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STANDARD PRODUCT
PM4351 COMET
DATA SHEET
PMC-1970624
ISSUE 10
COMBINED E1/T1 TRANSCEIVER
PROPRIETARY AND CONFIDENTIAL
255
Register 082H: E1 TRAN International/National Control
Bit
Type
Function
Default
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
R/W
R/W
Si[1]
Si[0]
Unused
Unused
Unused
Unused
Unused
Unused
1
1
X
X
X
X
X
X
When the E1/T1B bit of the Global Configuration register is a logic 0, this register
is held reset.
Si[1:0]:
The bits Si[1] and Si[0] correspond to the International bits. The Si[1] and
Si[0] bits can be programmed to any value and will be inserted into bit 1 of
each FAS frame and NFAS frame, respectively, when the block is configured
for frame generation, INDIS is set to logic 0, and CRC multiframe generation
is disabled. When CRC multiframe generation is enabled, both Si[1] and
Si[0] are ignored if FEBE indication is enabled; if FEBEDIS is a logic 1 and
INDIS = 0, the values programmed in the Si[1] and Si[0] bit positions are
inserted into the spare bit locations of frame 13 and frame 15, respectively, of
the CRC multiframe. If both FEBEDIS and INDIS are logic 1, data from
BTPCM replaces the Si[0] and Si[1] bits in the CRC multiframe.
The Si[1] and Si[0] bits should be programmed to a logic 1 when not being
used to carry information.
When the COMET is reset, the contents of the register are set to logic 1.