LPC47M112 SMSC Corporation, LPC47M112 Datasheet - Page 203
LPC47M112
Manufacturer Part Number
LPC47M112
Description
ENHANCED SUPER I/O CONTROLLER WITH LPC INTERFACE
Manufacturer
SMSC Corporation
Datasheet
1.LPC47M112.pdf
(208 pages)
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Enhanced Super I/O Controller with LPC Interface
Datasheet
Note: The MIDI bit clock is 31.25kHz +/- 1%
Note 1: The period is 1/f
Note 2: When Bit 0 of the FANx registers is 0, then the duty cycle is programmed through Bits[6:1] of these
SMSC DS – LPC47M112
NAME
f
registers. If Bits[6:1] = “000000” then the FANx pin is low. The duty cycle is programmable through Bits[6:1]
to be between 1.56% and 98.44%. When Bit 0 is 1, the FANx pin is high.
NAME
out
t1
t2
t1
is +/- 2%.
MIDI_Tx
FANx
Data
PWM Period (Note 1)
PWM High Time (Note 2)
MIDI Data Bit Time
out
Start Bit
Idle (No Data)
,where f
DESCRIPTION
out
DESCRIPTION
is programmed through the FANx and Fan Control registers. The tolerance on
FIGURE 35 – FAN OUTPUT TIMING
t2
FIGURE 34– MIDI DATA BYTE
t1
t1
Page 203
Data
Data
0.00033
0.021
MIN
TYP
31.7
MIN
TYP
32
Idle (No Data)
MAX
25.5
25.1
Stop Bit
MAX
32.3
UNITS
msec
msec
UNITS
µsec
Rev. 02/02/2005
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