SST26VF040A-80ISLASHMFVAO datasheet(9/73 Pages) MICROCHIP

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DS20006292B-page 9

SST26VF040A

4.6

STATUS Register

The software STATUS register provides status on

whether the Flash memory array is available for any

read or write operation, whether the device is

write-enabled, and the state of the memory write

protection. During an internal erase or program

operation, the STATUS register may be read only to

determine the completion of an operation in progress.

Table 4-3 describes the function of each bit in the

software STATUS register.

TABLE 4-2:

After Power Cycle

After Hardware Reset

After Software Reset

Status Register Bits

Busy Bit

WEL Bit

BP0 Bit

Unchanged

BP1 Bit

Unchanged

BP2 Bit

Unchanged

BPL Bit

Unchanged

Configuration Register Bits

IOC Bit

VLP Bit

Unchanged

SEC Bit

Unchanged

WSE Bit

WSP Bit

RSTHLD Bit

Unchanged

WPEN Bit

Unchanged

TABLE 4-3:

SOFTWARE STATUS REGISTER

Bit

Name

Function

Default at

Power-Up

Read/Write

0BUSY

1 = Internal write operation is in progress

0 = No internal write operation is in progress

1WEL

1 = Device is memory write-enabled

0 = Device is not memory write-enabled

BP0

Indicate current level of block write protection (see Table 4-4)

R/W

BP1

Indicate current level of block write protection (see Table 4-4)

R/W

BP2

Indicate current level of block write protection (see Table 4-4)

R/W

BP3

Indicate current level of block write protection (see Table 4-4)

R/W

6RES

Reserved

BPL

1 = BP3, BP2, BP1, BP0 are read-only bits

0 = BP3, BP2, BP1, BP0 are read/writable

0R/W

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