Freescale Semiconductor MPC8260 - Manual (Page 969)

ATM Controller and AAL0, AAL1, and AAL5
MPC8260 PowerQUICC II Family Reference Manual, Rev. 2
Freescale Semiconductor 30-49
30.10.2.2.4 AAL0 Protocol-Specific RCT
Figure 30-29 shows the layout for the AAL0 protocol-specific RCT.
Table 30-20 describes AAL0 protocol specific RCT fields.
0x18 0–3 — Reserved, should be cleared.
4 SNEM Sequence number error flag interrupt mask
0 This mode is disabled.
1 When an out-of-sequence error occurs, an RXB interrupt is sent to the interrupt
queue even if RCT[RXBM] is cleared. Note that this mode is the buffer error
reporting mechanism during automatic data forwarding (ATM-to-TDM bridging)
when no buffer processing is required (RCT[RXBM]=0).
5–7 — Reserved, should be cleared.
8 RXBM Receive buffer interrupt mask
0 The receive buffer event of this channel is disabled. (The event is not sent to the
interrupt queue.)
1 The receive buffer event of this channel is enabled.
9–15 — Reserved, should be cleared.
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Offset + 0x0E — 0 1 INVE —
Offset + 0x10 —
Offset + 0x12
Offset + 0x14
Offset + 0x16
Offset + 0x18 — RXBM —
Figure 30-29. AAL0 Protocol-Specific RCT
Table 30-20. AAL0-Specific RCT Field Descriptions
Offset Bits Name Description
0x0E 0-7 — Reserved, should be cleared.
8-9 0b01 Must be programmed to 0b01 for AAL0.
10 INVE Inverted empty.
0 RxBD[E] is interpreted normally (1 = empty, 0 = not empty).
1 RxBD[E] is handled in negative logic (0 = empty, 1 = not empty).
11-15 — Reserved, should be cleared.
0x10 — — Reserved, should be cleared.
Table 30-19. AAL1 Protocol-Specific RCT Field Descriptions (continued)
Offset Bits Name Description