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參數資料
| 型號： | LM81 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Serial Interface ACPI-Compatible Microprocessor System |
| 中文描述： | 串行接口ACPI的兼容微處理器系統 |
| 文件頁數： | 29/32頁 |
| 文件大小： | 412K |
| 代理商： | LM81 |
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Functional Description
(Continued)
13.14 Extended Mode Register 1— Address 4Ch
Power on default –
<
7:0
>
= 0100 0100 binary
Bit
0
Name
Read/Write
Read/Write
Description
Extended Mode
Enable
A one enables the Extended Interrupt Modes, the T_CRIT_A output and all the
functions listed in the Extended Mode Registers. Bit 7 of the Interrupt Status
register will be activated to reflect the interrupt status of the LOW limit comparison
result.
A mask bit for the LOW limit Interrupt. A one disables the interrupt from propagating
to the INT pin.
The state of these bits select the interrupt mode for T_CRIT_A as described below.
<
3:2
>
= 00 or
<
3:2
>
= 11: Repetitive Interrupt Mode
<
3:2
>
= 01: One-Time Interrupt Mode
<
3:2
>
= 10: Comparator Mode
A one enables the T_CRIT_A pin.
1
LOW Limit Mask
Bit
T_CRIT_A
Interrupt Mode
Select
Read/Write
2-3
Read/Write
4
T_CRIT_A
Enable
T_CRIT_A
Polarity
T_CRIT_A Mask
Enable
T_CRIT_A Status
Bit
Read/Write
5
Read/Write
A one sets the T_CRIT_A pin active HIGH. A zero sets the T_CRIT_A pin active
LOW.
A one prevents the T_CRIT_A interrupt from propagating to the INT output pin.
6
Read/Write
7
Read
A one indicates that a T_CRIT_A interrupt has occurred.
13.15 Extended Mode Register 2 — Address 4Dh
Power on default –
<
7:0
>
= 0000 0000 binary
Bit
0-2
Name
Read/Write
Read/Write
Description
Hysteresis Offset
Value
12-bit
Temperature
Resolution Enable
12-bit
Temperature Data
T
HYST
value.
3
Read/Write
A one sets the temperature resolution to 12 bits.
4-7
Read Only
12-bit temperature data least significant bits. Bit 7 mirrors bit 7 in the temperature
configuration register (4Bh) and has a weight of 0.5C; bits 6-4 have a weight of
0.25, 0.125, and 0.0625C, respectively.
www.national.com
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