LPC47M107S-MS Standard Microsystems (SMSC), LPC47M107S-MS Datasheet - Page 140
LPC47M107S-MS
Manufacturer Part Number
LPC47M107S-MS
Description
Manufacturer
Standard Microsystems (SMSC)
Datasheet
1.LPC47M107S-MS.pdf
(188 pages)
Specifications of LPC47M107S-MS
Pin Count
100
Lead Free Status / RoHS Status
Compliant
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Fan Control
Default = 0x50
Fan1 Tachometer
Register
Default = 0x00
Fan2 Tachometer
Register
Default = 0x00
Fan1 Preload
Register
Default = 0x00
Fan2 Preload
Register
Default = 0x00
on VTR POR
on VTR POR
on VTR POR
on VTR POR
on VTR POR
NAME
REG OFFSET
(R/W)
(R/W)
(R/W)
(hex)
(R)
(R)
5A
5B
5C
58
59
Page 140
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
Fan” table (Table 50) 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
Fan” table (Table 50) in “Fan Speed Control and
Monitoring” section.
Bit[2] Fan 1 Clock multiplier
this register and bit 7 of the FAN1
Bit[3] Fan 2 Clock multiplier
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.
Bit[7:6] The FAN2 count divisor. Clock scalar for adjusting
the tachometer count. Default = 2.
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.
Fan Preload Register 2
Bit[7:0] The FAN2 tachometer preload. This is the initial
value used in the computation of the FAN2 count. Writing
this register resets the tachometer count.
0=No multiplier used
1=Double the fan speed selected by bit 0
register
0=No multiplier used
1=Double the fan speed selected by bit 1
00: divisor = 1
01: divisor = 2
10: divisor = 4
11: divisor = 8
00: divisor = 1
01: divisor = 2
10: divisor = 4
11: divisor = 8
DESCRIPTION
OUT
OUT
.
.
See “Different Modes for
See “Different Modes for
of
of
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