cx28560 Mindspeed Technologies, cx28560 Datasheet - Page 108

• Manufacturer Part Number: cx28560
• Description: Hdlc Controller
• Manufacturer: Mindspeed Technologies

The CX28560 Memory Organization
Table 5-17. Non-BUFFC Interrupt Descriptors Format (2 of 2)
5-18
Field
12:4
Bit
13
3
2
1
0
RXCREC/TXCREC
RSVD
SACK STATUS
SACK
PERR
ILOST
Name
Value
—
—
0
0
1
0
1
0
1
Receive: COFA recovery.
---------------
Transmit: COFA recovery.
Set to one when serial port transitions from COFA back to in-frame.
Reserved
SACK status bit. Only valid if the SACK bit is asserted.
No error on exit.
Service Acknowledge Error occurred. An attempt was made to access an illegal
address. An illegal address is one that is not defined in any of the memory map
registers.
BUFFC service acknowledge.
Set to one at conclusion of host service, which was processed successfully. In case of
an error being executed as a result of a host service, other interrupts may be
generated – PERR, for example.
No PCI parity errors have been detected.
PCI Bus Parity Error.
Generated when the CX28560 detects a parity error on data being transferred into the
CX28560 either from another PCI agent writing into the CX28560 or from the
CX28560 reading from shared memory. This error is specific to the data phase (non-
address cycle) of a PCI transfer while the CX28560. PCI system error signal, SERR*,
is ignored by the CX28560. To mask the PERR interrupt, the CX28560's PCI
Configuration Space, Function 0, Register 1, Parity Error Response field must be set
to 0.
No interrupts have been lost.
Interrupt Lost.
Generated when internal interrupt queue is full and more interrupt conditions are
detected. As the CX28560 has no way to store the newest interrupt descriptors, it
discards the new interrupts and overwrites this bit in the last interrupt in an internal
queue prior to that interrupt being transferred out to shared memory. The integrity of
the descriptor being overwritten is maintained completely.
Mindspeed Technologies™
Advance Information
Description
CX28560 Data Sheet
28560-DSH-001-B