pef20550 Infineon Technologies Corporation, pef20550 Datasheet - Page 331

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

5.8
5.8.1
Hardware Timer
The ELIC provides a programmable hardware timer which can be used for three
purposes:
– General purpose timer for continuously interrupting the P at programmable time
– Timer to define the last look period for signaling channels at the CFI
– Timer to define the FSC multiframe generation at the CFI (CMD2:FC2 … 0 = 111,
Normally in a system only one of these functions is required and therefore active at a
time. However, it is also possible to have any combination of these functions active, if it
is acceptable that all three applications use the same timer value.
The timer period can be selected from 250 s up to 32 ms in increments of 250 s.
Figure 113
Timer Applications
Semiconductor Group
intervals.
(see chapter 5.5.1).
see chapter 5.2.2.3).
Timer Start
CMDR : ST = 1
(CMDR : TIG = 1)
T = (TVAL6...0 + 1) x 250 µs
LL : Last Look
Supervision Functions
Hardware Timer
T
(ISTA : TIN)
LL Sampling
Multifr. Sync.
331
T
(ISTA : TIN)
LL Sampling
Multifr. Sync.
Application Hints
Timer Stop
TIMR = XX
ITD08093
PEB 20550
PEF 20550
01.96