NJU6052 Просмотр технического описания (PDF) - Japan Radio Corporation

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NJU6052

REMOTE CONTROL COMMANDER IC

Japan Radio Corporation  

NJU6052

(5-5) HOLD

By setting “1” at the HOLD bit, the selected PWM REGISTER is held and the luminance sensor control

cannot be used. In other words, this setting works so that the luminance of the LEDs doesn’t change even if the

SENS voltage changes. The selection is initialized to the PWM REGISTER 0 by the reset. And when the standby is

released, the selection is initialized to the PWM REGISTER 0 at REV=“0” or the PWM REGISTER 7 at

REV=“1”.

(5-6) REV

By setting “1” at the REV bit, the correspondence between the PWM REGISTER and SENS voltage is

reversed.

TABLE 5 REV

REV

0

1

PWM REGISTER

PWM REGISTER0

PWM REGISTER1

PWM REGISTER2

PWM REGISTER3

PWM REGISTER4

PWM REGISTER5

PWM REGISTER6

PWM REGISTER7

PWM REGISTER7

PWM REGISTER6

PWM REGISTER5

PWM REGISTER4

PWM REGISTER3

PWM REGISTER2

PWM REGISTER1

PWM REGISTER0

(5-7) DIVIDE

By setting the DIVIDE bits, the sensor-sampling-time (tSENS) and PWM frequency (fPWM) are changed. Note

that these parameters are varied depending on the oscillation frequency (FOSC). The formula (2) gives the

sensor-sampling-time.

t sens

=

2(17+ N )

f OSC

(sec)

--- Formula (2)

TABLE 6 SENSOR SAMPLING TIME

DIVIDE

N

00

0

01

1

10

2

11

3

100kHz

1.311

2.621

5.243

10.486

200kHz

0.655

1.311

2.621

5.243

FOSC

400kHz

0.328

0.655

1.311

2.621

800kHz

0.164

0.328

0.655

1.311

UNIT : sec

Ver.2004-02-26

-9-

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