MT9074
Advance Information
Bit Name
Functional Description
Bit
Name
Functional Description
7
T1/E1
T1/E1 mode selection. when this
bit is zero, the device is in T1
mode. When set high, the device
is in E1 mode.
7
RSV Reserved. Must be kept high for
normal operation.
6-4 RSV Reserved. Must be kept low for normal
operation.
6-5
4
RSV
Reserved. Must be kept at 0 for
normal operation.
3
CPL Custom Pulse Level. Setting this bit
low enables the internal ROM values in
generating the transmit pulses. The
ROM is coded for different line
terminations or build out, as specified
in the LIU Control word. Setting this bit
high disables the pre-programmed
pulse templates. Each of the 4 phases
that generate a mark derive their D/A
LIUEn
LIU Enable. Setting this bit low
enables the internal LIU front-end.
Setting this pin high disables the
LIU. Digital inputs RXA and RXB
are sampled by the rising edge of
E1.5i (C1.50) to strobe in the
received line data. Digital transmit
data is clocked out of pins TXA
and TXB with the rising edge of
C1.5o
coefficients
from
the
values
programmed in the CPW registers.
2-0 RSV Reserved. Must be kept at 0 for normal
3-2
1
RSV
Reserved. Must be kept at 0 for
normal operation.
operation.
Table 39 - Custom Tx Pulse Enable
(Page 2, Address 11H) (T1)
ADSEQ Digital Milliwatt or Digital Test
Sequence. If one, the Alaw digital
milliwatt analog test sequence will
be selected for those channels
with per time slot control bits
TTST, RRST set. If zero, a PRBS
Bit Name
Functional Description
7
RSV Reserved. Must be kept low for normal
generator
/
detector will be
operation.
connected to channels with TTST,
RRST respectively.
6-0 CP6-0 Custom Pulse. These bits provide the
capability for programming the
0
RSV
Reserved. Must be kept at 0 for
normal operation.
magnitude setting for the TTIP/TRING
line driver A/D converter during the first
phase of a mark. The greater the
binary number loaded into the register,
the greater the amplitude driven out.
This feature is enabled when the
control bit 3 - CPL of the Custom Tx
Pulse Enable Register - address 11H
of Page 2 is set high.
Table 38 - Configuration Control Word
(Page 2, Address 10H) (T1)
Table 40 - Custom Pulse Word 1
(Page 2, Address 1CH) (T1)
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