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參數(shù)資料
| 型號： | DS9034PCX |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | Timer or RTC |
| 英文描述： | 0 TIMER(S), REAL TIME CLOCK, DMA34 |
| 封裝： | POWERCAP MODULE-34 |
| 文件頁數(shù)： | 12/16頁 |
| 文件大?。?/td> | 190K |
| 代理商： | DS9034PCX |
DS1743/DS1743P Y2K-Compliant, Nonvolatile Timekeeping RAMs
5 of 16
Figure 1. Block Diagram
Table 1. Truth Table
VCC
CE
CE2
OE
WE
MODE
DQ
POWER
VIH
X
Deselect
High-Z
Standby
X
VIL
X
Deselect
High-Z
Standby
VIL
VIH
X
VIL
Write
Data In
Active
VIL
VIH
VIL
VIH
Read
Data Out
Active
VCC > VPF
VIL
VIH
Read
High-Z
Active
VSO < VCC < VPF
X
Deselect
High-Z
CMOS Standby
VCC<VSO<VPF
X
Deselect
High-Z
Data-Retention
Mode
SETTING THE CLOCK
As shown in Table 2, bit 7 of the century register is the write bit. Setting the write bit to a 1, like the read
bit, halts updates to the DS1743 registers. The user can then load them with the correct day, date and time
data in 24-hour BCD format. Resetting the write bit to a 0 then transfers those values to the actual clock
counters and allows normal operation to resume.
STOPPING AND STARTING THE CLOCK OSCILLATOR
The clock oscillator may be stopped at any time. To increase the shelf life, the oscillator can be turned off
to minimize current drain from the battery. The
OSC bit is the MSB (bit 7) of the seconds registers, see
Table 2. Setting it to a 1 stops the oscillator.
FREQUENCY TEST BIT
As shown in Table 2, bit 6 of the day byte is the frequency test bit. When the frequency test bit is set to
logic 1 and the oscillator is running, the LSB of the seconds register will toggle at 512Hz. When the
seconds register is being read, the DQ0 line will toggle at the 512Hz frequency as long as conditions for
access remain valid (i.e.,
CE low, OE low, WE high, and address for seconds register remain valid and
stable).
Dallas
Semiconductor
DS1743
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PDF描述 |
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| DS1743-100 | 0 TIMER(S), REAL TIME CLOCK, DMA28 |
| DS1743WP-120 | 0 TIMER(S), REAL TIME CLOCK, DMA34 |
| DS1743WP-150 | 0 TIMER(S), REAL TIME CLOCK, DMA34 |
| DS1743W-150 | 0 TIMER(S), REAL TIME CLOCK, DMA28 |
| DS1743P-100 | 0 TIMER(S), REAL TIME CLOCK, DMA34 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| DS9034PCX+ | 功能描述:電池管理 Powercap w/Crystal RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| DS906V031ATMTC | 制造商:Texas Instruments 功能描述: |
| DS9072 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:SIP Stik Connectors |
| DS9072-40V | 功能描述:SIMM 連接器 SIP Stik Connector RoHS:否 制造商:TE Connectivity / AMP 系列: 節(jié)距:1.27 mm 位置/觸點數(shù)量:72 安裝風格:Through Hole 安裝角:22 deg |
| DS9072-40V/NO-BRAND | 制造商:Maxim Integrated Products 功能描述:SIPSTIK, CONN. 40 POS VERTICAL - Rail/Tube |
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