PEB2085 SIEMENS [Siemens Semiconductor Group], PEB2085 Datasheet - Page 44

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

2.3.3
The standard SLD interface is a three-wire interface with a 512-kHz clock (DCL), an 8-kHz
frame direction signal (TE mode: FSC1/2 output; LT-S/LT-T modes: FSC1 sync input), and a
serial ping-pong data lead (SIP) with an effective full duplex data rate of 256 kbit/s.
The frame is composed of four octets per direction. Octets 1 and 2 contain the two B channels,
octet 3 is a feature control byte, and octet 4 is a signaling byte (figure 17).
The SLD interface can be used in:
– Terminal applications (TE) as a full duplex time-multiplexed (ping-pong) connection to
Figure 17
Connection of B-Channel Sources/Destinations to the ISAC
Mode 0
Semiconductor Group
B-channel sources/destinations.
CODEC filters, such as the SICOFI
SLD compatible voice/data modules may be connected directly to the ISAC-S as depicted
in figure 16. In TE applications timing mode 0 (SPCR:SPM=0) has to be programmed,
hence SLD operates in master mode. Moreover, terminal specific functions have to be
deselected (STCR:TSF=0).
The C system has access to B-channel data, the feature control byte and the signaling byte
via the ISAC-S registers:
– C1R (35
– SFCR and SFCW (34
– SSCR and SSCX (33
The
transmission by means of the Synchronous Transfer Interrupt (STCR) and the BVS-bit
(STAR) (see chapter 2.3.6).
B-Channel Source/Destination
P access to C1R, C2R and SFCR/SFCW must be synchronized to the serial
SLD Compatible
SLD Interface
Voice/Data
Module
H
FSC1/2
), C2R (36
SIP
H
SLD OUT
B1
H
H
)
)
)
B2
512 kbit/s
512
8 kHz
FC
kHz
®
B1/B2
FC
SIG
(PEB 2060) or the ARCOFI (PSB 2160) as well as other
SIG
SLD
B1
44
B2
FC SIG
SLD IN
SIP
DCL
FSC1/2
ISDN Sunscriber Access
®
Functional Description
-S via SLD in Timing
Timing Mode 0
TE Mode
ISAC -S
R
Timing Mode 0
ITS00858
S