DS1864 Maxim Integrated Products, DS1864 Datasheet - Page 59

• Manufacturer Part Number: DS1864
• Description: SFP Laser Controller and Diagnostic IC
• Manufacturer: Maxim Integrated Products

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Table 04h (Table 01h in DS1859 Configuration), DAh: Control And Shutdown Configuration And Status
FACTORY DEFAULT:
MEMORY TYPE:
This byte contains bits for shutdown configuration and status control.
Table 04h (Table 01h in DS1859 Configuration), DBh: High Transmitted Power Threshold (HTXP)
FACTORY DEFAULT:
MEMORY TYPE:
This byte sets a high D/A threshold for comparing transmitted power level. Only the upper 8 bits of the 16 bit value are compared.
Table 04h (Table 01h in DS1859 Configuration), DCh: Low Transmitted Power Threshold (LTXP)
FACTORY DEFAULT:
MEMORY TYPE:
This byte sets a low D/A threshold for comparing transmitted power level. Only the upper 8 bits of the 16 bit value are compared.
DCh
DBh
DAh
bit7
bit6
bit5
bit4
bit3:1
bit0
FP O L
bit7
bit7
bit7
2
2
7
7
FPOL: Configures the polarity of the auxiliary shutdown (FETG output).
0 = FETG is asserted low under a shutdown condition.
1 = FETG is asserted high under a shutdown condition.
HTXP enable: Configures a shutdown in response to a HTXP alarm.
0 = Shutdown will not respond to a trip of HTXP alarm.
1 = Shutdown will respond to a trip of HTXP alarm.
HBAL enable: Configures a shutdown in response to a HBAL alarm.
0 = Shutdown will not respond to a trip of HBAL alarm.
1 = Shutdown will respond to a trip of HBAL alarm.
LTXP enable: Configures a shutdown in response to a LTXP alarm.
0 = Shutdown will not respond to a trip of LTXP alarm.
1 = Shutdown will respond to a trip of LTXP alarm.
Not used.
M A SK : C onfi g ur es l ocati ons of al ar m s and w ar ni ng i nter r up t m asks to b e ei ther i n Tab l e 05h or i n Tab l e
01h ( Tab l e 00h i n D S 1859 confi g ur ati on) .
0 = Inter r up t m asks ar e l ocated i n Tab l e 05h, b ytes F8h thr oug h FBh.
1 = Inter r up t m asks ar e l ocated i n Tab l e 01h ( Tab l e 00h i n D S 1859 confi g ur ati on) , b ytes F8h thr oug h FBh.
H TX P enab l e H BAL enab l e LTX P enab l e
FFh
00h
00h
Shadowed Memory (SEE)
Shadowed Memory (SEE)
Shadowed Memory (SEE)
2
2
6
6
____________________________________________________________________
2
2
5
5
SFP Laser Controller and
2
2
4
4
2
2
X
3
3
2
2
Diagnostic IC
X
2
2
2
2
X
1
1
M AS K
bit0
bit0
bit0
2
2
0
0
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