XRT72L13 Datasheet, PDF (95/370 Pages) Exar Corporation – M13 MULTIPLEXER/CLEAR CHANNEL DS3 FRAMER IC

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PRELIMINARY
M13 MULTIPLEXER/CLEAR CHANNEL DS3 FRAMER IC XRT72L13
TABLE 4: REGISTER ADDRESS MAP
REV. 1.0.6
ADDRESS
REGISTER NAME
0xA5 DS2 Framer Interrupt Register - 2
0xA6 DS2 Framer Interrupt Status Register - 2
0xA7 DS2 Framer Interrupt Enable Register - 3
0xA8 DS2 Framer Interrupt Register - 3
0xA9 DS2 Framer Interrupt Status Register - 3
0xAA DS2 Framer Interrupt Enable Register - 4
0xAB DS2 Framer Interrupt Register - 4
0xAC DS2 Framer Interrupt Status Register - 4
0xAD DS2 Framer Interrupt Enable Register - 5
0xAE DS2 Framer Interrupt Register - 5
0xAF DS2 Framer Interrupt Status Register - 5
0xB0 DS2 Framer Interrupt Enable Register - 6
0xB1 DS2 Framer Interrupt Register - 6
0xB2 DS2 Framer Interrupt Status Register - 6
0xB3 DS2 Framer Interrupt Enable Register - 7
0xB4 DS2 Framer Interrupt Register - 7
0xB5 DS2 Framer Interrupt Status Register - 7
0xB6 - 0xFF Reserved
0x100 - Transmit LAPD Message Buffer (PMDL Messages)
0x157
0x158 Receive LAPD Message Buffer (PMDL Messages)
2.3.2.2 Operating Mode Register
OPERATING MODE REGISTER (ADDRESS = 0X00)
TYPE
RUR
R/O
R/W
RUR
R/O
R/W
RUR
R/O
R/W
RUR
R/O
R/W
RUR
R/O
R/W
RUR
R/O
R/W
R/O
DEFAULT VALUE
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
BIT 7
Local Loop-
back Mode
BIT 6
Line Loop-
back Mode
BIT 5
Internal LOS
Enable
BIT 4
RESET
R/W
R/W
R/W
R/W
0
0
1
0
BIT 3
Interrupt
Enable
RESET
R/W
1
BIT 2
Frame Format
R/W
0
BIT 1
BIT 0
TimRefSel[1:0]
R/W
R/W
1
1
Bit 7 - Local Loop-back Mode
This bit-field permits the user to configure the
XRT72L13 M13 device to operate in the “Local Loop-
back” Mode.
Setting this bit-field to “1” configures the XRT72L13
M13 chip to operate in the “Local Loopback” Mode.
Setting this bit-field to “0” configures the XRT72L13
M13 chip to not operate in the “Local Loopback”
Mode.
Bit 6 - Line Loopback Mode
This bit-field permits the user to configure the
XRT72L13 M13 device to operate in the “Line Loop-
back” Mode.
Setting this bit-field to “1” configures the XRT72L13
M13 chip to operate in the “Line Loopback” Mode.
Setting this bit-field to “0” configures the XRT72L13
M13 chip to not operate in the “Line Loopback” Mode.
Bit 5 - Internal LOS Enable
This “Read/Write” bit-field permits the user to config-
ure the XRT72L13 M13 chip to either declare an LOS
(Loss of Signal) condition, based upon the “Internal
Circuit’s” criteria or not.
Setting this bit-field to “0” configures the XRT72L13
M13 chip to NOT declare an LOS condition, based
upon its own internal criteria.
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