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參數(shù)資料
| 型號： | DS1558W |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 18/18頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC RTC W/NV RAM 3.3V 48-LQFP |
| 標(biāo)準(zhǔn)包裝： | 250 |
| 類型： | 時鐘/日歷 |
| 特點： | 警報器，閏年，監(jiān)視計時器，Y2K |
| 時間格式： | HH:MM:SS（24 小時） |
| 數(shù)據(jù)格式： | YY-MM-DD-dd |
| 接口： | 并聯(lián) |
| 電源電壓： | 2.97 V ~ 3.63 V |
| 電壓 - 電源，電池： | 2.5 V ~ 3.7 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 48-LQFP |
| 供應(yīng)商設(shè)備封裝： | 48-LQFP（7x7） |
| 包裝： | 托盤 |
DS1558
9 of 18
AM1
ALARM RATE
Table 3. ALARM MASK BITS
AM4
AM3
AM2
1
Once per second
1
0
Whe
ec
s ma
n s ond
tch
1
0
minutes and
s match
When
second
1
0
hours, minutes, and seconds match
0
When
0
When date, hours, m
s, and s
s match
0
inute
econd
W
he R C regis
atch alarm
s, AF
a 1. If AE is also set to a 1, the
a
ond
ac i
hen t
T
ter values m
register setting
is set to
larm c
ition
t vates the IRQ /FT pin. The IRQ /FT signal
by a
or write to the flags
register (address 7FFF0h). W
is cleared
read
hen CE
h
is active, t e IRQ /FT si
clear
by having the address
gnal can be
ed
stable for as short as 15ns and either OE or WE active, ut is
teed
e cleared unless tRC is
fulfilled (F
ess has been s
b
not guaran
to b
igure 2). Once the addr
elected for at least 15ns, the IRQ
al can be cleared
i
ate
ut is
eed to be c
til tRC is
re
he alarm flag is also
c
by
ad or
e flags reg
the flag
e
s until the end of the
read/write cycle and the
/FT sign
mmedi
ly, b
not guarant
leared un
fulfilled (Figu
3). T
leared
a re
write to th
ister, but
does not chang state
IRQ
/FT igna as b
cl
ed
s
l h
een ear .
The IRQ /FT pin can also be activated in
ked mode. The
the battery-bac
IRQ
/FT goes low if an alarm
ABE and AE are set. Th
he power-up transition,
ted during power-up se
can be read after system power-up
ine if an alarm was generated d
sequence. Figure 4 illustrates alarm timing
ttery mode and power-up states.
occurs and both
e ABE and AE bits are cleared during t
but an alarm genera
ts AF. Therefore, the AF bit
to determ
uring the power-up
during the backup-ba
Figure 2. CLEARING IRQ WAVEFORMS ACTIVE
Figure 3. CLEARING IRQ WAVEFORMS
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| DS1558W+ | 功能描述:實時時鐘 Watchdog Clock w/NV RAM 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 時間格式:HH:MM:SS RTC 存儲容量: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 |
| DS1558W+TRL | 功能描述:實時時鐘 Watchdog Clock w/NV RAM 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 時間格式:HH:MM:SS RTC 存儲容量: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 |
| DS1558W-TRL | 功能描述:實時時鐘 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 時間格式:HH:MM:SS RTC 存儲容量: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 |
| DS1558Y | 功能描述:實時時鐘 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 時間格式:HH:MM:SS RTC 存儲容量: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 |
| DS1558Y+ | 功能描述:實時時鐘 Watchdog Clock w/NV RAM 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 時間格式:HH:MM:SS RTC 存儲容量: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 |
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