PEB2085 SIEMENS [Siemens Semiconductor Group], PEB2085 Datasheet - Page 45

• Manufacturer Part Number: PEB2085
• Description: ISDN SubscribernAccess Controller
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

– Digital exchange applications (LT-S/LT-T) as a full duplex time-multiplexed connection to
Figure 18
Connection of the ISAC
Controller via SLD, in Timing Mode 1
The C system has access to B-channel data via the ISAC-S registers:
– C1R (35
The P access to C1R and C2R must be synchronized to the serial transmission by means of
Synchronous Transfer Interrupt (STCR) and the BVS bit (STAR) (see chapter 2.3.6).
Semiconductor Group
convey the B channels between the S/T interface and a Peripheral Board Controller (e.g.
PBC PEB 2050 or PIC PEB 2052), which performs time-slot assignment on the PCM
highways, forming a system interface to a switching network (figure 18).
Timing mode 1 (SPCR:SPM=1) has to be programmed, hence SLD operates in slave mode.
S
H
LT-S/LT-T
), C2R (36
FSC
ISAC -S
Mode 1
Timing
2
FSC1
FSD
SIP
R
H
FSD
)
®
FSC
-S as B-Channel Source/Destination to a Peripheral Board
SLD OUT
DCL
B1
SIP
1
B2
512 kbit/s
512
B1/B2
1/8 Frame Period
8 kHz
FC
kHz
SIG
SLD
B1
45
B2
FC SIG
SLD IN
SIPX
SCL
SYP
CLK
PBC
Functional Description
System Interface
PCM Highway
ITS00859