PM0020 datasheet(51/87 Pages) STMICROELECTRONICS

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PM00020

JTAG sequence

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5.13

ISC-ERASE

5.14

ISC-BLANK-CHECK sequence

Table 23.

ISC-ERASE sequence

Step

Tap Activity

Comment

Run-Test/Idle

Start

IR-Scan

Load 5-bit BYPASS + ISC_ERASE

DR-Scan

Shift in 1-bit BYPASS + sector(s) to be erased.

‘1’ erase; ‘0’ don’t erase

Run-Test/Idle

Erase starts

Begin polling

IR-Scan

Load 5-bit BYPASS + ISC-NOOP

DR-Scan

Shift out 1-bit BYPASS + status

Repeat step 5 until ready = 1

Run-Test/Idle

End

Table 24.

ISC-BLANK-CHECK sequence

Step

Tap Activity

Comment

Run-Test/Idle

Start

IR-Scan

Load 5-bit BYPASS + ISC_BLANK_CHECK

DR-Scan

Shift in 1-bit BYPASS + sector(s) to be blank checked.

‘1’ check; ‘0’ don’t check

Run-Test/Idle

Blank check starts, wait 40ms

DR-Scan

Shift out 1-bit BYPASS + sector blank info.

‘1’ = Sector selected and blank

‘0’ = Sector either not selected or not blank.

5IR-Scan

Load 5-bit BYPASS + ISC_NOOP (to replace

ISC_BLANK_CHECK)

Run-Test/Idle

End

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