DS26334_07 Datasheet, PDF (12/121 Pages) Dallas Semiconductor – 3.3V, 16-Channel, E1/T1/J1 Shortand Long-Haul Line Interface Unit

DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
NAME
PIN TYPE
FUNCTION
TCLK1
F5
TCLK2
G4
TCLK3
G9
TCLK4
H6
TCLK5
M7
TCLK6
L8
Transmit Clock for Channels 1–16. The transmit clock has to be
1.544MHz for T1 or 2.048MHz for E1 mode. TCLKn is the clock used
to sample the data TPOS/TNEG or TDAT on the falling edge. The
expected TCLK can be inverted.
TCLK7
L10
If TCLKn is ‘high’ for 16 or more MCLKs, then transmit all ones
TCLK8
TCLK9
P9
K11
I
(TAOs) is sent to the line side of the corresponding transmit channel.
When TCLKn starts clocking again, normal operation will begin again
TCLK10
K12
for the corresponding transmit channel.
TCLK11
F14
TCLK12
E12
TCLK13
C11
TCLK14
D12
If TCLKn is ‘low’ for 64 or more MCLKs, then the corresponding
transmit channel on the line side will power-down and be put into high
impedance. When TCLKn starts clocking again the corresponding
transmit channel will power-up and come out of high impedance.
TCLK15
N7
TCLK16
D11
RPOS1/RDATA1
F4
RPOS2/RDATA2
F3
RPOS3/RDATA3
L3
Receive Positive Data Output for Channels 1–16. In dual-rail mode
RPOS4/RDATA4
L4
RPOS5/RDATA5
K8
RPOS6/RDATA6
M9
RPOS7/RDATA7
P8
the NRZ data output indicates a positive pulse on RTIP/RRING. Upon
detecting an LOS, AIS can be inserted if the AISEL bit in the GC
(0Fh) register is set; otherwise, the pins will be active. AIS insertion
can also be controlled on an individual LIU basis by the IAISEL (05h)
register. If a given receiver is in power-down mode, the associated
RPOS8/RDATA8 M12
O,
RPOS pin is high impedance.
RPOS9/RDATA9 M14 ^tri-state
RPOS10/RDATA10 K13
Receive Data Output for Channels 1–16. In single-rail mode, NRZ
RPOS11/RDATA11 G12
data is sent out on this pin. If a given receiver is in power-down mode,
RPOS12/RDATA12 E14
the associated RPOS pin is high impedance.
RPOS13/RDATA13 C12
RPOS14/RDATA14 C10
Note: During an LOS condition, the RPOS/RDATA outputs remain
active.
RPOS15/RDATA15 C8
RPOS16/RDATA16 E5
RNEG1/CV1
E3
RNEG2/CV2
G5
RNEG3/CV3
K4
Receive Negative Data Output for Channels 1–16. In dual-rail
RNEG4/CV4
M3
mode the NRZ data output indicates a negative pulse on
RNEG5/CV5
L7
RTIP/RRING. Upon detecting a LOS, AIS can be inserted if AISEL bit
RNEG6/CV6
RNEG7/CV7
RNEG8/CV8
RNEG9/CV9
M10
in the GC register is set; otherwise, the pins will be active. AIS
P11
insertion can also be controlled on an individual LIU basis by IAISEL
K10
O,
register. If a given receiver is in power-down mode, the associated
M13 ^{tri-state RNEG pin is high impedance.}
RNEG10/CV10
L14
RNEG11/CV11
F13
Code Violation for Channels 1–16. In single-rail mode, bipolar
violation, code violation, and excessive zeros are reported on CVn. If
RNEG12/CV12
F11
HDB3 or B8ZS is not selected, this pin indicates only BPVs. If a given
RNEG13/CV13
E10
receiver is in power-down mode, the associated CV pin is high
RNEG14/CV14
C9
impedance.
RNEG15/CV15
C7
RNEG16/CV16
J3
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