MIC3001 Datasheet, PDF (63/74 Pages) Micrel Semiconductor – SFP Management IC with Internal Calibration

MIC3001
Micrel
Signal Detect Threshold (LOSFLTn)
D[7]
read/write
D[6]
read/write
D[5]
read/write
D[4]
read/write
D[3]
read/write
D[2]
read/write
D[1]
read/write
D[0]
read/write
Default Value
0000 0000_b = 00_h
Serial Address
A6_h = 1010011_b
Byte Address
23 = 17_h
This register works in conjunction with the LOSFLT register to control the operation of the loss of signal comparator.
The comparator’s output, RXLOS, is asserted when the input on VRX falls below the level in LOSFLT. The output will
then be deasserted when the VRX signal rises above LOSFLTn. The input signal is subject to scaling by the RXPOT. If
the LOS comparator is disabled, i.e., LOSDIS = 1, this register is ignored. A valid OEM password is required for
access to this register. This register is non-volatile and will be maintained through power and reset cycles.
RX EEPOT Tap Selection (RXPOT)
D[7]
reserved
D[6]
reserved
D[5]
reserved
D[4]
read/write
D[3]
read/write
D[2]
read/write
D[1]
read/write
D[0]
read/write
Default Value
0000 0000_b = 00_h
Serial Address
A6_h = 1010011_b
Byte Address
24 = 18_h
This register is non-volatile and will be maintained through power and reset cycles. A valid OEM password is required
for access to these registers.
Bit(s)
D[7:5]
D[4:0]
Function
Reserved.
RXPOT tap selection:
00000 = No divider action; POT disconnected
00001 = 31/32
00010 = 30/32
•
•
•
11110 = 2/32
11111 = 1/32
Operation
Reserved. Always write as zero; reads undefined.
Read/write; non-volatile.
OEM Configuration 4 (OEMCFG4)
D[7]
Reserved
D[6]
Reserved
D[5]
Reserved
D[4]
Reserved
D[3]
D[2]
Read/write Read/write
D[1]
D[0]
Read/write Read/write
Default Value
0000 0000_b = 00_h
Serial Address
A6_h = 1010011_b
Byte Address
25 = 19_h
This register is non-volatile and will be maintained through power and reset cycles. A valid OEM password is required
for access to these registers.
August 2004
63
M9999-082404