參數(shù)資料
型號(hào): LPC47M14O-NC
廠商: SMSC Corporation
英文描述: CAT5 AUDIO/VIDEO SPLITTER
中文描述: 128引腳ENGANCED超級(jí)I / O與LPC接口和USB集線器控制器
文件頁(yè)數(shù): 149/205頁(yè)
文件大小: 1219K
代理商: LPC47M14O-NC
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SMSC DS – LPC47M14X
Page 149
Rev. 03/19/2001
NAME
REG OFFSET
(hex)
DESCRIPTION
Fan Control
Default = 0x50
on VTR POR
58
(R/W)
Fan Control Register
Bit[0] Fan 1 Clock Source Select
This bit and the Fan 1 Clock Multiplier bit is used with
The Fan 1 Clock Select bit in the Fan 1 register (0x56) to
determine the fan speed F
OUT
. See Table 57 –
Different Modes for Fan in “Fan Speed Control and
Monitoring” section.
Bit[1] Fan 2 Clock Source Select
This bit and the Fan 2 Clock Multiplier bit is used with
The Fan 2 Clock Select bit in the Fan 2 register (0x57) to
determine the fan speed F
OUT
. See Table 57 –
Different Modes for Fan in “Fan Speed Control and
Monitoring” section.
Bit[2] Fan 1 Clock multiplier
0=No multiplier used
1=Double the fan speed selected by bit 0 of this
register and bit 7 of the FAN1
register
Bit[3] Fan 2 Clock multiplier
0=No multiplier used
1=Double the fan speed selected by bit 1 of this
register and bit 7 of the FAN2 register
Bit[5:4] The FAN1 count divisor. Clock scalar for
adjusting the tachometer count. Default = 2.
00: divisor = 1
01: divisor = 2
10: divisor = 4
11: divisor = 8
Bit[7:6] The FAN2 count divisor. Clock scalar for
adjusting the tachometer count. Default = 2.
00: divisor = 1
01: divisor = 2
10: divisor = 4
11: divisor = 8
Fan Tachometer Register 1
Bit]7:0] The 8-bit FAN1 tachometer count. The number
of counts of the internal clock per pulse of the fan. The
count value is computed from Equation 1. This value is
the final (maximum) count of the previous pulse
(latched). The value in this register may not be valid for
up to 2 pulses following a write to the preload register.
Fan Tachometer Register 2
Bit[7:0] The 8-bit FAN2 tachometer count. The number
of counts of the internal clock per pulse of the fan. The
count value is computed from Equation 1. This value is
the final (maximum) count of the previous pulse
(latched). The value in this register may not be valid for
up to 2 pulses following a write to the preload register.
Fan Preload Register 1
Bit[7:0] The FAN1 tachometer preload. This is the initial
value used in the computation of the FAN1 count.
Writing this register resets the tachometer count.
Fan1 Tachometer
Register
Default = 0x00
on VTR POR
59
(R)
Fan2 Tachometer
Register
Default = 0x00
on VTR POR
5A
(R)
Fan1 Preload
Register
Default = 0x00
on VTR POR
5B
(R/W)
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