cx28500 Mindspeed Technologies, cx28500 Datasheet - Page 100

• Manufacturer Part Number: cx28500
• Description: Cx28500 Multichannel Synchronous Communications Controller
• Manufacturer: Mindspeed Technologies

Table 6-18.
28500-DSH-002-C
41
40:38
37
36:34
33
32:30
29
28:25
24:20
19:18
17
16
15
14
13
12:4
3
Bit
Field Name
RxCHABT/
RxSPORT/
PROGERR
PRT [4:0]
RxCOFA/
RxFREC/
RxBUFF/
RxCHIC/
TxRSVD
TxRSVD
PRTDIR
TxRSVD
TxRSVD
TxBUFF
RxSHT/
TxCOFA
RxOOF/
TxEOM
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
CREC
Non-DMA Interrupt Descriptors Format (2 of 3)
Value
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Receive or Transmit Buffer Errors
The data is lost. CX28500 has no place to read or write data internally. If reported as TxBUFF, the internal
buffer underruns. If reported as RxBUFF, the internal buffer overflows.
Reserved.
RxSHT—Receive direction message too short or other error causes a truncated message.
The error is generated when the received message length (after zero extraction in HDLC mode) is less
than or equal to the number of bits in FCS field. The message data is not transferred to shared memory.
TxEOM—Transmit direction End Of Message.
Reserved.
RxCHABT—Receive direction Change to Abort code.
The event is generated when a received pad fill code changes from 7Eh to 7Fh (15 consecutive 1s are
detected).
Transmit: reserved
Reserved.
RxCHIC—Receive direction Change to Idle Code (RxCHIC).
The event is generated when a received pad fill code changes from 7Fh to 7Eh, or upon the detection of
the first flag after channel activation.
Transmit: reserved.
Reserved.
The port number causing the interrupt.
Reserved.
0: Receive direction of port causing the interrupt.
1: Transmit direction of port causing the interrupt.
Receive and Transmit Change Of Frame Alignment.
RxOOF—Receive direction Out Of Frame.
Generated when serial port is configured in channelized mode and Receiver-Out-Of-Frame (ROOF) input
signal assertion is detected.
Transmit: reserved.
RxFREC—Receive direction.
When ROOF signal deasserts, frame recovery (FREC) interrupt is generated. The serial port transitions
from Out-Of-Frame (OOF) back to in-frame.
RxSPORT—Receive Direction.
When ROOF signal is used as a general serial port interrupt line (SPORT).
If OOFABT=0 and OOFIEN=1 bit fields in RSIU Port Configuration register and ROFF transitions from
high-to-low, the SPORT Interrupt is generated. The data stream processing is not affected.
Transmit–Reserved.
COFA recovery—Generated when the internal COFA signal deasserts. The serial port transitions from
COFA back to in-frame.
Reserved.
Reports a programming error: an attempt was made to perform a SRQ access to an illegal address within
CX28500. An illegal address is any address which is not defined in
only valid when SACK = 1.
Mindspeed Proprietary and Confidential
Mindspeed Technologies
®
Description
Table
Memory Organization
6-2. Reports status of SACK,
85