MPC8280 datasheet(1009/1386 Pages) FREESCALE

1009 / 1386 page

ATM Controller and AAL0, AAL1, and AAL5

MPC8280 PowerQUICC II Family Reference Manual, Rev. 1

Freescale Semiconductor

31-49

31.10.2.2.4

AAL0 Protocol-Specific RCT

Figure 31-29 shows the layout for the AAL0 protocol-specific RCT.

Table 31-20 describes AAL0 protocol specific RCT fields.

0x18

0–3

—

Reserved, should be cleared.

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.

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.

Offset + 0x0E

—

INVE

—

Offset + 0x10

—

Offset + 0x12

Offset + 0x14

Offset + 0x16

Offset + 0x18

—

RXBM

—

Figure 31-29. AAL0 Protocol-Specific RCT

Table 31-20. 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.

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 31-19. AAL1 Protocol-Specific RCT Field Descriptions (continued)

Offset

Bits

Name

Description

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