参数资料
型号: PT7C4307PE
厂商: PERICOM SEMICONDUCTOR CORP
元件分类: XO, clock
英文描述: 1 TIMER(S), REAL TIME CLOCK, PDIP8
封装: LEAD FREE, MS-001BA, DIP-8
文件页数: 18/20页
文件大小: 517K
代理商: PT7C4307PE
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PT0206(02/05)
Ver: 0
7
Preliminary Data Sheet
PT7C4307
Real-time Clock Module (I
2C Bus)
Control and status register
Addr.
(hex)
Description
D7
D6
D5
D4
D3
D2
D1
D0
Control
OUT
0
SQWE
0
RS1
RS0
07
(default)
0
1
OUT
It controls the output level of the SQW/OUT pin when the square wave output is disabled.
OUT
Data
Description
0
When SQWE = 0, SQW/OUT pin output low.
Default
Read / Write
1
When SQWE = 0, SQW/OUT pin output high.
SQWE (Square Wave Enable)
This bit, when set to a logic 1, will enable the oscillator output. The frequency of the square wave output depends upon the value
of the RS0 and RS1 bits. With the square wave output set to 1Hz, the clock registers update on the falling edge of the square wave.
RS (Rate Select)
These bits control the frequency of the square wave output when the square wave output has been enabled.
RS1, RS0
Data
SQW output freq. (Hz)
00
1
01
4.096k
10
8.192k
Read / Write
11
32.768k
Default
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