Rainbow Electronics DS2154 - Manual (Page 7)

DS2154
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PIN DESCRIPTION TYPE SYMBOL
79 RLCLK O Receive Link Clock.
80 DVSS – Digital SIgnal Ground.
81 DVDD – Digital Positive Supply.
82 RCLK O Receive Clock.
83 DVDD – Digital Positive Supply.
84 DVSS – Digital Signal Ground.
85 RDATA O Receive Data.
86 RPOSI I Receive Positive Data Input.
87 RNEGI I Receive Negative Data Input.
88 RCLKI I Receive Clock Input.
89 RCLKO O Receive Clock Output.
90 RNEGO O Receive Negative Data Output.
91 RPOSO O Receive Positive Data Output.
92 RCHCLK O Receive Channel Clock.
93 RSIGF O Receive Signaling Freeze Output.
94 RSIG O Receive Signaling Output.
95 RSER O Receive Serial Data.
96 RMSYNC O Receive Multiframe Sync.
97 RFSYNC O Receive Frame Sync.
98 RSYNC I/O Receive Sync.
99 RLOS/LOTC O Receive Loss Of Sync / Loss Of Transmit Clock.
100 RSYSCLK I Receive System Clock.
NOTE:
Leave all no connect (NC) pins open circuited.
DS2154 PIN DESCRIPTION Table 1–2
TRANSMIT SIDE DIGITAL PINS
Transmit Clock [TCLK]. A 2.048 MHz primary clock.
Used to clock data through the transmit side formatter.
Must be present for the parallel control port to operate
properly. If not present, the Loss Of Transmit Clock
(LOTC) function can provide a clock.
Transmit Serial Data [TSER]. Transmit NRZ serial
data. Sampled on the falling edge of TCLK when the
transmit side elastic store is disabled. Sampled on the
falling edge of TSYSCLK when the transmit side elastic
store is enabled.
Transmit Channel Clock [TCHCLK]. A 256 KHz clock
which pulses high during the LSB of each channel. Syn-
chronous with TCLK when the transmit side elastic
store is disabled. Synchronous with TSYSCLK when
the transmit side elastic store is enabled. Useful for par-
allel to serial conversion of channel data.
Transmit Channel Block [TCHBLK]. A user program-
mable output that can be forced high or low during any of
the 32 E1 channels. Synchronous with TCLK when the
transmit side elastic store is disabled. Synchronous
with TSYSCLK when the transmit side elastic store is