SST89E54RD2A(2011) View Datasheet(PDF) - Silicon Storage Technology

Part Name

Description

View to exact match

SST89E54RD2A
(Rev.:2011)

FlashFlex MCU

Silicon Storage Technology 

A Microchip Technology Company

FlashFlex MCU

SST89E54RD2A/RDA / SST89E58RD2A/RDA

SuperFlash Address Registers (SFAH)

Location

7

6

B4H

Not Recommended for New Designs

5

4

3

2

1

SuperFlash High Order Byte Address Register

0

Reset Value

00H

Symbol

Function

SFAH

Mailbox register for interfacing with flash memory block. (High order address

register).

SuperFlash Data Register (SFDT)

Location

7

6

5

4

3

2

1

0

Reset Value

B5H

SuperFlash Data Register

00H

Symbol

SFDT

Function

Mailbox register for interfacing with flash memory block. (Data register).

SuperFlash Status Register (SFST) (Read Only Register)

Location

7

6

5

4

B6H SB1_i SB2_i SB3_i

-

3

2

1

EDC_i FLASH_BU

-

SY

Symbol

SB1_i

SB2_i

SB3_i

EDC_i

FLASH_BUSY

Function

Security Bit 1 status (inverse of SB1 bit)

Security Bit 2 status (inverse of SB2 bit)

Security Bit 3 status (inverse of SB3 bit)

Please refer to Table 25 for security lock options.

Double Clock Status

0: 12 clocks per machine cycle

1: 6 clocks per machine cycle

Flash operation completion polling bit.

0: Device has fully completed the last IAP command.

1: Device is busy with flash operation.

0

Reset Value

-

xxxxx0xxb

©2011 Silicon Storage Technology, Inc.

22

DS25114A

12/11

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