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SST89E54RDA-33-C-TQIE

FlashFlex MCU

Silicon Storage Technology 

FlashFlex MCU

SST89E54RD2A/RDA / SST89E58RD2A/RDA

SST89V54RD2A/RDA / SST89V58RD2A/RDA

Data Sheet

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

3

2

1

B6H

SB1_i

SB2_i

SB3_i

-

EDC_i FLASH_BUSY

-

0

Reset Value

-

xxxxx0xxb

Symbol

Function

SB1_i

Security Bit 1 status (inverse of SB1 bit)

SB2_i

Security Bit 2 status (inverse of SB2 bit)

SB3_i

Security Bit 3 status (inverse of SB3 bit)

Please refer to Table 9-1 for security lock options.

EDC_i

Double Clock Status

0: 12 clocks per machine cycle

1: 6 clocks per machine cycle

FLASH_BUSY Flash operation completion polling bit.

0: Device has fully completed the last IAP command.

1: Device is busy with flash operation.

©2007 Silicon Storage Technology, Inc.

25

S71339-01-000

1/07

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