Silan

Semiconductors

SC3610

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 1.0

2000.12.31

6

FUNCTIONAL DESCRIPTION

1. RADIO FREQUENCY DISPLAY OPERATION (DTS MODE):

The FM and AM local oscillator output generated from the external RF receiver enters a high gain input

dynamic pre-scalar. Depending on the state of the AM/FM-SEL pin, the FM and AM signal will be selected and

enters the IF frequency offset block. Depending on the FM/AM selection, 10.7MHz/70kHz or 455kHz I.F.

frequency will be subtracted or added from the input signal.

LCD Display Range:

Mode

Range

Display range (on LCD)

Step

Resolution

FM

H

L

11.00 MHz to 99.99 MHz

11.00 MHz to 149.9 kHz

10kHz

100kHz

1kHz

10kHz

AM

H

L

500 kHz to 9999 kHz

0.5 MHz to 29.99 MHz

1kHz

10kHz

100kHz

1kHz

Note:1 When counter frequency overflow, MSB will not be displayed.

IF Offset for different application:

IF70K

AMFM-

SEL

IF Offset

Operation

0

0

+10.7MHz

Display FM input frequency 10.7MHz

0

1

+455kHz

Display AM input frequency 455kHz

1

0

-70 kHz*

Display FM input frequency +70kHz

1

1

+455 kHz

Display AM input frequency 455kHz

* Suitable to use with Silan SC1088

2. CLOCK FUNCTION:

1) The clock will be advanced in the following flow:

PM 12:00

→ PM 11:59 → AM 12:00 → 11:59

2) The [:] sign is the second indicator and will blink at a rate of 2Hz

3) TIME SETTING:

--

Pressing the keys combination of [TIME SET] [HR SET] or [TIME SET] [MIN SET] will enter the time

setting mode.

--

One digit will be incremented after entering the alarm setting mode. Keep pressing the keys

combination for more than 0.5 seconds will make the digit to be advanced at a rate of 2Hz.

4) ALARM TIME SETTING:

--

Pressing the keys combination of [AL DISP] [HR SET] or [AL DISP] [MIN SET] will enter the alarm time

setting mode. The [AL] indicator will turn on and the [:] sign will stop blinking.

--

One digit will be incremented after entering the alarm setting mode. Keep pressing the keys combination