- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄9408 > DS1391U-18+ (Maxim Integrated Products)IC RTC W/CHARGER 10-USOP PDF資料下載
參數(shù)資料
| 型號： | DS1391U-18+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 6/26頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC RTC W/CHARGER 10-USOP |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 50 |
| 類型： | 時鐘/日歷 |
| 特點(diǎn)： | 警報器，閏年，方波輸出，涓流充電器 |
| 時間格式： | HH:MM:SS:hh（12/24 小時） |
| 數(shù)據(jù)格式： | YY-MM-DD-dd |
| 接口： | SPI |
| 電源電壓： | 1.71 V ~ 1.89 V |
| 電壓 - 電源，電池： | 1.3 V ~ 3.7 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 10-TFSOP，10-MSOP（0.118"，3.00mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 10-µMAX |
| 包裝： | 管件 |
| 產(chǎn)品目錄頁面： | 1434 (CN2011-ZH PDF) |
第1頁第2頁第3頁第4頁第5頁當(dāng)前第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁
DS1390–DS1394
Low-Voltage SPI/3-Wire RTCs with
Trickle Charger
14
Maxim Integrated
Address Map
Table 3 shows the address map for the DS1390–
DS1393 RTC and RAM registers. The RTC registers are
located in address locations 00h to 0Fh in read mode,
and 80h to 8Fh in write mode. During a multibyte
access, when the address pointer reaches 0Fh, it
wraps around to location 00h. On the falling edge of the
CS pin (DS1390/DS1391/DS1394) or the rising edge of
CE (DS1392/DS1393), the current time is transferred to
a second set of registers. The time information is read
from these secondary registers, while the clock may
continue to run. This eliminates the need to re-read the
registers if the main registers update during a read. To
avoid rollover issues when writing to the time and date
registers, all registers should be written before the hun-
dredths-of-seconds registers reaches 99 (BCD).
When reading from the hundredths of seconds register,
there is a possibility that the data transfer happens at the
same time as an increment of the register. If this occurs,
the data in the buffer may be incorrect. The chances of
this happening is approximately 170ppb. There are two
ways to deal with this.
The first method is to synchronize enabling the device
(CE or CS) with the square wave or interrupt output
(DS1390–DS1394). Enabling the device, either after
detecting the falling edge of the interrupt output or the
rising edge of the square-wave output, ensures that the
two events are not simultaneous.
The second method is to read the hundredths of sec-
onds register until the data for two consecutive reads
match. With this method, the master must be able to
read the register at least twice within the 10ms update
period of the hundredths of seconds register.
Either of the described methods ensures that the data in
all the registers is correct. If the hundredths of seconds
register is not used, it is also possible for the same prob-
lem to occur when reading the seconds register. The
probability of an error is inversely proportional to the rate
of the register's update frequency in relation to the hun-
dredth of seconds register, so the error rate for the sec-
onds register would be approximately 1.7ppb. The same
methods used for the hundredth of seconds register
would be used for the seconds register.
WRITE
ADDRESS
READ
ADDRESS
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
FUNCTION
RANGE
80h
00h
Tenths of Seconds
Hundredths of Seconds
Hundredths
of Seconds
0–99 BCD
81h
01h
0
10 Seconds
Seconds
00–59 BCD
82h
02h
0
10 Minutes
Minutes
00–59 BCD
AM/PM
83h
03h
0
12/
24
10 Hour
10
Hour
Hours
1–12 +AM/PM
00–23 BCD
84h
04h
0
Day
1–7 BCD
85h
05h
0
10 Date
Date
01–31 BCD
86h
06h
Century
0
10
Month
Month/
Century
01–12 +
Century BCD
87h
07h
10 Year
Year
00–99 BCD
88h
08h
Tenths of Seconds
Hundredths of Seconds
Alarm
Hundredths
of Seconds
0–99 BCD
89h
09h
AM1
10 Seconds
Seconds
Alarm
00–59 BCD
8Ah
0Ah
AM2
10 Minutes
Minutes
Alarm
00–59 BCD
Table 3. Address Map
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| VI-22T-MY-F3 | CONVERTER MOD DC/DC 6.5V 50W |
| DS1390U-18+ | IC RTC W/CHARGER 10-USOP |
| MS3456L20-19PX | CONN PLUG 3POS STRAIGHT W/PINS |
| DS1392U-33+ | IC RTC W/CHARGER 10-USOP |
| VI-22T-MY-F2 | CONVERTER MOD DC/DC 6.5V 50W |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1391U-18+ | 功能描述:實(shí)時時鐘 Low-V SPI/3-Wire With Trickle Charger 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 |
| DS1391U-3 | 功能描述:實(shí)時時鐘 Low-V SPI/3-Wire With Trickle Charger 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 |
| DS1391U-3+ | 功能描述:實(shí)時時鐘 Low-V SPI/3-Wire With Trickle Charger 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 |
| DS1391U-3+T&R | 制造商:Maxim Integrated Products 功能描述:REAL TIME CLOCK SERL 10USOP - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC RTC W/CHARGER 10-USOP 制造商:Maxim Integrated Products 功能描述:Real Time Clock Low-V SPI/3-Wire With Trickle Charger |
| DS1391U-3+T&R | 功能描述:實(shí)時時鐘 Low-V SPI/3-Wire With Trickle Charger 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 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。