SC9257 查看數據表（PDF） - Silan Microelectronics

零件编号

产品描述 (功能)

生产厂家

SC9257

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

Silan Microelectronics 

Silan

Semiconductors

SC9257

(4) Bits f0~f9…The general-purpose counter results can be read in binary from bits f0~f9 of the output register

(D1H).

Address D1H

LSB

MSB

f0 f1 f2 f3 f4 f5 f6 f7 f8 f9 f10 f11 f12 f13 f14 f15 f16 f17 f18 f19 OVER BUSY "0" "0"

20

219

General-purpose counter data

(5) OVER and BUSY bits…Detect the operating state of the general-purpose counter.

Address D1H

MSB

OVER BUSY "0" "0"

BIT DATA = "1"

General-purpose counter

option monitor bit

General-purpose counter

overflow detection bit

General-purpose counter

busy

Counted value in general-

purpose counterƒ220

(Overflow state)

BIT DATA = "0"

General-purpose counter

ended counting

Counted value in general-

purpose counter‚220 -1

Note: When using the general-purpose counter, before referring to the contents of the general-purpose counter

result bit (f0~f9), confirm that the busy bit is “0” (counting is ended) and the OVER bit is “0” (general-purpose

counter data are normal).

(6) START bit…When the data are set to “1”, the general-purpose counter is reset then counting begins.

LSB

Address D2H

start

MSB

0 Counting continues uninterrupted.

1 Counting begins after general - purpose counter is reset.

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

REV: 1.0

15

2001.10.18

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