SCH3112I-NE SMSC [SMSC Corporation], SCH3112I-NE Datasheet - Page 179
SCH3112I-NE
Manufacturer Part Number
SCH3112I-NE
Description
LPC IO with 8042 KBC, Reset Generation, HWM and Multiple Serial Ports
Manufacturer
SMSC [SMSC Corporation]
Datasheet
1.SCH3112I-NE.pdf
(396 pages)
- Current page: 179 of 396
- Download datasheet (6Mb)
LPC IO with 8042 KBC, Reset Generation, HWM and Multiple Serial Ports
Datasheet
Chapter 18 Reset Generation
SMSC SCH311X
RESGEN
default = 00h
RESGEN
1
0
The SCH311X device has a Reset Generator with the following characteristics:
■
■
■
■
■
The programming for the RESGEN function is in the REGEN register, runtime register offset 1Dh as
shown in
Output MUST be low for at least 100 msec after 5V and 3.3V rails are valid.
output is open-drain PWRGD_OUT
3.3V, 3.3V VTR and 5V voltage trip monitors are ALWAYS a source for the PWRGD_OUT.
An internal version of nTHERMTRIP signal from the HW monitor block, can be a source of
PWRGD_OUT, selectable via a bit in the RESGEN register.
A 1.6 sec watchdog timer can be a source for PWRGD_OUT, selectable via a bit in the RESGEN
register. See
The output pulse width is selectable via a strap option (see ), between 200 msec (default) or 500
msec. This pulse is applied to PWRGD_OUT. The RESGEN strap is sampled at
edge of PCIRST# or VCC POR. The following table summarizes the strap option
programmming.
Table
DELAY
200 msec delay (approximate) default
500 msec delay (approximate)
1Dh
(R/W)
18.2.
Section 18.1, "Watchdog Timer for Reset Generation," on page 164
Table 18.2 RESGEN Programming
Table 18.1 RESGEN Strap Option
Reset Generator
Bit[0] WDT2_EN: Enable Watchdog timer Generation / Select
0= WDT Enabled - Source for PWRGD_OUT (Default)
1= WDT Disabled - Not source for PWRGD_OUT
Bit[1] ThermTrip Source Select
0 = Thermtrip not source for PWRGD_OUT ((Default)
1 = Thermtrip source for PWRGD_OUT
Bit[2] WDT2_CTL: WDT input bit
Bit[7:3] Reserved
DATASHEET
163
the deaserting
Rev 0.2 (09-28-04)
for more details.
Related parts for SCH3112I-NE
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
(SCH3112 - SCH3116) LPC IO
Manufacturer:
SMSC Corporation
Datasheet:
Part Number:
Description:
FAST ETHERNET PHYSICAL LAYER DEVICE
Manufacturer:
SMSC Corporation
Datasheet:
Part Number:
Description:
357-036-542-201 CARDEDGE 36POS DL .156 BLK LOPRO
Manufacturer:
SMSC Corporation
Datasheet:
Part Number:
Description:
357-036-542-201 CARDEDGE 36POS DL .156 BLK LOPRO
Manufacturer:
SMSC Corporation
Datasheet:
Part Number:
Description:
357-036-542-201 CARDEDGE 36POS DL .156 BLK LOPRO
Manufacturer:
SMSC Corporation
Datasheet:
Part Number:
Description:
4-PORT USB2.0 HUB CONTROLLER
Manufacturer:
SMSC Corporation
Datasheet:
Part Number:
Description:
Manufacturer:
SMSC Corporation
Datasheet:
Part Number:
Description:
Manufacturer:
SMSC Corporation
Datasheet:
Part Number:
Description:
FDC37C672ENHANCED SUPER I/O CONTROLLER WITH FAST IR
Manufacturer:
SMSC Corporation
Datasheet:
Part Number:
Description:
COM90C66LJPARCNET Controller/Transceiver with AT Interface and On-Chip RAM
Manufacturer:
SMSC Corporation
Datasheet:
Part Number:
Description:
Manufacturer:
SMSC Corporation
Datasheet:
Part Number:
Description:
Manufacturer:
SMSC Corporation
Datasheet:
Part Number:
Description:
Manufacturer:
SMSC Corporation
Datasheet: