SH7721 datasheet(204/1524 Pages) RENESAS

Part #	SH7721

Description	Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series

PDF	1524 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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Section 3 DSP Operating Unit

Rev. 3.00 Jan. 18, 2008 Page 142 of 1458

REJ09B0033-0300

The definition of the DC bit is selected by the CS0 to CS2 (condition selection) bits in DSR. The

DC bit result is

(1)

Carry or Borrow Mode: CS[2:0] = B'000

The DC bit is always cleared to 0.

(2)

Negative Value Mode: CS[2:0] = B'001

The DC bit is set when the operation result is a negative value, and cleared to 0 when the

operation result is zero or a positive value.

(3)

Zero Value Mode: CS[2:0] = B'010

The DC bit is set when the operation result is zero; otherwise it is cleared to 0.

(4)

Overflow Mode: CS[2:0] = B'011

The DC bit is always cleared to 0.

(5)

Signed Greater Than Mode: CS[2:0] = B'100

The DC bit is set to 1 when the operation result is a positive value; otherwise it is cleared to 0.

(6)

Signed Greater Than or Equal Mode: CS[2:0] = B'101

The DC bit is set to 1 when the operation result is zero or a positive value; otherwise it is cleared

to 0.

SH7721 Datasheet(PDF) 204 Page - Renesas Technology Corp