DS1864 Maxim Integrated Products, DS1864 Datasheet - Page 34

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

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SFP Laser Controller and
Diagnostic IC
34
Lower Memory Register 6Eh: Logic States
POWER-ON VALUE:
MEMORY TYPE:
Lower Memory Register 6Fh: Reserved Memory
ACCESS
WRITE
____________________________________________________________________
6Eh
6Fh
TXDS
bit7
bit6
bit5
bit4
bit3
bit2
bit1
bit0
N/A
bit7
TXDS: TX-Disable Status bit. Indicates the state of the TX-D pin.
0 = TX-D pin is low.
1 = TX-D pin is high.
TXDC: Soft TX-Disable bit. A control bit set by the user in order to control the On/Off state of both
DAC outputs.
0 = DACs enabled (Default).
1 = Forces the DAC0 and DAC1 outputs to a high-impedance (off) mode.
IN1S: A status bit reflecting the state of the IN1 input pin.
SELS: A status bit reflecting the state of the RSEL input pin.
SELC: Soft Rate Select. A control bit that set by the user and OR’d with SELS to set the state of the
RESELOUT pin. Used for bandwidth selection.
0 = (Default)
1 = This bit allows software control over the state of the RESELOUT pin.
TXF: A status bit that indicates the state of TX-F output pin.
0 = TX-F pin is at logic 0
1 = TX-F pin is at logic 1
RXL: A status bit that indicates the state of RX-LOS input pin.
0 = RX-LOS pin is at logic 0
1 = RX-LOS pin is at logic 1
RDBY: Ready Bar.
0 = V
1 = V
TXDC
ALL
x0xx0xxx b
Volatile (SRAM)
CC
CC
is above POA.
is below POA.
IN1S
N/A
RESERVED FOR SFF-8079
SELS
N/A
SELC
ALL
N/A
TXF
RXL
N/A
RDYB
N/A
bit0