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CHAPTER 5 SAR FUNCTION
141
ADTF0
Note
ACR decrease time factor.
Time limit for the FRM transmission interval. If the FRM is not transmitted within
this time, the ACR is reduced to the ICR. The ADTF is expressed as follows:
ADTF (milliseconds) = 10*2
ADTF0
This is specified when this VC uses the ABR service.
CDF0
Note
Cutoff decrease factor.
This factor is used to control the decrease of ACR together with the CRM. The
CDF is represented as follows:
CDF = 1/2
CDF0
when CDF0 = 0 to 6
CDF = 0 when CDF0 = 7
This is specified when this VC uses the ABR service.
MBL
Maximum burst size for multicell transfer.
The
μ
PD98405 supports multicell transfer only in PCI bus mode. The maximum
size for multicell transfer is 5 cells. The host must specify the MBL in cell units.
If the MBL is "000" or "001," the multicell transfer function is disabled, and the
μ
PD98405 performs transfer in 1-cell units. If the MBL is either "110" or "111," it
is recognized as being "101" to support transfer in 5-cell units. The MBL must
be "000" for general-purpose bus mode.
CD
Close channel disable.
This is used to indicate that if the CD bit is "1," a Close_Channel command for
this channel cannot be accepted. If the CD bit is set to "1," when the host issues
a Close_Channel command, the response returned is a command indication of a
failure in closing a channel. This bit must initially be set to "0."
LIE
Transmit LECID insert enable.
This bit specifies whether to enable the transmit LECID insert function.
1: Enable
0: Disable
When the transmit LECID insert function is enabled, a value for the LOCAL
LECID field is automatically inserted as an LECID into a transmit packet.
LOCAL LECID
Local LECID.
When the transmit LECID insert function is enabled, a value from this field is
automatically inserted as an LECID into a transmit packet. If the LIE bit is "0,"
this field has no meaning.
A
Active bit.
Indicates whether this VC table is in the active or idle status.
1: Active status
0: Idle status
Note
The fields are used only by the VC which uses the ABR service. These fields must all be reset to "0" if
the ABR bit is "0."