HE84G762B datasheet(45/60 Pages) KB

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KING BILLION ELECTRONICS CO., LTD

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HE84G762B

HE80004 Series

June 1, 2004

V0.92

This specification is subject to change without notice. Please contact sales person for the latest version before use.

MO_LVRE

Function

Disable LVR

Enable LVR

The voltage detection circuit is temperature compensated to prevent the detection voltage from drifting

with temperature variation.

Vdet

Vrst

VDD

Vrls

20. Infrared output

To achieve an IR output with programmable frequency and duty cycle, two 7-bit registers are employed

here. The IRH register represents the period (on FCK clock number) of output high, while IRL register

represents the period of output low. With this mechanism, the output IR frequency is equal to

FCK/(IRH+IRL), and the high duty cycle ratio is equal to IRH/(IRH+IRL). To make the IRO as output

pin alone, either IRH or IRL can be set as 0. When IRH is 0, the IRO output is a DC low. On the contrary,

if IRL is 0, the output is a DC high. Special care in hardware implementation is also taken according to

the MO_IRO (mask option to determine the default state of the IRO) to avoid glitch when PWM output is

disabled.

HE84G762B Datasheet(PDF) 45 Page - King blillion Electronics Co.,Ltd.