PEF 20550 H V2.1 Infineon Technologies, PEF 20550 H V2.1 Datasheet - Page 331

• Manufacturer Part Number: PEF 20550 H V2.1
• Description: IC INTERFACE CTRLR PCM MQFP80
• Manufacturer: Infineon Technologies
• Series: ELIC®r

Specifications of PEF 20550 H V2.1

• Function: Line Card Controller
• Interface: ISDN, PCM
• Number Of Circuits: 1
• Voltage - Supply: 5V
• Current - Supply: 15mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 80-SQFP
• Includes: Change Detection, Power-Up Reset Generation
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power (watts): -
• Other names: PEF20550HV2.1XT; PEF20550HV21XP; SP000007794; SP000007795

– Timer to define the last look period for signaling channels at the CFI
Figure 113
Timer Applications
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 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.
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