Circuit diagrams and other information relating to SMSC products are included as a means of illustrating typical applications. Consequently, complete
information sufficient for construction purposes is not necessarily given. Although the information has been checked and is believed to be accurate, no
responsibility is assumed for inaccuracies. SMSC reserves the right to make changes to specifications and product descriptions at any time without
notice. Contact your local SMSC sales office to obtain the latest specifications before placing your product order. The provision of this information does
not convey to the purchaser of the described semiconductor devices any licenses under any patent rights or other intellectual property rights of SMSC
or others. All sales are expressly conditional on your agreement to the terms and conditions of the most recently dated version of SMSC's standard
Terms of Sale Agreement dated before the date of your order (the "Terms of Sale Agreement"). The product may contain design defects or errors
known as anomalies which may cause the product's functions to deviate from published specifications. Anomaly sheets are available upon request.
SMSC products are not designed, intended, authorized or warranted for use in any life support or other application where product failure could cause
or contribute to personal injury or severe property damage. Any and all such uses without prior written approval of an Officer of SMSC and further
testing and/or modification will be fully at the risk of the customer. Copies of this document or other SMSC literature, as well as the Terms of Sale
Agreement, may be obtained by visiting SMSC’s website at http://www.smsc.com. SMSC is a registered trademark of Standard Microsystems
Corporation (“SMSC”). Product names and company names are the trademarks of their respective holders.
SMSC DISCLAIMS AND EXCLUDES ANY AND ALL WARRANTIES, INCLUDING WITHOUT LIMITATION ANY AND ALL IMPLIED WARRANTIES
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE, AND AGAINST INFRINGEMENT AND THE LIKE, AND ANY AND
ALL WARRANTIES ARISING FROM ANY COURSE OF DEALING OR USAGE OF TRADE.
IN NO EVENT SHALL SMSC BE LIABLE FOR ANY DIRECT, INCIDENTAL, INDIRECT, SPECIAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES;
OR FOR LOST DATA, PROFITS, SAVINGS OR REVENUES OF ANY KIND; REGARDLESS OF THE FORM OF ACTION, WHETHER BASED ON
CONTRACT; TORT; NEGLIGENCE OF SMSC OR OTHERS; STRICT LIABILITY; BREACH OF WARRANTY; OR OTHERWISE; WHETHER OR
NOT ANY REMEDY OF BUYER IS HELD TO HAVE FAILED OF ITS ESSENTIAL PURPOSE, AND WHETHER OR NOT SMSC HAS BEEN
ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
Rev. 05-21-04
PRODUCT PREVIEW
2
SMSC DME1737
General Description
The DME1737 is a 3.3V (Super I/O Block is 5V tolerant) PC99/PC2001 compliant Super I/O controller
with an LPC interface. DME1737 also includes Hardware Monitoring capabilities, enhanced Security
features, Power Control logic and Motherboard Glue logic.
The DME1737's hardware monitoring capability includes temperature, voltage and fan speed
monitoring. It has the ability to alert the system to out-of-limit conditions and automatically control the
speeds of multiple fans. There are four analog inputs for monitoring external voltages of +5V, +5VTR,
+12V and Vccp (core processor voltage), as well as internal monitoring of the SIO's VCC, VTR, and
Vbat power supplies. The DME1737 includes support for monitoring two external temperatures via
thermal diode inputs and an internal sensor for measuring ambient temperature. The nHWM_INT pin
is implemented to indicate out-of-limit temperature, voltage, and FANTACH conditions. The hardware
monitoring block of the DME1737 is accessible via the System Management Bus (SMBus). The same
interrupt event reported on the nHWM_INT pin also creates PME wakeup events and speaker alarm
annunciation.
The Motherboard Glue logic includes various power management and system logic including
generation of nRSMRST, SMBus buffers, and buffered PCI reset outputs.
The DME1737 incorporates complete legacy Super I/O functionality including an 8042 based keyboard
and mouse controller, an IEEE 1284, EPP, and ECP compatible parallel port, one serial port that is
16C550A UART compatible, one IrDA 1.0 infrared ports, and a floppy disk controller with SMSC's true
CMOS 765B core and enhanced digital data separator, The true CMOS 765B core provides 100%
compatibility with IBM PC/XT and PC/AT architectfures and is software and register compatible with
SMSC's proprietary 82077AA core. System related functionality, which offers flexibility to the system
designer, General Purpose I/O control functions, control of two LED's, and fan control using fan
tachometer inputs and pulse width modulator (PWM) outputs
The DME1737 is ACPI 1.0/2.0 compatible and therefore supports multiple low power-down modes. It
incorporates sophisticated power control circuitry (PCC), which includes support for keyboard and
mouse wake-up events.
The DME1737 supports the ISA Plug-and-Play Standard register set (Version 1.0a). The I/O Address,
DMA Channel and hardware IRQ of each logical device in the DME1737 may be reprogrammed
through the internal configuration registers. There are up to 480 (960 - Parallel Port) I/O address
location options, a Serialized IRQ interface, and Three DMA channels.
SMSC DME1737
PRODUCT PREVIEW
3
Rev. 05-21-04
Block Diagram
SPEAKER
LED1*
WDT*
WD
T
LEDs
CLK32
CLOCKI
CLOCK
GEN
Speaker
SER_IRQ
PCI_CLK
LAD[3:0]
LFrame#
LDRQ#
PCI_RESET#
IO_PME_S3*
IO_PME_S5*
IO_SMI*
GP1[0:4]*,
GP21*,GP22*
GP27*, GP32*,GP33*
GP36*, GP37* ,
GP4[0,2,3]*
GP5[0:1]*, GP6[0:1]*
nMTR0, nTRK0, InNDEX
nW GATE, nHDSEL
DRVDEN0*,nW RTPRT
nDIR, nSTEP
nDSKCHG, nDS0,
nRDATA,nW DATA
SERIAL
IRQ
Internal Bus
(Data, Address, and Control lines)
LPC
Bus Interface
Multi-Mode
Parallel Port
with
ChiProtect
TM
/FDC
MUX
(see
LPC47B27x)
High-Speed
16550A
UART
PORT 1
LED2*
PD[7,0]
BUSY, SLCT, PE,
nERROR, nACK
nSTROBE, nINIT,
nSLCTIN, nALF
TXD1*, RXD1
nCTS1, nRTS1*
nDSR1, nDTR1
nDCD1, nRI1
TXD2 (IRTX)*,
RXD2 (IRRX)*
CTS2*, RTS2 *
DSR2*, DTR2*
DCD2*, RI2*
Power Mgmt
High-Speed
16550A
UART
PORT 2
32 byte
Security
Key
Register
General
Purpose
I/O
SMSC
Proprietary
82077
Compatible
Floppydisk
Controller with
Digital Data
Separator &
W rite Precom-
pensation
PCI Reset
Outputs
Keyboard/Mouse
8042
controller
nIDE_RSTDRV*
nPCIRST_OUT[1:4]*
MCLK*, MDAT*
A20M*
nKBDRST*
KCLK*,KDAT*
nFPRST, PB_IN#
PW RGD_PS
SLP_S3#, SLP_S5#
`
PW RGD_CPU ,
PW RGD_3V
n3VSB_GAT E
n3V_GATE
nRSMRST
PCI_RESET#
14.318Mhz
HWN_INT
SLP_S3#
SLP_S5#
96 Mhz
VCC
Vbat
VTR
SDA1
SCLK1
SDA2
SCLK2
SMbus
Isola-
tion
Switch
S
M
b
u
s
SDA
SCLK
Power Control
and Recovery
Hardware
Monitor
Intruder
Detection
nHWM_INT
VID0
VID1
VID2
VID3
VID4
VID5 / FANTACH3
+5V_IN
+5VTR_IN
VCCP_IN
+12V_IN
Remote1-
Remote1+
Remote2-
Remote2+
PWM1/xTest Out
PWM2
PWM3/ ADDR_EN#
FANTACH1
FANTACH2
FANTACH4/ADDR_SEL
PWMA*, PWMB*
FANTACHA*
FANTACHB*
nINTRD_IN
Note 1:
This diagram does not show power and
ground connections.
Note 2:
Signal names followed by an asterisk (*) are
located on multifunction pins. This diagram is
designed to show the various functions available on
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