SST25LF080A datasheet(12/25 Pages) SST

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EOL Product Data Sheet

8 Mbit SPI Serial Flash

SST25LF080A

S71248-06-EOL

1/06

Auto Address Increment (AAI) Program

The AAI program instruction allows multiple bytes of data to

be programmed without re-issuing the next sequential

address location. This feature decreases total program-

ming time when the entire memory array is to be pro-

grammed. An AAI program instruction pointing to a

protected memory area will be ignored. The selected

address range must be in the erased state (FFH) when ini-

tiating an AAI program instruction.

Prior to any write operation, the Write-Enable (WREN)

instruction must be executed. The AAI program instruction

is initiated by executing an 8-bit command, AFH, followed

by address bits [A23-A0]. Following the addresses, the data

is input sequentially from MSB (Bit 7) to LSB (Bit 0). CE#

must be driven high before the AAI program instruction is

executed. The user must poll the BUSY bit in the software

status register or wait TBP for the completion of each inter-

nal self-timed Byte-Program cycle. Once the device com-

pletes programming byte, the next sequential address may

be program, enter the 8-bit command, AFH, followed by the

data to be programmed. When the last desired byte had

been programmed, execute the Write-Disable (WRDI)

instruction, 04H, to terminate AAI. After execution of the

WRDI command, the user must poll the Status register to

ensure the device completes programming. See Figure 7

for AAI programming sequence.

There is no wrap mode during AAI programming; once the

highest unprotected memory address is reached, the

device will exit AAI operation and reset the Write-Enable-

Latch bit (WEL = 0).

FIGURE 7: AUTO ADDRESS INCREMENT (AAI) PROGRAM SEQUENCE

CE#

SCK

A[23:16] A[15:8]

A[7:0]

Data Byte 1

Data Byte 2

CE#

SCK

Write Disable (WRDI)

Instruction to terminate

AAI Operation

Read Status Register (RDSR)

Instruction to verify end of

AAI Operation

Last Data Byte

DOUT

MODE 3

MODE 0

TBP

1248 F07.0

0 1 2 3 4 5 6 7 8

3233343536373839

15 16

23 24

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

01234567

0123456789 10 11 12 13 14 15

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