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參數(shù)資料
| 型號(hào)： | LV8572AN |
| 廠(chǎng)商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類(lèi)： | XO, clock |
| 英文描述： | LV8572A Low Voltage Real Time Clock (RTC) |
| 中文描述： | 0 TIMER(S), REAL TIME CLOCK, PDIP24 |
| 封裝： | PLASTIC, DIP-24 |
| 文件頁(yè)數(shù)： | 6/20頁(yè) |
| 文件大小： | 329K |
| 代理商： | LV8572AN |
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Functional Description
The LV8572A contains a fast access real time clock, inter-
rupt control logic, power fail detect logic, and CMOS RAM.
All functions of the RTC are controlled by a set of seven
registers. A simplified block diagram that shows the major
functional blocks is given in Figure 1.
The blocks are described in the following sections:
1. Real Time Clock
2. Oscillator Prescaler
3. Interrupt Logic
4. Power Failure Logic
5. Additional Supply Management
The memory map of the RTC is shown in the memory ad-
dressing table. The memory map consists of two 31 byte
pages with a main status register that is common to both
pages. A control bit in the Main Status Register is used to
select either page. Figure 2 shows the basic concept.
Page 0 contains all the clock timer functions, while page 1
has scratch pad RAM. The control registers are split into
two separate blocks to allow page 1 to be used entirely as
scratch pad RAM. Again a control bit in the Main Status
Register is used to select either control register block.
TL/F/11417–7
FIGURE 2. LV8572A Internal Memory Map
6
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LV8573A | LV8573A Low Voltage Real Time Clock (RTC) |
| LV8573AM | LV8573A Low Voltage Real Time Clock (RTC) |
| LV8573AN | LV8573A Low Voltage Real Time Clock (RTC) |
| LV8573AV | LV8573A Low Voltage Real Time Clock (RTC) |
| LV8573M | LV8573A Low Voltage Real Time Clock (RTC) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LV8572AVX | 制造商:未知廠(chǎng)家 制造商全稱(chēng):未知廠(chǎng)家 功能描述:Real-Time Clock |
| LV8573A | 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:LV8573A Low Voltage Real Time Clock (RTC) |
| LV8573AM | 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:LV8573A Low Voltage Real Time Clock (RTC) |
| LV8573AN | 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:LV8573A Low Voltage Real Time Clock (RTC) |
| LV8573AV | 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:LV8573A Low Voltage Real Time Clock (RTC) |
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