FM33256/FM3316 SPI Companion w/ FRAM

Rev. 2.0

Feb. 2009

Page 3 of 28

Figure 1. Block Diagram

Ordering Information

Base

Configuration

Memory

Size

Operating

Voltage

Max. Clock

Freq.

Reset Thresholds

Ordering Part Number

FM33256

256Kb

2.7-3.6V

16 MHz

2.6V, 2.75, 2.9, 3.0V

FM33256-G

256Kb

2.7-3.6V

16 MHz

2.6V, 2.75, 2.9, 3.0V

FM33256-GTR (tape&reel)

FM3316

16Kb

2.7-3.6V

16 MHz

2.6V, 2.75, 2.9, 3.0V

FM3316-G

16Kb

2.7-3.6V

16 MHz

2.6V, 2.75, 2.9, 3.0V

FM3316-GTR (tape&reel)

Other memory configurations may be available. Please contact the factory for more information.

FRAM

Array

SPI

Interface

SCK

SI

RST

CS

PFI

VDD

VBAK

RTC

-

+

RTC Registers

CNT

Special

Function

Registers

S/N

X1

X2

LockOut

+

-

1.5V

Watchdog

LV Detect

Switched Power

512Hz/SqW

RTC Cal.

Battery Backed

Nonvolatile

SO

PFO

ACS

Alarm

Event

Counter

Alarm

NV/BB User Programmable

Manual Reset