LPC47M107S-MS Standard Microsystems (SMSC), LPC47M107S-MS Datasheet - Page 98
![no-image](/images/manufacturer_photos/0/6/632/standard_microsystems__smsc__sml.jpg)
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LPC47M107S-MS
Manufacturer:
SMSC
Quantity:
3 000
Company:
Part Number:
LPC47M107S-MS
Manufacturer:
Standard
Quantity:
1 036
Company:
Part Number:
LPC47M107S-MS
Manufacturer:
Microchip Technology
Quantity:
10 000
Part Number:
LPC47M107S-MS
Manufacturer:
SMSC
Quantity:
20 000
- Current page: 98 of 188
- Download datasheet (2Mb)
Bit 0 of Port 92, which generates the nALT_RST signal, is used to reset the CPU under program control. This signal
is AND’ed together externally with the reset signal (nKBDRST) from the keyboard controller to provide a software
means of resetting the CPU. This provides a faster means of reset than is provided by the keyboard controller.
Writing a 1 to bit 0 in the Port 92 Register causes this signal to pulse low for a minimum of 6µs, after a delay of a
minimum of 14µs. Before another nALT_RST pulse can be generated, bit 0 must be set to 0 either by a system reset
of a write to Port 92. Upon reset, this signal is driven inactive high (bit 0 in the Port 92 Register is set to 0).
If Port 92 is enabled, i.e., bit 2 of KRST_GA20 is set to 1, then a pulse is generated by writing a 1 to bit 0 of the Port
92 Register and this pulse is AND’ed with the pulse generated from the 8042. This pulse is output on pin KRESET
and its polarity is controlled by the GPI/O polarity configuration.
7:6
Bit
5
4
3
2
1
0
Function
Reserved. Returns 00 when read
Reserved. Returns a 1 when read
Reserved. Returns a 0 when read
Reserved. Returns a 0 when read
Reserved. Returns a 1 when read
ALT_A20 Signal control. Writing a 0 to this bit causes the ALT_A20 signal to be
driven low. Writing a 1 to this bit causes the ALT_A20 signal to be driven high.
Alternate System Reset. This read/write bit provides an alternate system reset
function. This function provides an alternate means to reset the system CPU to
effect a mode switch from Protected Virtual Address Mode to the Real Address
Mode. This provides a faster means of reset than is provided by the Keyboard
controller. This bit is set to a 0 by a system reset. Writing a 1 to this bit will cause
the nALT_RST signal to pulse active (low) for a minimum of 1 µs after a delay of
500 ns. Before another nALT_RST pulse can be generated, this bit must be written
back to a 0.
8042
P21
0
0
1
1
Name
Location
Default Value
Attribute
Size
nGATEA20
ALT_A20
Port 92 Register
Page 98
0
1
0
1
System
nA20M
Port 92
92h
24h
Read/Write
8 bits
0
1
1
1
Related parts for LPC47M107S-MS
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![LAN91C111-NU](/photos/31/30/313086/406-128-tqfp_tmb.jpg)
Part Number:
Description:
Manufacturer:
Standard Microsystems (SMSC)
Datasheet:
![LAN9115-MT](/images/manufacturer_photos/0/6/632/standard_microsystems__smsc__tmb.jpg)
Part Number:
Description:
Manufacturer:
Standard Microsystems (SMSC)
Datasheet:
![LAN9118-MT](/images/manufacturer_photos/0/6/632/standard_microsystems__smsc__tmb.jpg)
Part Number:
Description:
Manufacturer:
Standard Microsystems (SMSC)
Datasheet:
![USB2229-NU-02](/images/manufacturer_photos/0/6/632/standard_microsystems__smsc__tmb.jpg)
Part Number:
Description:
Manufacturer:
Standard Microsystems (SMSC)
Datasheet:
![USB2601-NU-05](/photos/31/30/313086/406-128-tqfp_tmb.jpg)
Part Number:
Description:
Manufacturer:
Standard Microsystems (SMSC)
Datasheet:
![USB2514B-AEZG](/images/manufacturer_photos/0/6/632/standard_microsystems__smsc__tmb.jpg)
Part Number:
Description:
USB CHIP
Manufacturer:
Standard Microsystems (SMSC)
Datasheet:
![USB2514BI-AEZG](/images/manufacturer_photos/0/6/632/standard_microsystems__smsc__tmb.jpg)
Part Number:
Description:
Manufacturer:
Standard Microsystems (SMSC)
Datasheet:
![USB2251-NU-05](/images/manufacturer_photos/0/6/632/standard_microsystems__smsc__tmb.jpg)
Part Number:
Description:
ULTRA FAST USB 2.0 MULTI-SLOT FLASH MEDI
Manufacturer:
Standard Microsystems (SMSC)
Datasheet:
![LAN91C96-MS](/images/manufacturer_photos/0/6/632/standard_microsystems__smsc__tmb.jpg)
Part Number:
Description:
Manufacturer:
Standard Microsystems (SMSC)
Datasheet:
![LAN9215-MT](/photos/31/30/313088/100pin_tqfp_tmb.jpg)
Part Number:
Description:
Manufacturer:
Standard Microsystems (SMSC)
Datasheet:
![LAN91C111I-NS](/images/manufacturer_photos/0/6/632/standard_microsystems__smsc__tmb.jpg)
Part Number:
Description:
Manufacturer:
Standard Microsystems (SMSC)
Datasheet:
![USB2514I-HZH](/images/manufacturer_photos/0/6/632/standard_microsystems__smsc__tmb.jpg)
Part Number:
Description:
Manufacturer:
Standard Microsystems (SMSC)
Datasheet:
![USB2514-HZH](/images/manufacturer_photos/0/6/632/standard_microsystems__smsc__tmb.jpg)
Part Number:
Description:
Manufacturer:
Standard Microsystems (SMSC)
Datasheet:
![EMC2303-1-KP-TR](/images/manufacturer_photos/0/6/632/standard_microsystems__smsc__tmb.jpg)
Part Number:
Description:
Manufacturer:
Standard Microsystems (SMSC)
Datasheet: