PM0020 datasheet(72/87 Pages) STMICROELECTRONICS

Part #	PM0020

Description	STR91xFA Flash programming manual

PDF	87 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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72 / 87 page

ISC logic description

PM00020

72/87

12.5.10

ISC CONFIGURATION

Description:

Shift out sector protect and bits and CSx and LVD configuration, Lock OTP

bit.

Requirement:

None

Configuration

Shift-In:

64 bits don't care

Shift-Out:

64 bits Configuration

Mode:

ISC and PSD

Security:

Fully functional

Sector-Protect protects the Main and Secondary Flash from being programmed/erased by

the controller. Once ISC is active, Sector-Protect has no impact on ISC. ISC can write to any

sector regardless of protection status. Note that this is different from security. Configuration

info is loaded upon power up to be read out during ISC_CONFIGURATION instruction.

Table 35.

ISC CONFIGURATION sequence

Step

Tap activity

Comment

Run-Test/Idle

Start

IR-Scan

Load ISC-CONFIGURATION

2DR-Scan

Shift out sector protect, Csx,

LVD configuration bits and Lock

OTP information

Run-Test/Idle

End

PM0020 Datasheet(PDF) 72 Page - STMicroelectronics