XRT84L38IB Exar Corporation, XRT84L38IB Datasheet - Page 305

• Manufacturer Part Number: XRT84L38IB
• Description: Network Controller & Processor ICs 8 Ch T1/E1 Framer
• Manufacturer: Exar Corporation

Specifications of XRT84L38IB

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

REV. 1.0.1
If the Receive Single-Frame Synchronization signal is an output, it should pulse HIGH for one E1 bit period
(488ns) at the last bit position of each E1 frame. By triggering on the HIGH pulse on the Receive Single-frame
Synchronization signal, the Terminal Equipment can identify the end of an E1 frame and should prepare to
accept payload data of the next E1 frame from the framer.
If the Receive Single-Frame Synchronization signal is an input, it should pulse HIGH for one E1 bit period
(488ns) at the first bit position (F-bit) of each E1 frame. By sampling the HIGH pulse of the Receive Single-
frame Synchronization signal, the framer should identity the beginning of an E1 frame and can send out data in
a synchronized way. It is the responsibility of the local Terminal Equipment to align the start of an E1 frame with
the Receive Single-Frame Synchronization pulse.
The Receive Multi-frame Synchronization signal should pulse HIGH for one E1 bit period (488ns) at the last bit
position of Frame number one of an E1 multi-frame. By triggering on the HIGH pulse on the Receive Multi-
frame Synchronization signal, the framer can identify the end of an E1 super-frame and should prepare to
accept payload data of the next E1 super-frame from the framer.
See
Equipment when the Slip Buffer is acted as FIFO.
F
FIFO
IGURE
Figure 85
85. I
NTERFACING
for how to connect the Receive Payload Data Output Interface block to the local Terminal
XRT84L38
Equipment
Terminal
TO LOCAL TERMINAL EQUIPMENT WITH SLIP BUFFER ENABLED OR ACTS AS
RxSerClk_7
RxSer_7
RxMSync_7
RxSync_7
RxTSClk_7
RxTSb[4:0]_7
RxSerClk_0
RxSer_0
RxMSync_0
RxSync_0
RxTSClk_0
RxTSb[4:0]_0
285
Data Input
Data Input
Interface
Interface
Receive
Payload
Receive
Payload
Chn 0
Chn 7
XRT84L38
OCTAL T1/E1/J1 FRAMER
XRT84L38