SST89C54 View Datasheet(PDF) - Silicon Storage Technology

Part Name

Description

Manufacturer

SST89C54

FlashFlex51 MCU

Silicon Storage Technology 

FlashFlex51 MCU

SST89C54 / SST89C58

Preliminary Specifications

TABLE 3B: FLASH MEMORY PROGRAMMING SFRS

Symbol Description

SFST

SFCF

SFCM

SFDT

SFAL

SFAH

SuperFlash Status

SuperFlash

Configuration

SuperFlash

Command

SuperFlash Data

SuperFlash

Address Low

SuperFlash

Address High

Direct

Address

B6h

B1h

B2h

B5h

B3h

B4h

Bit Address, Symbol, or Alternative Port Function

MSB

LSB

SECD[2:0]

- BUSY Flash_busy -

-

VIS IAPEN -

-

-

-

MAP_EN

RESET

Value

xxx00000b

000000xxb

FIE

FCM

00h

SuperFlash Data Register

00h

SuperFlash Low Order Byte Address Register – A7 to A0 (SFAL)

00h

SuperFlash High Order Byte Address Register – A15 to A8 (SFAH) 00h

344 PGM T3B.4

SuperFlash Status Register (SFST) (Read Only Register)

Location

7

6

5

4

3

2

1

0

0B6h SECD2 SECD1 SECD0

–

Busy Flash_busy –

–

Symbol

SECD2

SECD1

SECD0

BUSY

Flash_busy

Function

Security bit 1.

Security bit 2.

Security bit 3.

Please refer to Table 8 for security lock options.

Burst-Program completion polling bit.

1: Device is busy with flash operation.

0: Device is available for next Burst-Program operation.

Flash operation completion polling bit.

1: Device is busy with flash operation.

0: Device has fully completed the last command, including Burst-Program.

Reset Value

xxx00000b

© 2000 Silicon Storage Technology, Inc.

14

344-2 8/00

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