PEF20550HV21XT Lantiq, PEF20550HV21XT Datasheet - Page 333

• Manufacturer Part Number: PEF20550HV21XT
• Manufacturer: Lantiq

Specifications of PEF20550HV21XT

• Lead Free Status / Rohs Status: Supplier Unconfirmed

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 hardware timer one maskable (MASK_E) interrupt bit is
provided by the ELIC:
TIN:
Status Register EPIC
STAR_E:
The STAR_E register bits do not generate interrupts and are not modified by reading
STAR_E.
TAC:
5.8.2
To simplify the realization of redundant PCM transmission lines, the ELIC can be
programmed to compare the contents of certain pairs of its PCM input lines. If a pair of
lines carry the same information (normal case), nothing happens. If however the two
lines differ in at least one bit (error case), the ELIC generates an ISTA_E:PIM interrupt
and indicates in the PICM register the pair of input lines and the timeslot number that
caused that mismatch.
The comparison function is carried out between the pairs of physical PCM input lines
RxD0/RxD1 and RxD2/RxD3. It can be activated in all PCM modes, including PCM
mode 0. However, a redundant PCM input line that can be switched over to by means of
the PMOD:AIS1 … 0 bits is of course only available in PCM modes 1 and 2.
Semiconductor Group
PCM Input Comparison
bit 7
bit 7
MAC
TIN
Timer Interrupt; if this bit is set to logical 1, a timer interrupt previously
requested with CMDR_E:ST,TIG = 1 has occurred. The TIN bit is
reset by reading ISTA_E. It should be noted that the interrupt
generation is periodic, i.e. unless stopped by writing to TIMR, the
ISTA_E:TIN will be generated each time the timer expires.
Timer Active; While the timer is running (CMDR:ST=1) the TAC bit is
set to logical 1. The TAC bit is reset to logical 0 after the timer has
been stopped (W:TIMR = XX).
TAC
SFI
®
MFFI
PSS
®
MFTO
MAC
333
read/write reset value:
read
MFAB
PFI
reset value:
MFAE
PIM
Application Hints
MFRW
SIN
00
05
PEB 20550
PEF 20550
H
H
bit 0
bit 0
MFFE
SOV
01.96