MT9075B
Preliminary Information
Bit
Name
Functional Description
Unused.
Bit
Name
Functional Description
7
6
---
7
ODE
(0)
Output Data Enable. If one, the
DSTo and CSTo output drivers
function normally. When low, DSTo
and CSTo will be tristated.
PRBSO PRBS
Interrupt.
(PRBSO
Counter
Overflow
unmasked
When
(0)
=
1), an interrupt is
Note: When ODE =1, DSTo and
CSTo can be individually tristated
by DSToDE and CSToDE (page
01H, address 16H) respectively.
initiated on overflow of PRBS
counter (page 04H, address 10H)
from FFH to 0H. Interrupt vector =
00000010.
6
SPND Suspend Interrupts. If one, the
5
4
PRBSI PRBS Interrupt. When unmasked
IRQ output (pin 12 in PLCC, 85 in
MQFP) will be in a high-impedance
state and all interrupts will be
ignored. If zero, the IRQ output will
function normally.
(0)
(PRBSI = 1), an interrupt is initiated
on a single PRBS detection error.
Interrupt vector = 00000010.
(0)
S nibI Changed
S
Nibble Interrupt.
a
a
When unmasked (S nibI = 1), an
(0)
a
5
4
INTA
(0)
Interrupt Acknowledge. A zero-to-
one or one-to-zero transition will
clear any pending interrupt and
make IRQ high.
interrupt
detection of a change of state in any
of received S nibbles (nibble S ,
is
generated
upon
a
a5
nibble S , nibble S or nibble S ).
a6
a7
a8
Interrupt vector = 00000010.
TxCCS Transmit
Common
Channel
Signalling. If one, the transmit
section of the device is in common
channel signalling (CCS) mode. If
zero, it is in Channel Associated
Signalling (CAS) mode.
(0)
3
2
1
0
S bitI Changed S Bit Interrupt. When
a
a
unmasked (S bitI = 1), an interrupt
is generated upon detection of a
change of state in any of received
(0)
a
S
bits (S , S , S
or S ).
a
a5
a6
a7 a8
Interrupt vector = 00000010.
3
RPSIG Register
Programmed
Signalling. If one, the transmit CAS
signalling will be controlled by
programming page 05H. If zero, the
transmit CAS signalling will be
controlled through the CSTi stream.
(0)
C8S I Eight Consecutive S
Nibble
a6
a6
Interrupt. When unmasked (C8S I
= 1), an interrupt is generated upon
detection of the eighth consecutive
(0)
a6
S
nibble with the same pattern.
a6
Interrupt vector = 00000010.
Table 21 - Interrupt, Signalling and BERT
Control Word (Page 01H, Address 1AH)
(continued)
S I
Changed S Nibble Interrupt.
a6
a6
When unmasked (S I = 1), an
(0)
a6
interrupt
detection of a change of state in
received nibbles. Interrupt
vector = 00000010.
is
generated
upon
S
a6
S I
Changed S Bit Interrupt. When
a5
a5
unmasked (S I =1), an interrupt is
generated upon detection of a
(0)
a5
change of state in the received S
bit. Interrupt vector = 00000010.
a5
Table 20 - National Use Bit Interrupt Mask Word
(Page 01H, Address 19H)
34
MITEL [ MITEL NETWORKS CORPORATION ]
