7-78
Mindspeed Technologies
28229-DSH-001-B
Registers
CX28224/5/9 Data Sheet
0x413—IMA_ATM_UTOPIA_BUS_CTL (IMA ATM Utopia Bus Control)
This register configures the operation of the ATM side UTOPIA bus and the sample
time of PhyUTxClAv for an IMA group.
0x414—IMA_DIFF_DELAY_ADDR (IMA Differential Delay Control
Address)
This register is used in conjunction with 0x415 to configure the differential delay
operation of the IMA core. Register 0x414 and 0x415 are an indirect register pair in
that a particular IMA group is selected using register 0x414 and the configuration for
that IMA group is programmed using register 0x415.
Bit
Default
Name
Description
7
——
Reserved. Set to 0.
6
0
ATM Address Mode
0 = Utopia Level 2 (multiple addresses)
1 = Utopia Level 1 (single fixed address, no address latching)
5
0
ATMURxSOC Three-
state Disable
0 = ATMURxSOC, ATMURxData[], and ATMURxPrty three-state when not selected
1 = ATMURxSOC, ATMURxData[], and ATMURxPrty do not three-state
4
0
ATMURxClAv Mode
0 = ATMURxClAv is set active for selected channel during cell transfer
1 = ATMURxClAv is set inactive for selected channel during cell transfer
3
0
ATMUTxClAv Last 4
Bytes/Words Mode
0 = ATMUTxClAv is forced inactive/active (based on the state of bit 2) during last
4 bytes/words for selected channel during cell transfer
1 = ATMUTxClAv reflects true cell available status during last 4 bytes/words for
selected channel during cell transfer
2
0
ATMUTxClAv Mode
0 = ATMUTxClAv is set inactive for selected channel during cell transfer
1 = ATMUTxClAv is set active for selected channel during cell transfer
1
0
ClAv Three-state
Disable
0 = ATMURxClAv and ATMUTxClAv threestate when not selected
1 = ATMURxClAv and ATMUTxClAv do not threestate
0
PHYUTxClAv Sample
Time
0 = For an IMA group, sample PhyUTxClAv during an ICP cell to determine SICP rate
1 = For an IMA group, delay sampling PhyUTxClAv until >5 payload byte periods
after an ICP transfer
Bit
Default
Name
Description
7
——
Reserved. Set to 0.
6
0
Control Type
0 = Set Delay Threshold for an IMA group
1 = Set Delay Window for an IMA group
5
——
Reserved. Set to 0.
4
——
Reserved. Set to 0.
3–0
0x0
Group Number
CX28224: 0–1: IMA Group 1–2
CX28225: 0–3: IMA Group 1–4
CX28229: 0–0xF: IMA Group 1–16