參數(shù)資料
型號(hào)： DS1543
廠商： Maxim Integrated Products, Inc.
英文描述： 64K NV Timekeeping RAM(64K非易失性計(jì)時(shí) RAM)
中文描述： 計(jì)時(shí)64K的非易失存儲(chǔ)器（64K的非易失性計(jì)時(shí)的RAM）
文件頁(yè)數(shù)： 4/19頁(yè)
文件大?。?/td> 165K
代理商： DS1543
DS1543
070198 4/19
with the internal clock oscillator running in the absence
of V
CC
. Each DS1543 is shipped from Dallas Semicon-
ductor with its lithium energy source disconnected,
guaranteeing full energy capacity. When V
CC
is first
applied at a level greater than V
PF
, the lithium energy
source is enabled for battery backup operation. Actual
life expectancy of the DS1543 will be much longer than
10 years since no internal battery energy is consumed
when V
CC
is present. In fact, in most applications, the
life expectancy of the DS1543 will be approximately
equal to the shelf life (expected useful life of the internal
lithium battery with no load attached) of the battery
which may prove to be as long as 20 years.
INTERNAL BATTERY MONITOR
The DS15433 constantly monitors the battery voltage of
the internal batter. The Battery Low Flag (BLF) bit of the
Flags register (B4 of 1FF0h) is not writable and should
always be a “0” when read. If a “1” is ever present, an
exhausted lithium energy source is indicated and both
the contents of the RTC and RAM are questionable.
POWER–ON RESET
A temperature compensated comparator circuit moni-
tors the level of V
CC
. When V
CC
falls to the power fail
trip point, the RST signal (open drain) is pulled low.
When V
CC
returns to nominal levels, the RST signal
continues to be pulled low for a period of 40 ms to
200 ms. The power–on reset function is independent of
the RTC oscillator and thus is operational whether or not
the oscillator is enabled.
CLOCK OPERATIONS
Table 2 and the following paragraphs describe the
operation of RTC, Alarm, and Watchdog functions.
DS1543 REGISTER MAP
Table 2
ADDRESS
DATA
FUNCTION/RANGE
B
7
B
6
B
5
B
4
B
3
B
2
B
1
B
0
1FFFh
10 Year
YEAR
YEAR
00–99
1FFEh
X
X
X
10 M
MONTH
MONTH
01–12
1FFDh
X
X
10 Date
DATE
DATE
01–31
1FFCh
X
FT
X
X
X
DAY
DAY
01–07
1FFBh
X
X
10 HOUR
HOUR
HOUR
00–23
1FFAh
X
10 MINUTES
MINUTES
MINUTES
00–59
1FF9h
OSC
10 SECONDS
SECONDS
SECONDS
00–59
1FF8h
W
R
Y
Y
Y
Y
Y
Y
CONTROL
1FF7h
WDS
BMB4
BMB3
BMB2
BMB1
BMB0
RB1
RB0
WATCHDOG
1FF6h
AE
Y
ABE
Y
Y
Y
Y
Y
INTERRUPTS
1FF5h
AM4
Y
10 DATE
DATE
ALARM DATE
01–31
1FF4h
AM3
Y
10 HOURS
HOURS
ALARM HOURS
00–23
1FF3h
AM2
10 MINUTES
MINUTES
ALARM MINUTES
00–59
1FF2h
AM1
10 SECONDS
SECONDS
ALARM SECONDS
00–59
1FF1h
Y
Y
Y
Y
Y
Y
Y
Y
UNUSED
1FF0h
WF
AF
0
BLF
0
0
0
0
FLAGS
X = Unused, read/writable under Write and Read
bit control
FT = Frequency Test bit
OSC = Oscillator start/stop bit
W = Write bit
R = Read bit
AE = Alarm Flag Enable
Y = Unused, read/writable without Write and Read
bit control
ABE = Alarm in battery Back–up mode enable
AM1–AM4 = Alarm Mask bits
WF = Watchdog Flag
相關(guān)PDF資料
PDF描述
DS1647 Nonvolatile Timekeeping RAM(非易失性計(jì)時(shí)RAM)
DS1647P Nonvolatile Timekeeping RAM(非易失性計(jì)時(shí)RAM)
DS1666 Audio Digital Resistor(音頻數(shù)字電阻器)
DS1666S Audio Digital Resistor(音頻數(shù)字電阻器)
DS1667 Digital Resistor with OP AMP(帶運(yùn)算放大器的數(shù)字電阻器)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS1543-100 功能描述:實(shí)時(shí)時(shí)鐘 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
DS1543-100+ 功能描述:實(shí)時(shí)時(shí)鐘 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
DS1543-70 功能描述:實(shí)時(shí)時(shí)鐘 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
DS1543-85 功能描述:實(shí)時(shí)時(shí)鐘 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
DS1543-85+ 功能描述:實(shí)時(shí)時(shí)鐘 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*