Rainbow Electronics DS26519 User Manual
Page 26
DS26519 16-Port T1/E1/J1 Transceiver
26 of 310
NAME PIN
TYPE
FUNCTION
RSYNC1 F9
RSYNC2 E13
RSYNC2 T7
RSYNC2 W3
RSYNC5 W9
RSYNC6 AB9
RSYNC7 A19
RSYNC8 Y19
RSYNC9 N19
RSYNC10 P17
RSYNC11 V5
RSYNC12 L7
RSYNC13 L6
RSYNC14 L5
RSYNC15 E15
RSYNC16 R18
Input/
Output
Receive Synchronization.
If the receive-side elastic store is enabled, this signal
is used to input a frame or multiframe boundary pulse. If set to output frame
boundaries, RSYNCn can be programmed to output double-wide pulses on
signaling frames in T1 mode. In E1 mode, RSYNCn out can be used to indicate
CAS and CRC-4 multiframe. The DS26519 can accept an H.100-compatible
synchronization signal. The default direction of this pin at power-up is input, as
determined by the RSIO control bit in the
.2 register.
RMSYNC1/
RFSYNC1
C13
RMSYNC2/
RFSYNC2
C15
RMSYNC3/
RFSYNC3
V7
RMSYNC4/
RFSYNC4
T9
RMSYNC5/
RFSYNC5
T13
RMSYNC6/
RFSYNC6
U13
RMSYNC7/
RFSYNC7
D16
RMSYNC8/
RFSYNC8
W21
RMSYNC9/
RFSYNC9
T21
RMSYNC10/
RFSYNC10
V22
RMSYNC11/
RFSYNC11
V6
RMSYNC12/
RFSYNC12
H4
RMSYNC13/
RFSYNC13
G1
RMSYNC14/
RFSYNC14
K4
RMSYNC15/
RFSYNC15
F15
RMSYNC16/
RFSYNC16
N17
Output
Receive Multiframe/Frame Synchronization 1 to 16.
A dual function pin to
indicate frame or multiframe synchronization. RFSYNCn is an extracted 8kHz
pulse, one RCLKn wide that identifies frame boundaries. RMSYNCn is an
extracted pulse, one RCLKn wide (elastic store disabled) or one RSYSCLKn wide
(elastic store enabled), that identifies multiframe boundaries. When the receive
elastic store is enabled, the RMSYNCn signal indicates the multiframe sync on
the system (backplane) side of the elastic store. In E1 mode, this pin can indicate
either the CRC-4 or CAS multiframe as determined by the RSMS2 control bit in
the Receive I/O Configuration register (
.1).