CS61884-IQZ Cirrus Logic Inc, CS61884-IQZ Datasheet - Page 23

• Manufacturer Part Number: CS61884-IQZ
• Description: IC,PCM TRANSCEIVER,OCTAL,CEPT PCM-30/E-1,QFP,144PIN,PLASTIC
• Manufacturer: Cirrus Logic Inc

Specifications of CS61884-IQZ

• Rohs Compliant: YES

8. BUILDING INTEGRATED TIMING SYSTEMS (BITS) CLOCK MODE
This mode is used to enable one or more channels
as a stand-alone timing recovery unit used for
G.703 Clock Recovery.
In hardware mode, BITS Clock mode is selected by
pulling the MUX pin “HIGH”. This enables only
channel zero as a stand-alone timing recovery unit,
no other channel can be used as a timing recovery
unit.
DS485F1
RPOS
RNEG
RCLK
TPOS
TNEG
TCLK
One Channel
LOOPBACK
RCLK
RNEG
RPOS
RCLK
RNEG
RPOS
CS61884
REMOTE
Figure 5. G.703 BITS Clock Mode in Remote Loopback
Figure 4. G.703 BITS Clock Mode in RZ Mode
One Receiver
Figure 3. G.703 BITS Clock Mode in NRZ Mode
One Receiver
CS61884
CS61884
RRING
TRING
RTIP
TTIP
RRING
RRING
0 .1 µ F
RTIP
RTIP
0 .1 µ F
0 .1 µ F
In host mode, each channel can be setup as an inde-
pendent G.703 timing recovery unit, through the
Bits Clock Enable Register (1Eh)
14.31 on page 41), setting the desired bit to “1” en-
ables BITS Clock mode for that channel. The fol-
lowing diagrams show how the BITS clock
function operates.
R1
R2
R1
R2
R1
R2
T1 1:2
T1 1:2
T1 1:2
T1 1:2
TRANMIT
RECEIVE
LINE
LINE
RECEIVE
RECEIVE
LINE
LINE
CS61884
(See Section
23