M58PR256J datasheet(44/114 Pages) STMICROELECTRONICS

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Program operations

M58PR256J, M58PR512J

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5.8

Buffer Enhanced Factory Program method

The Buffer Enhanced Factory Program method is based on the Buffer Enhanced Factory

Program command.

The Buffer Enhanced Factory Program method is supported by the Program Regions

regardless of the program mode they are configured in.

In this program method, the Program Region (1KB) must be filled entirely, regardless of the

Program mode used. If the size of the data to be written is less than 1KB, the remaining

addresses in the Program Region must be filled with FFFFh.

When using the Buffer Enhanced Factory Program method in a Program Region configured

in the Control Program mode, the addresses to be programmed must be located in the ’A’

half of the Program Regions’ Segments (A3 = 0) and the ’B’ half of the Segments (A3 = 1)

must be filled only with FFFFh.

See Section 4: Command interface for a detailed description of the Buffer Enhanced Factory

Program command.

Table 11.

Program methods available with each Program mode

Program Mode

Program Methods(1)

X means available.

Single Word

Program

Buffered Program

Buffer Program

Buffer Enhanced Factory

Program

Control Program Mode

Object Program Mode

Table 12.

Relationships between Program methods and Program modes

Program

Region Status

Address Bit

A3 Value

Program Method

Buffered Program

Single Word Program

Buffer

Program

Buffer Enhanced

Factory Program

Erased

A3 = 0 (’A’ Half)

Program Region configured in Control

Program mode

Program Region

configured in Control

Program mode

A3 = 1 (’B’ Half)

Program Region configured in Object

Program mode

NOT ALLOWED

Program aborted, Status

and SR9 set

Control Program

mode

A3 = 0 (’A’ Half) Program operation successful

A3 = 1 (’B’ Half)

NOT ALLOWED

Program aborted, Status Register Error bits SR4 and SR9 set

Object Program

mode

A3 = 0 (’A’ Half) SUBSEQUENT PROGRAM NOT ALLOWED

Program aborted, Status Register Error bits SR4 and SR8 set

A3 = 1 (’B’ Half)

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