LPC47B272-MS SMSC, LPC47B272-MS Datasheet - Page 191

• Manufacturer Part Number: LPC47B272-MS
• Description: IC CTRLR SUPER I/O LPC 100-QFP
• Manufacturer: SMSC

Specifications of LPC47B272-MS

• Controller Type: I/O Controller
• Interface: LPC
• Voltage - Supply: 3.3V
• Current - Supply: 15mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 100-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 638-1019

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
SMSC LPC47B27x
NAME
NAME
t1
t1
t2
MIDI_Tx
FANx
tolerance on f
these registers.
programmable through Bits[6:1] to be between 1.56% and 98.44%. When Bit 0 is 1, the FANx
pin is high.
Data
MIDI Data Bit Time
PWM Period (Note 1)
PWM High Time (Note 2)
Start Bit
Idle (No Data)
out
DESCRIPTION
out
is +/- 2%.
,where f
If Bits[6:1] = “000000” then the FANx pin is low.
DESCRIPTION
FIGURE 35 – FAN OUTPUT TIMING
FIGURE 34 – MIDI DATA BYTE
t2
out
is programmed through the FANx and Fan Control registers. The
t1
DATASHEET
t1
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Data
Data
0.00033
0.021
MIN
31.7
MIN
TYP
TYP
32
Idle (No Data)
MAX
25.5
25.1
Stop Bit
MAX
32.3
The duty cycle is
UNITS
Rev. 04-17-07
UNITS
msec
msec
µsec