FM3204 データシートの表示（PDF） - Unspecified

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FM3204

Integrated Processor Companion with Memory

Unspecified 

FM3204/16/64/256

Start

By Master

Address

Start

Address

S

Slave Address 0 A

Address MSB

A

Address LSB

AS

Slave Address 1 A

By FM32xx

Acknowledge

Figure 14. Selective (Random) Memory Read

No

Acknowledge

Stop

Data Byte

1P

Data

By Master

Start

Address & Data

S

Slave Address 0 A 0 0 0 Address A

Data Byte

Stop

AP

By FM32xx

Acknowledge

Figure 15. Byte Register Write

* Although not required, it is recommended that A5-A7 in the Register Address byte are

zeros in order to preserve compatibility with future devices.

Addressing FRAM Array in the FM32xx Family

The FM32xx family includes 256Kb, 64Kb, 16Kb, and 4Kb memory densities. The following 2-byte address field is

shown for each density.

Table 4. Two-Byte Memory Address

Part #

1st Address Byte

FM32256

x A14 A13 A12 A11 A10 A9 A8

FM3264

xx

x A12 A11 A10 A9 A8

FM3216

xx

x

x

x A10 A9 A8

FM3204

xx

x

x

x

x x A8

2nd Address Byte

A7 A6 A5 A4 A3 A2 A1 A0

A7 A6 A5 A4 A3 A2 A1 A0

A7 A6 A5 A4 A3 A2 A1 A0

A7 A6 A5 A4 A3 A2 A1 A0

Rev 2.1

Dec. 2004

Page 15 of 20

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