SC9257 데이터 시트보기 (PDF) - Silan Microelectronics

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SC9257

0.3-6.0V PLL for digital tuning systems (DTS)

Silan Microelectronics 

Silan

Semiconductors

LSB

Address D2H G0 G1

SC9257

MSB

G0 G1 GATE TIME

00

10

01

11

1ms

4ms

16ms

64ms

CYCLE MEASUREMENT

PULSE

50 KHz

150 KHz

900 KHz

Crystal oscillator frequency

(2) Bits SC,IF1 and IF2 …I/O port and general-purpose counter switching bits.

(*) The functions of the following pins are switched by data.

LSB

Address D2H

sc IF1 IF2

MSB

SC I/O-7/SCIN

1

SCIN

0

I/O-7

IF1

I/O-8/IFIN1

1

SCIN

0

I/O-8

IF2 I/O-9/IFIN2

1

IFIN2

0

I/O-9

(3) Bits M7, M8 and M9 … M7 sets the state for pin I/O-7/SCIN, M8 sets the state for pin I/O-8/IFIN1; M9, for

pin I/O-9/IFIN2.

These operations are valid when bits SC, IF1 and IF2 are all set to 1.

LSB

Address D2H

M7 M8 M9

MSB

M7 M8 M9

0

0

0

(*)

(*)

1

(*)

1

0

1

0

0

PIN STATES (When bits sc, IF1 and IF2 are all set to "1")

SCIN

INPUT disabled

IFIN1

INPUT pulled down

IFIN2

INPUT pulled down

INPUT enabled

INPUT enabled

INPUT enabled

INPUT pulled down

INPUT pulled down

Note: Bits marked with an asterisk “(*)” are don’t care

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

REV: 1.0

14

2001.10.18

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