LPC47B272-MS SMSC, LPC47B272-MS Datasheet - Page 105

• 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

Latches On Keyboard and Mouse IRQs
The implementation of the latches on the keyboard and mouse interrupts is shown below.
The KLATCH and MLATCH bits are located in the KRST_GA20 register, in Logical Device 7 at 0xF0.
These bits are defined as follows:
SMSC LPC47B27x
8042
8042
FIGURE 5 – KEYBOARD LATCH
KINT
MINT
KLATCH Bit
MLATCH Bit
FIGURE 6 – MOUSE LATCH
RD 60
RD 60
DATASHEET
VCC
VCC
D
D
CLR
CLR
- 105 -
Q
Q
KINT
MINT
new
new
Rev. 04-17-07