LM93CIMT National Semiconductor, LM93CIMT Datasheet - Page 40

• Manufacturer Part Number: LM93CIMT
• Description: Microprocessor Support IC
• Manufacturer: National Semiconductor

Specifications of LM93CIMT

• Peak Reflow Compatible (260 C): No
• Supply Voltage Max: 3.6V
• Leaded Process Compatible: No
• Supply Voltage Min: 3V
• Operating Temperature Min: 0��C
• Package / Case: 56-TSSOP
• Operating Temperature Max: 85°C
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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Register
Address
Bit
7:1
Register
Address
Register
Address
Register
Address
16.0 Registers
16.3 FACTORY REGISTERS 00h–3Fh
16.3.1 Register 00h XOR Test
The reserved bits of this register should only be used by the manufacturer for testing of the ASIC.
16.3.2 Register 01h SMBus Test
This register can be used to verify that the SMBus can read and write to the device without effecting any programmed settings.
16.3.3 Register 3Eh Manufacturer ID
The Manufacturer ID register contains the manufacturer identification number. This number is assigned by National Semicon-
ductor and is a method for uniquely identifying the part manufacturer.
16.3.4 Register 3Fh Version/Stepping
The four least significant bits of the Version/Stepping register [3:0] contain the current stepping of the LM93 silicon. The four most
significant bits [7:4] reflect the LM93 version number. The LM93 has a fixed version number of 0111b. For the first stepping of
LM93, this register reads 01110000b. For the second stepping of the LM93, this register reads 01110001b and so on. It is
incrementaly increased for future versions for the silicon. The final released silicon has a stepping of 3h therefore this register
reads 73h.
The register is used by application software to identify which device in the family of hardware monitoring ASICs has been
implemented in the given system. Based on this information, software can determine which registers to read from and write to.
Application software may use the current stepping to implement work-a-rounds for bugs found in a specific silicon stepping.
0
3Fh
3Eh
00h
01h
Name
XEN
RES
Read/
Write
Read/
Read/
Write
Read/
Write
Write
R/W
R/W
R
R
R/W
R/W
R
Default
Version/Stepping
Manufactur ID
SMBus Test
XOR Test
Register
Register
0
0
(Continued)
Register
Name
Name
Register
Name
Name
The LM93 incorporates an XOR tree test mode. When the test mode is enabled
by setting this bit, the part enters XOR test mode. Clearing this bit brings the part
out of XOR test mode.
Reserved
Bit 7
Bit 7
Bit 7
7
0
Bit 7
0
Bit 6
Bit 6
Bit 6
6
Bit 6
0
1
VER[3:0]
Bit 5
Bit 5
Bit 5
40
5
Bit 5
0
1
Description
Bit 4
RES
Bit 4
Bit 4
4
Bit 4
0
1
Bit 3
Bit 3
Bit 3
3
Bit 3
0
0
Bit 2
Bit 2
Bit 2
Bit 2
2
0
0
STP[3:0]
Bit 1
Bit 1
Bit 1
Bit 1
1
0
1
Bit 0
XEN
Bit 0
Bit 0
Bit 0
0
0
1
Masking
Default
Default
Default
Default
Sleep
Value
Value
Value
Value
N/A
N/A
00h
N/D
01h
73h