SUMMIT
MICROELECTRONICS, Inc.
SMS8198
Philips TriMedia™ Processor Companion Supervisor
With a 16K-bit 2-wire Serial Memory
FEATURES
• Designed to operate with the Philips
TriMedia Processor
• Coordinating the System Reset Function and
Providing the Processor’s Configuration
Memory
• Multiple V
TRIP
Thresholds
- No External Components Required
•
Guaranteed Reset Assertion to V
CC
-1V
• Reset is an I/O
- Allows System Reset Clean up
- Provides a De-bounced Manual Reset Func-
tion
• Industry Standard 2-wire Serial Interface
• Hardware Write Lockout Function
• High Reliability
- Endurance: 100,000 write cycles
- Data Retention: 100 Years
OVERVIEW
The SMS8198 is a precision supervisory circuit designed
specifically as a companion chip for the Philips TriMedia
Processor family. The SMS8198 monitors the power
supply and holds the system in reset whenever V
CC
is
below the V
TRIP
threshold.
In addition to the supervisory function, the SMS8198 has
16K-bits of nonvolatile memory that is used by the
TriMedia processor as the boot memory.
The SMS8198 provides 16K-bits of memory that is acces-
sible through the industry standard 2-wire serial interface.
By integrating a precision supervisory circuit and the
hardware WP input, the SMS8198 becomes the perfect
companion chip for the Philips TriMedia processor family.
Its functions are integral to the boot hardware operation of
the TriMedia processors.
BLOCK DIAGRAM
VCC
8
SCL
SDA
6
5
NONVOLATILE
MEMORY
ARRAY
WRITE
CONTROL
7
WP
2
PROGRAMMABLE
RESET PULSE
GENERATOR
TRI_RESET#
+
–
VTRIP
RESET
CONTROL
1.26V
4
GND
SUMMIT MICROELECTRONICS, Inc.
•
300 Orchard City Drive, Suite 131
•
Campbell, CA 95008
•
2036 T BD 2.0
Telephone 408-378-6461
•
Fax 408-378-6586
•
www.summitmicro.com
© SUMMIT MICROELECTRONICS, Inc. 2000
2036 5.0 4/18/00
Characteristics subject to change without notice
1
SUMMIT [ SUMMIT MICROELECTRONICS, INC. ]
