Rainbow Electronics DS1875 - Manual (Page 55)

DS1875
Lower Memory, Register 79h: DIN
POWER-ON VALUE See description
READ ACCESS All
WRITE ACCESS N/A
MEMORY TYPE Volatile
79h INV M3QT MUX M3QT INV LOS MUX LOS D3 IN D2 IN D1 IN D0 IN
BIT 7 BIT 0
BIT 7
INV M3QT: Status of inversion of M3QT (internal signal) to D2 pin. MUX M3QT bit must be set to 1 or
this bit does not affect the output. The value is controlled (or set) by the DPU byte.
1 = M3QT buffered to D2 is inverted.
BIT 6
MUX M3QT: Determines control of D2 pin. The value is controlled (or set) by the DPU byte.
0 = Logic value of D2 is controlled by DOUT byte.
1 = Logic value of D2 is controlled by M3QT (internal signal) and INV M3QT bit.
BIT 5
INV LOS: Status of inversion of LOSI pin to D0 pin. MUX LOS bit must be set to 1 or this bit does not
effect the output. The value is controlled (or set) by the DPU byte.
1 = LOSI buffered D0 is inverted.
BIT 4
MUX LOS: Determines control of D0 pin. The value is controlled (or set) by the DPU byte.
0 = Logic value of D0 is controlled by DOUT byte.
1 = Logic value of D0 is controlled by LOSI pin and INV LOS bit.
BIT 3 D3 IN: Reflects the logic value of D3 pin.
BIT 2 D2 IN: Reflects the logic value of D2 pin.
BIT 1 D1 IN: Reflects the logic value of D1 pin.
BIT 0 D0 IN: Reflects the logic value of D0 pin.
Lower Memory, Register 7Ah: RESERVED
POWER-ON VALUE 00h
READ ACCESS All
WRITE ACCESS N/A
MEMORY TYPE N/A
This register is reserved. The value when read is 00h.
PON Triplexer and SFP Controller
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