ST20C4 datasheet(62/212 Pages) STMICROELECTRONICS

Datenblatt-Suchmaschine für elektronische Bauteile

ST20C4 Datenblatt(PDF) 62 Page - STMicroelectronics

Teilenummer	ST20C4

Bauteilbeschribung	Instruction Set Reference Manual

PDF	212 Pages

Scroll/Zoom	100%

Hersteller	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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62 / 212 page

cword

62/212

cword

check word

Code: 25 F6

Description: Check that the value in Breg can be represented as an N-bit signed

integer. Areg contains 2(N-1) to indicate the value of N (i.e. bit N-1 of Areg is set to 1

and all other bits are set to zero).

Definition:

if (Breg

<−Areg) or (Breg ≥ Areg)

IntegerError

Areg

′← Breg

Breg

′← Creg

Creg

′← undefined

Error signals:

IntegerError signalled if Breg is not in range.

Comments:

The result of the instruction is undefined if Areg is not an integral power of 2.

Undefined if Areg has more than one bit set.

Secondar y instruction.

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