PM0020 datasheet(54/87 Pages) STMICROELECTRONICS

54 / 87 page

Erase and program operation

PM00020

54/87

If OTP sector is selected,

Check if OTP_LOCK bit = “1”,

- If yes, exit with warning

- If no,

(a) upload OTP sector from DUT

(b) copy the last 2 bytes (16 bits)

from uploaded buffer and

overwrite to the program buffer

OTP_LOCK bit, if applicable.

/ Check if OTP_LOCK bit is set

ISC-CONFIGURATION

if OTP_LOCK bit = “1”,

exit with message indicating OTP Lock-bit status

/upload OTP sector from DUT

ISC-READ(OTP Sector)

if read error, exit with error

else copy the last 2 bytes (16 bits) from uploaded buffer

and overwrite to the program buffer

/ program OTP sector

ISC-PROGRAM (OTP Sector, data)

if failed

{

ISC-CLR-STATUS

exit with error

}

/If file has OTP_LOCK bit = “1”, program OTP_LOCK bit

ISC-PROGRAM (Lock-bit Sector, data)

if failed

{

ISC-CLR-STATUS

exit with error

}

If security bit is set (D0=0), program

security-bit

/program security bit

ISC-PROGRAM-SECURITY

if failed

{

ISC-CLR-STATUS

report error and exit

}

Disable ISC mode

ISC-DISABLE

Disable Turbo Programming Mode

Disabling by either power-down or taking JTRSTn to low

Table 26.

Erase and program operation description (continued)

Description

Flow in sequence

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