PSD913F2 datasheet(24/91 Pages) STMICROELECTRONICS

Part #	PSD913F2

Description	Configurable Memory System on a Chip for 8-Bit Microcontrollers

PDF	91 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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24 / 91 page

PSD935G2

PSD9XX Family

9.1.1.7.2 Data Toggle (cont.)

It is suggested (as with all Flash memories) to read the location again after the embedded

programming algorithm has completed to compare the word that was written to Flash with

the word that was intended to be written.

When using the Data Toggle method after an erase instructin, Figure 5 still applies. DQ6

will toggle until the erase operation is complete. A ‘1’ on DQ5 will indicate a timeout failure

of the erase operation, a ‘0’ indicates no error. The MCU can read any even location within

the sector being erased to get DQ6 and DQ5.

PSDsoft generates ANSI C code functions which implement these Data Toggling

algorithms.

The

PSD935G2

Functional

Blocks

(cont.)

Figure 5. Data Toggle Flow Chart

START

READ

DQ5 & DQ6

YES

DQ6

TOGGLE

DQ5

DQ6

TOGGLE

READ DQ6

FAIL

Program/Erase

Operation Failed

Issue Reset Instruction

PASS

Program/Erase

Operation is

Completed

PSD913F2 Datasheet(PDF) 24 Page - STMicroelectronics