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LM64 bảng dữ liệu(PDF) 19 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
tên linh kiện LM64
Giải thích chi tiết về linh kiện  짹1째C Remote Diode Temperature Sensor with PWM Fan Control and 5 GPIO?셲
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nhà sản xuất  NSC [National Semiconductor (TI)]
Trang chủ  http://www.national.com
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LM64 bảng dữ liệu(HTML) 19 Page - National Semiconductor (TI)

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2.0 LM64 Registers (Continued)
Fan Control Registers (Continued)
Address
Hex
Read/
Write
Bits
POR
Value
Name
Description
4D
HEX FAN PWM FREQUENCY REGISTER
4D
R/W
7:5
000
PWM
Frequency
These bits are unused and always set to 0
4:0
10111
The PWM Frequency = PWM_Clock / 2n, where PWM_Clock = 360
kHz or 1.4 kHz (per the PWM Clock Select bit in Register 4A), and n =
value of the register. Note: n = 0 is mapped to n = 1. See the
Application Note at the end of this datasheet.
4C
HEX PWM VALUE REGISTER
4C
Read
(Write
only if
reg
4A bit
5 = 1.)
7:6
00
PWM
Value
These bits are unused and always set to 0
5:0
000000
If PWM Program (register 4A, bit 5) = 0 this register is read only and
reflects the LM64’s current PWM value from the Lookup Table.
If PWM Program (register 4A, bit 5) = 1, this register is read/write and
the desired PWM value is written directly to this register, instead of
from the Lookup Table, for direct fan speed control.
This register will read 0 during the Spin-Up cycle.
See Application Notes section at the end of this datasheet for more
information regarding the PWM Value and Duty Cycle in %.
www.national.com
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