資料介紹
The CDP1879 and CDP1879C1 Real-Time Clocks [1] are 24
pin devices, each consisting essentially of a long string of
counters that supply standard clock time and date information
in BCD format, Figure 1. In addition, the CDP1879
features an alarm circuit that activates the interrupt output
pin and a separate clock output pin that provides a programmable
square-wave output signal. Both the internal-alarm
and clock-out signals can trigger the interrupt output pin, so
that a status register is available to indicate the interrupt
source. Users can supply a signal to the power-down pin
that allows the interrupt-output pin level to control external
power-down and wake-up circuits. Software generally
required by other real-time clocks to prevent clock rollover is
eliminated by a transparent “freeze” circuit that assures data
integrity when accessing the clock. The clock’s counters,
plus a control register that regulates operation, are
individually selectable using three address lines. Internal
control signals governing read and write operations are
selected through the IO/MEM pin, which places the device in
a memory-mapped or I/O-mapped mode of operation.
pin devices, each consisting essentially of a long string of
counters that supply standard clock time and date information
in BCD format, Figure 1. In addition, the CDP1879
features an alarm circuit that activates the interrupt output
pin and a separate clock output pin that provides a programmable
square-wave output signal. Both the internal-alarm
and clock-out signals can trigger the interrupt output pin, so
that a status register is available to indicate the interrupt
source. Users can supply a signal to the power-down pin
that allows the interrupt-output pin level to control external
power-down and wake-up circuits. Software generally
required by other real-time clocks to prevent clock rollover is
eliminated by a transparent “freeze” circuit that assures data
integrity when accessing the clock. The clock’s counters,
plus a control register that regulates operation, are
individually selectable using three address lines. Internal
control signals governing read and write operations are
selected through the IO/MEM pin, which places the device in
a memory-mapped or I/O-mapped mode of operation.
下載該資料的人也在下載
下載該資料的人還在閱讀
更多 >
- 實(shí)時時鐘 USB 評估板用戶指南
- SPTECH硅NPN功率晶體管2SD1879規(guī)格書 12次下載
- AN1879 實(shí)時時鐘參考設(shè)計(jì)
- 實(shí)時時鐘(RTC)晶振設(shè)計(jì)指南
- 實(shí)時時鐘CDP68HC68T1的應(yīng)用及千年蟲問題
- CDP1821C/CDP18213 pdf datashee
- CDP1823C/CDP18233 pdf datashee
- CDP1854A/3,CDP1854AC/3 pdf dat
- CDP1883,CDP1883C pdf datasheet
- CDP1802A, CDP1802AC,CDP1802BC
- CDP1872C,CDP1874C, CDP1875C pd
- CDP1823,CDP1823C pdf datasheet
- CDP1854A,CDP1854AC pdf datashe
- CDP1857C pdf datasheet(4-Bit B
- CDP1853,CDP1853C pdf datasheet
- TCXO RTC實(shí)時時鐘模塊的特性 133次閱讀
- RTC實(shí)時時鐘的基本概念和工作原理 2630次閱讀
- 利用精確的I2C實(shí)時時鐘實(shí)現(xiàn)完美設(shè)計(jì) 798次閱讀
- 業(yè)界轉(zhuǎn)向MEMS以獲得精確的實(shí)時時鐘 1191次閱讀
- 使用實(shí)時時鐘IC DS1307制作精確時鐘的方法 6182次閱讀
- DS1302與ATMEGA48設(shè)計(jì)的實(shí)時時鐘 4765次閱讀
- 實(shí)時時鐘的硬件結(jié)構(gòu)_實(shí)時時鐘故障怎么解決 6898次閱讀
- dfrobotI2C DS1307 RTC實(shí)時時鐘模塊介紹 4901次閱讀
- digilent實(shí)時時鐘日歷模塊簡介 1350次閱讀
- 實(shí)時時鐘的單片機(jī)項(xiàng)目需要學(xué)習(xí)什么知識 3435次閱讀
- 一文看懂rtc實(shí)時時鐘和單片機(jī)時鐘的區(qū)別 6w次閱讀
- 關(guān)于實(shí)時時鐘模塊DS1302的介紹 1.8w次閱讀
- 實(shí)時時鐘芯片有哪些_實(shí)時時鐘芯片選型介紹 3.9w次閱讀
- 基于MicroBlaze的AXI總線實(shí)時時鐘IP核設(shè)計(jì) 3835次閱讀
- 實(shí)時時鐘芯片應(yīng)用設(shè)計(jì)時必須要考慮的事項(xiàng) 5389次閱讀
下載排行
本周
- 1電子電路原理第七版PDF電子教材免費(fèi)下載
- 0.00 MB | 1491次下載 | 免費(fèi)
- 2單片機(jī)典型實(shí)例介紹
- 18.19 MB | 95次下載 | 1 積分
- 3S7-200PLC編程實(shí)例詳細(xì)資料
- 1.17 MB | 27次下載 | 1 積分
- 4筆記本電腦主板的元件識別和講解說明
- 4.28 MB | 18次下載 | 4 積分
- 5開關(guān)電源原理及各功能電路詳解
- 0.38 MB | 11次下載 | 免費(fèi)
- 6100W短波放大電路圖
- 0.05 MB | 4次下載 | 3 積分
- 7基于單片機(jī)和 SG3525的程控開關(guān)電源設(shè)計(jì)
- 0.23 MB | 4次下載 | 免費(fèi)
- 8基于AT89C2051/4051單片機(jī)編程器的實(shí)驗(yàn)
- 0.11 MB | 4次下載 | 免費(fèi)
本月
- 1OrCAD10.5下載OrCAD10.5中文版軟件
- 0.00 MB | 234313次下載 | 免費(fèi)
- 2PADS 9.0 2009最新版 -下載
- 0.00 MB | 66304次下載 | 免費(fèi)
- 3protel99下載protel99軟件下載(中文版)
- 0.00 MB | 51209次下載 | 免費(fèi)
- 4LabView 8.0 專業(yè)版下載 (3CD完整版)
- 0.00 MB | 51043次下載 | 免費(fèi)
- 5555集成電路應(yīng)用800例(新編版)
- 0.00 MB | 33562次下載 | 免費(fèi)
- 6接口電路圖大全
- 未知 | 30320次下載 | 免費(fèi)
- 7Multisim 10下載Multisim 10 中文版
- 0.00 MB | 28588次下載 | 免費(fèi)
- 8開關(guān)電源設(shè)計(jì)實(shí)例指南
- 未知 | 21539次下載 | 免費(fèi)
總榜
- 1matlab軟件下載入口
- 未知 | 935053次下載 | 免費(fèi)
- 2protel99se軟件下載(可英文版轉(zhuǎn)中文版)
- 78.1 MB | 537793次下載 | 免費(fèi)
- 3MATLAB 7.1 下載 (含軟件介紹)
- 未知 | 420026次下載 | 免費(fèi)
- 4OrCAD10.5下載OrCAD10.5中文版軟件
- 0.00 MB | 234313次下載 | 免費(fèi)
- 5Altium DXP2002下載入口
- 未知 | 233046次下載 | 免費(fèi)
- 6電路仿真軟件multisim 10.0免費(fèi)下載
- 340992 | 191183次下載 | 免費(fèi)
- 7十天學(xué)會AVR單片機(jī)與C語言視頻教程 下載
- 158M | 183277次下載 | 免費(fèi)
- 8proe5.0野火版下載(中文版免費(fèi)下載)
- 未知 | 138039次下載 | 免費(fèi)
評論
查看更多