PM0020 datasheet(76/87 Pages) STMICROELECTRONICS

76 / 87 page

ISC logic description

PM00020

76/87

12.5.15

ISC_CLR_STATUS

Description:

Clear/reset ISC and other modules (ie. Flash) if error occurred

Requirement:

Part is in ISC mode, error status exists.

ISC_Default

Shift-In:

8 bits don't care

Shift-Out:

8 bits status

Mode:

ISC

Security:

Fully functional

DR-Scan in steps 2 & 4 is optional.

If the part isn't in ISC mode, the instruction will not be executed and an ISC_ERROR is

issued.

12.5.16

ISC PROGRAM

Description:

Program a sector

Requirement:

Part is in ISC mode, unsecured part

ISC_Data

Shift-In:

64 bits data

Shift-Out:

64 bits don't care

Mode:

ISC

Security:

Blocked

Table 40.

ISC_CLR_STATUS sequence

Step

Tap activity

Comment

Run-Test/Idle

Start

IR-Scan

Load ISC_CLR_STATUS

2DR-Scan

Shift out status (should still

show error)

Run-Test/Idle

Clear status (including module's

error), wait 50uS

DR-Scan

Shift out status - expect no error

Run-Test/Idle

End

Table 41.

Main and Secondary Flash sectors program flow

Step

Tap Activity

Comment

Run-Test/Idle

Start

IR-Scan

Load ISC_ADDRESS_SHIFT

DR-Scan

Shift in 8 bits sector address

IR-Scan

Load ISC_PROGRAM

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