Rainbow Electronics DS2151Q - Manual (Page 3)

BPV COUNTER
SYNCHRONIZER
ALARM DETECTION
LOOP CODE DETECTOR
CRC/FRAME ERROR COUNT
ONE’S DENSITY MONITOR
SIGNALING EXTRACTION
PAYLOAD LOOPBACK
ELASTIC ST
ORE
RECEIVE SIDE
FRAMER
RLOS
RLINK RLCLK RCHBLK RCHCLK RSER SYSCLK RSYNC
B8ZS DECODER
CHANNEL MARKING
B8ZS ENCODE
YELLOW ALARM GEN.
FDL INSERTION
CRC GEN.
F–BIT INSERTION
ONE’S DENSITY ENCODER
LOOP CODE GEN.
AIS GEN.
CLEAR CHANNEL
SIGNALING INSERTION
IDLE CODE INSERTION
TRANSMIT
SIDE FORMA
TTER
ELASTIC ST
ORE
TSER RCLK
MUX
LOSS OF
TCLK
DETECT
TIMING
CONTROL
TSYNC TCHCLK TCHBLK
FRAMER LOOPBACK
REMOTE LOOKPACK
JITTER ATTENUATION MUX
(CAN BE PLACED IN EITHER THE TRANSMIT
OR RECEIVE PATHS)
LOCAL LOOPBACK
CLOCK/
DA
T
A
RECOVER
Y
WA
V
E
SHAPING
PEAK CSU
FIL
TERS
DETECT
FIL
TER
LINE
DRIVERS
XT
AL/VCO/PLL
P
ARALLEL
CONTROL
POR
T
(ROUTED T
O
ALL
BLOCKS)
TRING
TTIP R
TIP
RRING
ACLKI
XT
AL1
XT
AL2
24.7 MHz
BTS
CS
WR(R/W)
RD(DS)
ALE(AS)
AD0–AD7
INT1/INT2
TCLK
TIMING
CONTROL
FDL
EXTRACTION
FDL
INSER
T
LOGIC
TLINK TLCLK
DS2151Q
022697 3/46
DS2151Q BLOCK DIAGRAM Figure 1–1