LM87CIMTX National Semiconductor, LM87CIMTX Datasheet - Page 28

• Manufacturer Part Number: LM87CIMTX
• Description: IC,Data Acquisition System,8-CHANNEL,8-BIT,TSSOP,24PIN,PLASTIC
• Manufacturer: National Semiconductor

Specifications of LM87CIMTX

• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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1-7
4-5
6-7
Bit
Bit
2
3
4-5
6
Bit
Bit
0
0
1
7
0
1
2
3
4
5
Functional Description
13.13 VID4 Register — Address 49h
Power on default –
13.14 Configuration Register 2 — Address 4Ah
Power on default –
13.15 Interrupt Status Register 1 Mirror — Address 4Ch
Power on default –
VID4
Reserved
Thermal INT#
Mask
Local Temp.
Register Write
Once Bit
Remote Temp.
Register Write
Once Bit
THERM# Interrupt
Mode
Reserved
IRQ3 Enable
IRQ4 Enable
FAN1 RPM
Control
FAN2 RPM
Control
+2.5Vin
Vccp1
Vcc
+5Vin
Int. Temp.
Ext. Temp.
Name
Name
Name
Name
Read Only
Read Only
Read Only
Read Only
Read Only
Read Only
<
<
<
Read Only
7:1
7:0
7:0
Read/Write
Read/Write
>
>
>
Read/Write
Read Only
Read/Write
Read/Write
Read/Write
Once
Read/Write
Once
Read/Write
Read/Write
Read/Write
= 100 000,
= 0000 0000 binary
= 0000 0000 binary
Read/Write
Read/Write
A one indicates a High or Low limit has been exceeded.
A one indicates a High or Low limit has been exceeded.
A one indicates a High or Low limit has been exceeded.
A one indicates a High or Low limit has been exceeded.
A one indicates a High or Low limit has been exceeded.
A one indicates a High or Low limit has been exceeded.
<
(Continued)
0
FAN1 Speed Control.
FAN2 Speed Control.
<
<
<
<
<
<
<
<
>
5:4
5:4
5:4
5:4
7:6
7:6
7:6
7:6
Bit 4 of VID data from the CPU or power supply that indicates the operating voltage
(e.g. 1.5 V to 2.9 V).
When this bit is set to 1, thermal error events will not affect the INT# interrupt
output. THERM# outputs will still function normally.
When set to 1, this bit locks in the value set in the Internal Temp. high limit register
at 0x13h. The value cannot be changed until a power on reset is performed, or the
chip is re-Initialized by writing a 1 to Bit 7 of Configuration Register 1 (Register
40h).
When set to 1, this bit locks in the value set in the External Temp. high limit
register at 0x14h. The value cannot be changed until a power on reset is
performed, or the chip is re-Initialized by writing a 1 to Bit 7 of Configuration
Register 1 (Register 40h).
When set to 0, the THERM# output functions in Default mode. When set to 1, the
THERM# output functions in ACPI mode.
When set to 1, VID3/IRQ3 is enabled as an active high interrupt input (if the
IRQEN bit is set in bit 7 of the Channel Mode Register).
When set to 1, VID4/IRQ4 is enabled as an active high interrupt input (if the
IRQEN bit is set in bit 7 of the Channel Mode Register).
= VID4.
>
>
>
>
>
>
>
>
= 00 - divide by 1;
= 01 - divide by 2;
= 10 - divide by 4;
= 11 - divide by 8.
= 00 - divide by 1;
= 01 - divide by 2;
= 10 - divide by 4;
= 11 - divide by 8.
28
Description
Description
Description
Description