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Page 70: ...Section 1 Overview Rev 1 00 Mar 12 2008 Page 22 of 1178 REJ09B0403 0100...
Page 108: ...Section 2 CPU Rev 1 00 Mar 12 2008 Page 60 of 1178 REJ09B0403 0100...
Page 116: ...Section 3 MCU Operating Modes Rev 1 00 Mar 12 2008 Page 68 of 1178 REJ09B0403 0100...
Page 152: ...Section 5 Interrupt Controller Rev 1 00 Mar 12 2008 Page 104 of 1178 REJ09B0403 0100...
Page 206: ...Section 6 Bus Controller BSC Rev 1 00 Mar 12 2008 Page 158 of 1178 REJ09B0403 0100...
Page 420: ...Section 9 14 Bit PWM Timer PWMX Rev 1 00 Mar 12 2008 Page 372 of 1178 REJ09B0403 0100...
Page 476: ...Section 12 Watchdog Timer WDT Rev 1 00 Mar 12 2008 Page 428 of 1178 REJ09B0403 0100...
Page 552: ...Section 14 CRC Operation Circuit CRC Rev 1 00 Mar 12 2008 Page 504 of 1178 REJ09B0403 0100...
Page 712: ...Section 18 I2 C Bus Interface IIC Rev 1 00 Mar 12 2008 Page 664 of 1178 REJ09B0403 0100...
Page 804: ...Section 19 LPC Interface LPC Rev 1 00 Mar 12 2008 Page 756 of 1178 REJ09B0403 0100...
Page 838: ...Section 20 Ethernet Controller EtherC Rev 1 00 Mar 12 2008 Page 790 of 1178 REJ09B0403 0100...
Page 964: ...Section 24 RAM Rev 1 00 Mar 12 2008 Page 916 of 1178 REJ09B0403 0100...
Page 1066: ...Section 25 Flash Memory Rev 1 00 Mar 12 2008 Page 1018 of 1178 REJ09B0403 0100...
Page 1098: ...Section 26 Boundary Scan JTAG Rev 1 00 Mar 12 2008 Page 1050 of 1178 REJ09B0403 0100...
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