PM0020 datasheet(63/87 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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63 / 87 page

PM00020

ISC logic description

63/87

12.4

12.4.1

Instruction Register

Note:

With the shifting in of any instruction, the above status will be shifted out.

Sector Protection bits (one for each sector of the main and secondary Flash)

0: Sector is not protected from write or erase MCU operations..

1: Sector is protected from write or erase MCU operations

OTP Lock bit

0: Write to unprogrammed OTP location is allowed.

1: Write to OTP location is inhibitedt

765

432

N/A

SECURITY

INT_ERROR

READY/BUSY

MODE

Bit 7

N/A

Bit 6

SECURITY: Security bit (Readout protection).

0: Unsecured device.

1: Secured device.

Bits 5:4

INT_ERROR: Internal Error/Program Error

00: N/A

01: Fail

10: Success (default)

11: N/A.

Bit 3

READY/BUSY:

0:Busy* (see note)

1: Ready

Bit 2

MODE:

0: PSD mode

1: ISC mode

Bit 1

0: IEEE1149.1 mandatory

Bit 0

1: IEEE1149.1 mandatory

PM0020 Datasheet(PDF) 63 Page - STMicroelectronics

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