Motorola MPC8260 User Manual

29-50

MOTOROLA

29.10.2.2.4  AAL0 Protocol-SpeciÞc RCT 
Figure 29-29 shows the layout for the AAL0 protocol-speciÞc RCT. 

Table 29-20 describes AAL0 protocol speciÞc RCT Þelds.

0x18

0Ð3

Ñ

Reserved, should be cleared.

4

SNEM

Sequence number error ßag 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).

5Ð7

Ñ

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.

9Ð15

Ñ

Reserved, should be cleared.

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

Offset + 0x0E

Ñ

0

1

INVE

Ñ

Offset + 0x10

Ñ

Offset + 0x12

Offset + 0x14

Offset + 0x16

Offset + 0x18

Ñ

RXBM

Ñ

0x0E

0-7

Ñ

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

Ñ

Reserved, should be cleared. 

0x10

Ñ

Ñ

Reserved, should be cleared.