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參數資料
| 型號： | LM79CCVFX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 模擬信號調理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PQFP44 |
| 封裝： | 10 X 10 MM, PLASTIC, QFP-44 |
| 文件頁數： | 18/31頁 |
| 文件大?。?/td> | 469K |
| 代理商： | LM79CCVFX |
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Functional Description (Continued)
13.2 Data Register (Port x6h)
Power on default <7:0> = 00h
Bit
Name
Read/
Write
Description
7–0
Data
Read/Write
Data to be read from or to be written to RAM and Register.
13.3 Configuration Register — Address 40h
Power on default <7:0> = 00001000 binary
Bit
Name
Read/
Write
Description
0
Start
Read/Write
A one enables startup of monitoring operations, a zero puts the part in standby mode.
Note: The outputs of Interrupt pins will not be cleared if the user writes a zero to this
location after an interrupt has occurred unlike “INT__Clear” bit.
1
SMI Enable
Read/Write
A one enables the SMI Interrupt output.
2
NMI/IRQ
Enable
Read/Write
A one enables the NMI/IRQ Interrupt output.
3
INT__Clear
Read/Write
A one disables the SMI and NMI/IRQ outputs without affecting the contents of Interrupt
Status Registers. The device will stop monitoring. It will resume upon clearing of this
bit.
4
RESET
Read/Write
A one outputs at least a 20 ms active low reset signal at RESET if <7> = 1inSMI
Mask Register 2. This bit is cleared once the pulse has gone inactive.
5
NMI/IRQ
Select
Read/Write
A one selects NMI, and a zero selects IRQ.
6
Power Switch
Bypass
Read/Write
A one in this bit drives a zero on open drain Power Switch Bypass pin.
7
INITIALIZATION
Read/Write
A one restores power on default value to all registers except the Serial Bus Address
register. This bit clears itself since the power on default is zero.
LM79
www.national.com
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