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FM3104 Dataheets PDF



Part Number FM3104
Manufacturers Ramtron
Logo Ramtron
Description (FM3104 - FM31256) Integrated Processor Companion
Datasheet FM3104 DatasheetFM3104 Datasheet (PDF)

www.DataSheet4U.com Product Preview FM3104/16/64/256 Integrated Processor Companion with Memory Features High Integration Device Replaces Multiple Parts • Serial Nonvolatile Memory • Real-time Clock (RTC) • Low Voltage Reset • Watchdog Timer • Early Power-Fail Warning/NMI • Two 16-bit Event Counters • Serial Number with Write-lock for Security Ferroelectric Nonvolatile RAM • 4Kb, 16Kb, 64Kb, and 256Kb versions • Unlimited Read/Write Endurance • 10 year Data Retention • NoDelay™ Writes Real-tim.

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www.DataSheet4U.com Product Preview FM3104/16/64/256 Integrated Processor Companion with Memory Features High Integration Device Replaces Multiple Parts • Serial Nonvolatile Memory • Real-time Clock (RTC) • Low Voltage Reset • Watchdog Timer • Early Power-Fail Warning/NMI • Two 16-bit Event Counters • Serial Number with Write-lock for Security Ferroelectric Nonvolatile RAM • 4Kb, 16Kb, 64Kb, and 256Kb versions • Unlimited Read/Write Endurance • 10 year Data Retention • NoDelay™ Writes Real-time Clock/Calendar • Backup Current under 1 µA • Seconds through Centuries in BCD format • Tracks Leap Years through 2099 • Uses Standard 32.768 kHz Crystal (6pF) • Software Calibration • Supports Battery or Capacitor Backup Processor Companion • Active-low Reset Output for VDD and Watchdog • Programmable VDD Reset Trip Point • Manual Reset Filtered and De-bounced • Programmable Watchdog Timer • Dual Battery-backed Event Counter Tracks System Intrusions or other Events • Comparator for Early Power-Fail Interrupt • 64-bit Programmable Serial Number with Lock Fast Two-wire Serial Interface • Up to 1 MHz Maximum Bus Frequency • Supports Legacy Timing for 100 kHz & 400 kHz • Device Select Pins for up to 4 Memory Devices • RTC, Supervisor Controlled via 2-wire Interface Easy to Use Configurations • Operates from 2.7 to 5.5V • Small Footprint 14-pin SOIC • Low Operating Current • -40°C to +85°C Operation Description The FM31xxx is a family of integrated devices that includes the most commonly needed functions for processor-based systems. Major features include nonvolatile memory available in various sizes, realtime clock, low-VDD reset, watchdog timer, nonvolatile event counter, lockable 64-bit serial number area, and general purpose comparator that can be used for an early power-fail (NMI) interrupt or other purpose. The family operates from 2.7 to 5.5V. Each FM31xxx provides nonvolatile RAM available in sizes including 4Kb, 16Kb, 64Kb, and 256Kb versions. Fast write speed and unlimited endurance allow the memory to serve as extra RAM or conventional nonvolatile storage. This memory is truly nonvolatile rather than battery backed. The real-time clock (RTC) provides time and date information in BCD format. It can be permanently powered from external backup voltage source, either a battery or a capacitor. The timekeeper uses a common external 32.768 kHz crystal and provides a calibration mode that allows software adjustment of timekeeping accuracy. This is a product in development. Characteristic data and other specifications are subject to change without notice. The processor companion includes commonly needed CPU support functions. Supervisory functions include a reset output signal controlled by either a low VDD condition or a watchdog timeout. /RST goes active when VDD drops below a programmable threshold and remains active for 100 ms after VDD rises above the trip point. A programmable watchdog timer runs from 100 ms to 3 seconds. The watchdog timer is optio.


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