MIC3000 Datasheet, PDF (56/68 Pages) Micrel Semiconductor – SFP Management IC

MIC3000
Micrel
Fault Suppression Timer (FLTTMR)
Fault suppression interval in increments of 0.5ms
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
10 = 0A_h
Saturation faults are suppressed for a time, t_FLTTMR, following laser turn-on. This avoids nuisance tripping while the
APC loop starts up. The length of this interval is (FLTTMR×0.5ms), typical. A value of zero will result in no fault sup-
pression. A valid OEM password is required for access to this register. This register is non-volatile and will be main-
tained through power and reset cycles.
Fault Mask (FLTMSK)
D[7]
OEMIM
read/write
D[6]
POHE
read/write
D[5]
reserved
D[4]
reserved
D[3]
SATMSK
read/write
D[2]
TXMSK
read/write
D[1]
IAMSK
read/write
D[0]
DFMSK
read/write
Default Value
0000 0000_b = 00_h
Serial Address
A6_h = 1010011_b
Byte Address
11 = 0B_h
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.
Bit
D[7]
OEMIM
D[6]
POHE
D[5:4]
D[5:4]
D[3]
SATMSK
D[2]
TXMSK
D[1]
IAMSK
D[0]
DFMSK
Function
OEM interrupt mask bit
OEM Power-on Hour Meter enable bit
Reserved
APC saturation fault mask bit
High TX optical power fault mask bit
Bias current high alarm mask bit
Diode fault mask bit
Operation
1 = masked; 0 = enabled; Read/write; non-volatile.
1 = enabled; 0 = disabled; Read/write; non-volatile.
Always write as zero; reads undefined.
1 = masked; 0 = enabled; Read/write; non-volatile.
1 = masked; 0 = enabled; Read/write; non-volatile.
1 = masked; 0 = enabled; Read/write; non-volatile.
1 = masked; 0 = enabled; Read/write; non-volatile.
OEM Password Setting (OEMPWSET)
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
12 - 15 = 0F_h - 0F_h; 0C_h = MSB
This four-byte field is the password required for access to the OEM area of the MIC3000’s memory and registers. The
byte at address 250 (FA_h) is the most significant byte. This field is compared to the four-byte OEMPW field at serial
address A2_h, byte 120 to 123. If the two fields match, access is allowed to the OEM areas of the MIC3000 non-volatile
memory at serial addresses A4_h and A6_h. The OEM password may be set by writing the new value into OEMPWSET.
The new password will not take effect until after a power-on reset occurs or a warm reset is performed using the RST
bit in OEMCFG0. This allows the new password to be verified before it takes effect. These registers are non-volatile
and will be maintained through power and reset cycles. A valid OEM password is required for access to this register.
M9999-101204
56
October 2004