PM0020 datasheet(65/87 Pages) STMICROELECTRONICS

65 / 87 page

PM00020

ISC logic description

65/87

12.4.3

IDcode register

12.4.4

Usercode register

12.4.5

MFG register

Bit 2

READY/BUSY: Ready/Busy status bit

0: Busy*

1: Ready

This bit goes low 1us after an internal ERASE, PROGRAM, READ, or BLANK

CHECK operation is initiated. The polling loop which checks busy status, for

PROGRAM or ERASE operations, must not begin before the 1us delay. This will

avoid a false end of operation status. BUSY status should be polled to

determine when any operation on the Flash is over.

Bits 1:0

ISC_ERROR:

These bits comply with IEEE 1532 standard.

The ISC Error bits indicate the ISC status of the previously executed instruction.

They are updated any time a new instruction is loaded. The ISC Error bits

indicate error only if an ISC instruction is loaded and the part is not in ISC mode.

00: N/A.

01: Error

10: Success (default)

11: N/A.

IDcode[31:0]

Bits 31:0

IDCode

Usercode[31:0]

Bits 31:0

Usercode

32 bits shift out only for USERCODE instruction

32 bits shift in of user code data for ISC_PROGRAM_UC instruction

MFG[31:0]

Bits 31:0

Manufacturing information. Factory use only.

PM0020 Datasheet(PDF) 65 Page - STMicroelectronics