pef20550 Infineon Technologies Corporation, pef20550 Datasheet - Page 310

• Manufacturer Part Number: pef20550
• Description: Extended Line Card Interface Controller Elic
• Manufacturer: Infineon Technologies Corporation

Status Register EPIC
STAR_E
The status register STAR_E displays the current state of the MFFIFO and of the monitor
transfer operation. It should be interrogated after an ISTA_E:MFFI interrupt and prior to
accessing the MFFIFO.
The STAR_E register bits do not generate interrupts and are not modified by reading
STAR_E.
MFTO:
MFAB:
MFAE:
MFRW:
MFFE:
Interrupt Status Register EPIC
ISTA_E
The ISTA register should be read after an interrupt in order to determine the interrupt
source. In connection with the monitor handler two maskable (MASK_E) interrupt bits
are provided by the ELIC:
MFFI:
MAC:
Semiconductor Group
bit 7
bit 7
MAC
TIN
MF Channel Transfer in Operation; an MF channel transfer is in
operation (1) or not (0).
MF Channel Transfer Aborted; a logical 1 indicates that the remote
receiver aborted a handshaked message transfer.
MFFIFO Access Enable; the MFFIFO may be either read or written to
(1) or it may not be accessed (0).
MFFIFO Read/Write; if MFAE is set to logical 1 the MFFIFO may be
read (1) or is ready to be written to (0).
MFFIFO Empty; the MFFIFO is empty (1) or not empty (1).
MFFIFO interrupt; if this bit is set to 1, the last MF channel command
(issued by CMDR:MFT1, MFT0) has been executed and the ELIC is
ready to accept the next command. Additional information can be
read from STAR_E:MFTO … MFFE. MFFI is reset by reading
ISTA_E.
Monitor Channel Active Interrupt; this bit set to 1 indicates that the
ELIC has found an active monitor channel. A new search can be
started by reissuing the CMDR:MFSO command. MAC is reset by
reading ISTA_E.
TAC
SFI
®
MFFI
PSS
®
MFTO
read
read
MAC
310
MFAB
PFI
reset value:
reset value:
MFAE
PIM
Application Hints
MFRW
SIN
00
00
PEB 20550
PEF 20550
H
H
bit 0
bit 0
MFFE
SOV
01.96