MIC3001GML Micrel Inc, MIC3001GML Datasheet - Page 54

• Manufacturer Part Number: MIC3001GML
• Description: IC FOM MANAGEMENT W/CALIBR 24MLF
• Manufacturer: Micrel Inc
• Type: Transceiverr

Specifications of MIC3001GML

• Protocol: SDHj Sonet
• Voltage - Supply: 3 V ~ 3.6 V
• Mounting Type: Surface Mount
• Package / Case: 24-MLF®, QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Number Of Drivers/receivers: -
• Other names: 576-1753-5; MIC3001GML

Micrel, Inc.
August 2004
Default Value
Serial Address
Byte Address
This four-byte field is for entry of the password required to access the OEM area of the MIC3001’s memory and registers. A
valid OEM password will also permit access to the user areas of memory. The byte at address 123 (7B h ) is the most significant
byte. This field is compared to the four-byte OEMPWSET field at serial address A6h, bytes 12 to 15. If the two fields match,
access is allowed to the OEM areas of the MIC3001 non-volatile memory at serial addresses A4 h and A6 h . The OEM password
is set by writing the new value into OEMPWSET. The password comparison is performed following the write to the MSB,
address 7B h . This byte must be written last!
A four-byte burst-write sequence to address 78 h may be used as this will result in the MSB being written last. 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. This field is reset to all zeros at power on. Any values written
to these locations will be readable by the host regardless of the locked/unlocked status of the device. If OEMPWSET is set to
zero (00000000 h ), the MIC3001 will remain unlocked regardless of the contents of the OEMPW field. This is the factory default
security setting.
Byte
3
2
1
0
Default Value
Serial Address
Byte Address
This register is for setting the password required to access the USER area of the MIC3001’s memory and registers. This field is
compared to the USRPW field at serial address A2 h , byte 251. If the two fields match, access is allowed to the USER areas of
the MIC3001 non-volatile memory at serial addresses A0h and A2h. If a valid USER password has not been entered, writes to
the serial ID fields, USRCTRL, and the user scratchpad areas of A0 h and A2 h will not be allowed, and USRPWSET will be
unreadable (returns all zeroes).
A USER password is set by writing the new value into USRPWSET. 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. This register is non-volatile and will be maintained through power and reset cycles. A valid USER or OEM
password is required for access to this register. Otherwise, this register will read as 00 h . Note: a valid OEM password overrides
the USER password setting. If a valid OEM password is currently in place, the user password will have no effect.
read/write
read/write
D[7]
D[7]
Weight
OEM Password Entry, Most Significant Byte (Address = 7Bh)
OEM Password Entry, 2nd Most Significant Byte (Address = 7Ah)
OEM Password Entry, 2nd Least Significant Byte (Address = 79h)
OEM Password Entry, Least Significant Byte (Address = 78h)
read/write
read/write
D[6]
D[6]
read/write
read/write
D[5]
D[5]
USER Password Setting (USRPWSET)
OEM Password Entry (OEMPW)
0000 0000 b = 00 h (reset to zero at power-on)
A2 h = 1010001 b
120 – 123 = 78 h - 7B h
0000 0000 b = 00 h
A2 h = 1010001 b
250 = FA h
read/write
read/write
D[4]
D[4]
54
read/write
read/write
D[3]
D[3]
(MSB is 7B h )
read/write
read/write
[e-mail]
D[2]
D[2]
read/write
read/write
D[1]
D[1]
or [phone]
M9999-082404-A
read/write
read/write
MIC3001
D[0]
D[0]