SXT6051 STM-1/0 SDH Overhead Terminator
Table 2: Signal Description (Sheet 9 of 11)
Pin #
Name
Type
Description
10
MMSPPAUEN
O
Multiplexer Protection Payload Enable. Indicates the pres-
ence of the VC-4 (in STM-1 mode) or VC-3 (in STM-0 mode)
on the MMSPPDATA<7:0> bus. This pin is only used in a
Master configuration.
HiZ-4ma
147, 148, DMSPPDATA<7:0>
I/O
TTLin-4ma
Demultiplexer Protection Data Bus. This is byte wide data at
19.44 MHz (STM-1) or 6.48 MHz (STM-0). It is an input in a
Master configuration and an output in a Slave configuration.
149, 150,
151, 152,
153, 154
144
DMSPPCKI
DMSPPCKO
I
Demultiplexer Protection clock. A 6.48 MHz (STM-0) or
19.44 MHz (STM-1) signal used to clock DMSPPDATA<7:0>.
This input is only used in a Master configuration.
TTLin
145
O
Demultiplexer Protection clock. A 6.48 MHz (STM-0) or
19.44 MHz (STM-1) signal used to clock DMSPPATA<7:0> in
a Slave configuration or to clock the RSOH serial output data
in a master configuration.
HiZ-8ma
143
142
141
DMSPPJ0EN
DMSPPAUEN
DMSPPSF
I/O
TTLin-4ma
Demultiplexer Protection Frame Indicator. An 8 KHz pulse
that indicates the presence of the J0 byte on the
DMSPPDATA<7:0> bus. The pin is programmed as an output
in a Slave configuration and an input in a Master configuration.
I/O
TTLin-4ma
Demultiplexer Protection Payload Enable. Indicates the
presence of VC-4 (STM-1) or VC-3 (STM-0) data on the
DMSPPDATA<7:0> bus. This pin is programmed as an output
in a Slave configuration and an input in a Master configuration.
I/O
TTLin-2ma
Signal Fail Indicator. This pin is programmed as an input in a
Master configuration and as an output in a Slave configuration.
In the Master configuration the value of this pin is reflected in
register C3H<bit 3>. In the Slave configuration the value of
this pin is the same as C1H<bit 5>.
140
DMSPPSD
I/O
TTLin-2ma
Signal Degrade Indicator. The pin is programmed as an input
in a Master configuration and an output in a Slave configura-
tion. In the Master configuration the value of this pin is
reflected in register C3H<bit 2>. In the Slave configuration the
value of this pin is the same as 21H<bit 1>.
16
LevelOne [ LEVEL ONE ]
