User guide

DS1875
PON Triplexer and SFP Controller
78 ______________________________________________________________________________________
Table 02h, Register BCh: HTXP
FACTORY DEFAULT 00h
READ ACCESS PW2
WRITE ACCESS PW2
MEMORY TYPE Nonvolatile (SEE)
BCh 2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
BIT 7 BIT 0
Fast comparison DAC threshold adjust for high TXP. This value is added to the APC DAC value recalled from
Table 04h. If the sum is greater than 0xFF, 0xFF is used. Comparisons greater than V
HTXP
, compared against
V
BMD
, create a TXP HI alarm. The same ranging applied to the APC DAC should be used here.
V
HTXP
=
Full Scale
255
 HTXP + APC DAC
()
Table 02h, Register BDh: LTXP
FACTORY DEFAULT 00h
READ ACCESS PW2
WRITE ACCESS PW2
MEMORY TYPE Nonvolatile (SEE)
BDh 2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
BIT 7 BIT 0
Fast-comparison DAC threshold adjust for low TXP. This value is subtracted from the APC DAC value recalled
from Table 04h. If the difference is less than 0x00, 0x00 is used. Comparisons less than V
LTXP
, compared
against V
BMD
, create a TXP LO alarm. The same ranging applied to the APC DAC should be used here.
V
LTXP
=
Full Scale
255
 APC DAC  LTXP
()