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

(2) Output register… Data which ate set in bits C5, C6 and M7~M9 of the input register (D2H) can be read as serial

data C5, C6 and M7~M9 from the output register (D3H).

LSB

Address D2H

C5 C6 M7 M8 M9

MSB

Input register

LSB

Address D3H

C5 C6 M7 M8 M9

MSB

Output register

Data which are input in parallel from pins I/O –5~I/O-9 can be read as serial data I5~I9 from the output register

(D3H)

LSB

Address D3H

MSB

I5 I6 I7 I8 I9

Input register

I/O-5 I/O-6 I/O-7 I/O-8 I/O-9

Input data

INPUT PORTS

(I/O-5 ~ I/O-9)

"L" level

"H" level

BIT DATA

(15-19)

0

1

Note: 1. When pins I/O-5~I/O-9 are used for output, the data in I5~I9 of the output register(D3H) are undefined..

2.When power is turned on, input register (D2H) I/O port control bits C5, C6 and M7~M9 and output data

bits O5~O9 are set to “0”. General-purpose I/O ports are set as input ports. Pins which are used both as

general-purpose I/O ports and for general-purpose counter input are set for I/O port input. The output

state of general-purpose output ports is set to high impedance (N channel open drain output =off).

A typical example of data setting for general-purpose counter and I/O port use is shown below.

LSB

Address D2H

SC IF1 IF2

"0" "1" "1"

M7 M8 M9

"1" "1" "0"

MSB

PIN NAME

Pin function

Pin input/

output state

I/O-7/SCIN

I/O-7

Output port

I/O-8/IFIN1

IFIN1

Input

enable

I/O-9/IFIN2

IFIN2

Input pulled

down

As shown above, the pins can be switched as necessary to enable use as an I/O port or general-purpose counter.

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

REV: 1.0

19

2001.10.18

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