E909-05 Datasheet, PDF(24/67 Page) ELMOS Semiconductor AG – The HALIOS® multi purpose optical sensor is based on an optical bridge which provides a contactless detec-tion of gestures (e.g. movement of a finger).

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E909-05 Datasheet, PDF (24/67 Pages) ELMOS Semiconductor AG – The HALIOS® multi purpose optical sensor is based on an optical bridge which provides a contactless detec-tion of gestures (e.g. movement of a finger).

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HALIOSÂ® MULTI-PURPOSE OPTICAL SENSOR WITH HIGH LIGHT IMMUNITY

E909.05

PRELIMINARY INFORMATION AUG 02, 2011

6.3.3 Status Register (SR)

The status register (SR/R2), used as a source or destination register, can be used in the register mode only

addressed with word instructions. The remaining combinations of addressing modes are used to support the

constant generator.

Bit

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

Reset value

0000000000000000

Internal access R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W

External access R R R R R R R R R R R R R R R R

Bit Description

Bit 8 : V

Bit 5 : CLK OFF

Bit 4 : CPU OFF

BIT3 : GIE

Bit2 : N

Bit1 : Z

BIT0 : C

Table 6.3.3.1: Status Register

V: Overflow bit

This bit is set when the result of an arithmetic operation overflows the signed-variable range.

CLKOFF: Stop flag

CPU clock gated

CPUOFF: Standby flag

CPU halted

GIE: Global Interrupt Enable

N: Negative bit

This bit is set when the result of a byte or word operation is negative and cleared when the result is not negat-

ive. Word operation: N is set to the value of bit 15 of the result Byte operation: N is set to the value of bit 7 of

the result

Z: Zero bit

This bit is set when the result of a byte or word operation is 0 and cleared when the result is not 0.

C: Carry bit

This bit is set when the result of a byte or word operation

produced a carry and cleared when no carry occurred.

6.3.4 Constant Generation Registers CG1 and CG2

Six commonly-used constants are generated with the constant generator registers R2 and R3, without requir-

ing an additional 16-bit word of program code. The constants are selected with the source-register address-

ing modes (As), as described in the table below:

Value

-----

(0)

00004h

Remarks

Absolute Address Mode

+4, bit processing

This document contains information on a pre-production product. ELMOS Semiconductor AG reserves the right to change specifications and information herein without notice.

ELMOS Semiconductor AG

Data Sheet 24 / 67

QM-No.: 25DS0014E.00

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