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CHAPTER 5 SAR FUNCTION
177
MB
Mailbox.
Select a mailbox to store the receive indication in this VC.
1: Mailbox 1
0: Mailbox 0
POOL NO.
Pool number.
Select one of the 32 pools for this VC.
UINFO/LECID
User information/receive LECID.
If the RLI bit of the receive VC table is set to "0," this field contains user information.
The user can set any pattern in this field. The
μ
PD98405 transmits this pattern in a
receive indication. If the RLI bit of the receive VC table is "1," the
μ
PD98405 uses this
field to store the LECID for a received packet. In this case, the user cannot use this
field for user information. Also, the user cannot use UINFO for the OAM/RM/Reserved
cell received by the same VC.
EIS
Early interrupt size.
To enable the use of the early interrupt function, it is necessary to set the size, in cell
units, in this field. The
μ
PD98405 informs the host when it has received the number of
cells specified in the EIS field, using an early interrupt. Resetting the EIS field to 000
disables the early interrupt function.
MAX. NO. OF
SEGMENTS
The maximum number of segments (48-byte payload of the receive cell) that can be
contained in one packet.
This field sets the maximum number of segments that can be contained in the packet
received by this VC. If the last cell of the packet is not received, despite the current
number of segments of the received packet reaching the number of segments set in
this field, receive indication including an error status is issued immediately.
T1D
Disable T1 timer.
This bit is used to disable the T1 timer function of this VC.
1: Disable
0: Enable
RE
Note
Enable rate calculation/turn-around processing based on RM cell reception.
When an BRM/FRM cell is received for this VC, this bit is used to specify whether to
perform rate calculation/turn-around processing. If the RE bit is set to "0," the
μ
PD98405 does not perform rate calculation/turn-around processing or access the
transmit VC table indicated by the Tx VC TABLE POINTER. This bit is set to enable
the use of the ABR service by this VC.
Note
These fields are used only by a VC which uses the ABR service. These fields must all be reset to
"0" if the ABR bit is set to "0".