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PDF FM3580MT20 Data sheet ( Hoja de datos )
| Número de pieza | FM3580MT20 | |
| Descripción | 5-Bit VID Controller with PC Security Element | |
| Fabricantes | Fairchild Semiconductor | |
| Logotipo |  |
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January 2002
FM3580
5-Bit VID Controller with PC Security Element
General Description
The FM3580 is an standard 5-bit VID controller with an integrated
a Security controller. FM3580 extends the typical VID feature to a
PC motherboard by offering a security function which deters
cloning of PC motherboards.
FM3580’s Security block generates a new pseudo-random code
each time one of its internal registers is read. The PC BIOS is
programmed to poll pseudo-random code from the FM3580 at
frequent intervals. If the appropriate code is not read, the system
shuts down, or refuses to boot at power-up. The VID controller
portion of FM3580 is identical to FM3560 and is pin compatible
with FM3560.
FM3580 is designed using low power CMOS technology.
Features
I VID controller similar to FM3560
I Integrated “anti-clone” Security controller
I Configurable Output type
— TTL
— Open-Drain
I Pin compatible to FM3560
I SMBus interface to Security/VID controls
I Operating VCC : 2.7V to 5.5V
I Operating Temp: 0°C to +70°C
I Package: 20-Pin TSSOP
Block Diagram
SCL
SDA
ASEL
WP
Level
Mux_Sel
/Override
I[4:0]
SMbus
Interface &
Control
Control
Logic
Security Encoder
EEPROM &
Register Array
Muliplexer &
Output Logic
Non_Mux_Out
Y[4:0]
© 2002 Fairchild Semiconductor Corporation
FM3580 Rev. A.5
1
www.fairchildsemi.com
1 page  
SMBus Timing
tF
SCL
SDA
IN
tSU:STA
tLOW
tHD:STA
SDA
OUT
tAA
SMBus START/STOP Condition
SCL
tHIGH
tHD:DAT
tR
tLOW
tSU:DAT
tDH
tSU:STO
SDA
tBUF
START
CONDITION
SMBus ACK Pulse
SCL FROM
MASTER
DATA OUTPUT
FROM
TRANSMITTER
DATA OUTPUT
FROM
RECEIVER
Clock Stretching
START
CONDITION
1
SCL
STOP
CONDITION
89
tDH
tAA
ACKNOWLEDGE
PULSE
FM3580 CLOCK
STRETCHING
DURING INTERNAL
WRITE CYCLE
tWP
SDA
FM3580 Rev. A.5
LAST BIT
OF
INPUT DATA
ACKNOWLEDGE STOP
PULSE
CONDITION
5
www.fairchildsemi.com
5 Page 
Physical Dimensions inches (millimeters) unless otherwise noted
Package Number MTC20
Life Support Policy
Fairchild's products are not authorized for use as critical components in life support devices or systems without the express written
approval of the President of Fairchild Semiconductor Corporation. As used herein:
1. Life support devices or systems are devices or systems which,
(a) are intended for surgical implant into the body, or (b) support
or sustain life, and whose failure to perform, when properly
used in accordance with instructions for use provided in the
labeling, can be reasonably expected to result in a significant
injury to the user.
2. A critical component is any component of a life support device
or system whose failure to perform can be reasonably ex-
pected to cause the failure of the life support device or system,
or to affect its safety or effectiveness.
Fairchild Semiconductor
Americas
Customer Response Center
Tel. 1-888-522-5372
Fairchild Semiconductor
Europe
Fax: +44 (0) 1793-856858
Deutsch Tel: +49 (0) 8141-6102-0
English Tel: +44 (0) 1793-856856
Français Tel: +33 (0) 1-6930-3696
Italiano Tel: +39 (0) 2-249111-1
Fairchild Semiconductor
Hong Kong
8/F, Room 808, Empire Centre
68 Mody Road, Tsimshatsui East
Kowloon. Hong Kong
Tel; +852-2722-8338
Fax: +852-2722-8383
Fairchild Semiconductor
Japan Ltd.
4F, Natsume Bldg.
2-18-6, Yushima, Bunkyo-ku
Tokyo, 113-0034 Japan
Tel: 81-3-3818-8840
Fax: 81-3-3818-8841
Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications.
FM3580 Rev. A.5
11 www.fairchildsemi.com
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet FM3580MT20.PDF ] | |
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