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CHAPTER 5 SAR FUNCTION
230
Command description
Using the Set_Rx_Congestion command, the host forcibly sets the CI and NI bits of a BRM cell, sent back
from any channel, for testing purposes. When the Set_Rx_Congestion command is issued, the
μ
PD98405
ORs the CI and NI bits of the command with the CI and NI bits of a BRM cell, and sets the result of ORing
in the CI and NI bits of the BRM cell to be sent back. Once this command has been issued, it remains
effective until it is cleared. To clear the function of this command, it is necessary to issue another
Set_Rx_Congestion command with the CI and NI bits reset to 0.
(2) BRM_Tx command (for testing)
Command register programming
CMR
CER
Parameter description
VC NUMBER:
Number of a transmit VC used to transmit an out-of-rate BRM cell
CI:
CI bit of a BRM cell
NI:
NI bit of a BRM cell
EN:
Enable ER field
1: Enable
0: Disable
ER:
ER field of a BRM cell (explicit rate)
Command description
The BRM_Tx command is a test command used for transmitting one out-of-rate BRM cell (non-turn-around
BRM cell). Once the BRM_Tx command has been issued, the
μ
PD98405 transmits one out-of-rate BRM
cell from the receive VC specified in the VC NUMBER field. The contents of this BRM cell are prepared
based on the parameters specified in the CER. If the EN bit indicates "disable," the ER value that the
μ
PD98405 saves for the receive VC when the command is issued is set in the ER field. If the EN bit
indicates "enable," a value in the ER field specified in the CER is set in the ER field.
0
31
- 0 -
4
19
1
25
3
- 0 -
0
- 0 -
1
1
29
1
26
30
0
31
ER
24
18
VC NUMBER
EN
16 15
CI NI
18
- 0 -
17
19