參數(shù)資料
型號(hào)： PT7C4337UE
廠(chǎng)商： Electronic Theatre Controls, Inc.
英文描述： Real-time Clock Module (I2C Bus)
中文描述： 實(shí)時(shí)時(shí)鐘模塊（I2C總線(xiàn)）
文件頁(yè)數(shù)： 7/25頁(yè)
文件大小： 640K
代理商： PT7C4337UE
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Control and status register
Addr.
(hex)
PT0205(02/07)
Ver: 1
7
Data Sheet
PT7C4337
Real-time Clock Module (I
2
C Bus)
Description
D7
D6
D5
D4
D3
D2
D1
D0
Control
(default)
/ETIME
0
0
0
0
0
RS2
1
RS1
1
INTCN
0
A2IE
0
A1IE
0
0E
Status
(default)
OSF
1
0
0
0
0
0
0
0
0
0
0
A2F
A1F
0F
Undefined Undefined
Oscillator related bits
/ETIME
Enable oscillator and time count chain bit.
/ETIME
Data
Description
0
Enable oscillator and time count chain.
Default
Read / Write
1
Disable oscillator and time count chain.
Oscillator Stop Flag.
A logic 1 in this bit indicates that the oscillator either is stopped or was stopped for some period of time and may be used to judge
the validity of the clock and calendar data. This bit is set to logic 1 anytime that the oscillator stops. The following are examples
of conditions that can cause the OSF bit to be set:
1)
The first time power is applied.
2)
The voltage present on VCC is insufficient to support oscillation.
3)
The /ETIME bit is turned off.
4)
External influences on the crystal (e.g., noise, leakage, etc.).
This bit remains at logic 1 until written to logic 0.
Square wave frequency selection bits
RS2, RS1
Square wave Rate Select. These bits control the frequency of the square-wave output when the square wave has been enabled.
OSF
RS2, RS1
Data
SQW output freq. (Hz)
00
1
01
4.096k
10
8.192k
Read / Write
11
32.768k
Default
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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PT7C433833UEX 制造商:Pericom Semiconductor Corporation 功能描述:RESET IC
PT7C433833WE 制造商:Pericom Semiconductor Corporation 功能描述:
PT7C43390WEX 功能描述:IC REAL TIME CLOCK 8SOIC RoHS:是 類(lèi)別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 實(shí)時(shí)時(shí)鐘 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類(lèi)型:時(shí)鐘/日歷 特點(diǎn):警報(bào)器，閏年，監(jiān)控器，監(jiān)視計(jì)時(shí)器 存儲(chǔ)容量:- 時(shí)間格式:HH:MM:SS（12/24 小時(shí)） 數(shù)據(jù)格式:YY-MM-DD-dd 接口:I²C，2 線(xiàn)串口 電源電壓:2.7 V ~ 5.5 V 電壓 - 電源，電池:1.8 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:14-TSSOP 包裝:帶卷 (TR)
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