- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄9324 > DS1553-70 (Maxim Integrated Products)IC RTC RAM Y2K 5V 70NS 28-EDIP PDF資料下載
參數(shù)資料
| 型號： | DS1553-70 |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 2/20頁 |
| 文件大小： | 0K |
| 描述： | IC RTC RAM Y2K 5V 70NS 28-EDIP |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 12 |
| 類型： | 時鐘/日歷 |
| 特點(diǎn)： | 警報器，閏年，NVSRAM，監(jiān)視計時器，Y2K |
| 存儲容量： | 8KB |
| 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： | 4.5 V ~ 5.5 V |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 通孔 |
| 封裝/外殼： | 28-DIP 模塊（0.600"，15.24mm） |
| 供應(yīng)商設(shè)備封裝： | 28-EDIP |
| 包裝： | 管件 |
DS1553 64kB, Nonvolatile, Year-2000-Compliant Timekeeping RAM
10 of 20
USING THE WATCHDOG TIMER
The watchdog timer can be used to detect an out-of-control processor. The user programs the watchdog
timer by setting the desired amount of timeout into the 8-bit Watchdog register (Address 1FF7h). The five
Watchdog register bits BMB4–BMB0 store a binary multiplier and the two lower-order bits
RB1–RB0 select the resolution, where 00 = 1/16 second, 01 = 1/4 second, 10 = 1 second, and
11 = 4 seconds. The watchdog timeout value is then determined by the multiplication of the 5-bit
multiplier value with the 2-bit resolution value. (For example: writing 00001110 in the Watchdog register
= 3 x 1 second or 3 seconds.) If the processor does not reset the timer within the specified period, the
Watchdog Flag (WF) is set and a processor interrupt is generated and stays active until either the
Watchdog Flag (WF) is read or the Watchdog register (1FF7) is read or written.
The most significant bit of the Watchdog register is the Watchdog Steering Bit (WDS). When set to 0, the
watchdog activates the IRQ /FT output when the watchdog times out.
When WDS is set to 1, the watchdog outputs a negative pulse on the RST output for 40ms to 200ms. The
Watchdog register (1FF7) and the FT bit are reset to 0 at the end of a watchdog timeout when the WDS
bit is set to 1.
The watchdog timer resets when the processor performs a read or write of the Watchdog register. The
timeout period then starts over. Writing a value of 00h to the Watchdog register disables the watchdog
timer. The watchdog function is automatically disabled upon power-up and the Watchdog register is
cleared. If the watchdog function is set to output to the IRQ /FT output and the frequency test function is
activated, the watchdog function prevails and the frequency test function is denied.
POWER-ON DEFAULT STATES
Upon application of power to the device, the following register bits are set to 0:
WDS = 0, BMB0–BMB4 = 0, RB0–RB1 = 0, AE = 0, and ABE = 0.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MCP4331T-103E/ST | IC DGTL POT QUAD 10K 20TSSOP |
| MS27505E21F35PC | CONN RCPT 79POS BOX MNT W/PINS |
| MCP41050T-I/SN | IC POT DIGITAL 50K 1CH SPI 8SOIC |
| DS1743P-70 | IC RTC RAM Y2K 5V 70NS 34-PCM |
| VE-BNT-IU-F4 | CONVERTER MOD DC/DC 6.5V 200W |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1553-70+ | 功能描述:實(shí)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 |
| DS1553-85+ | 功能描述:實(shí)時時鐘 64kB NV RAM Timekeeper 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 |
| DS1553P | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:64kB, Nonvolatile, Year-2000-Compliant Timekeeping RAM |
| DS1553P/YP/WP | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:PowerCap with Crystal |
| DS1553P-100 | 功能描述:實(shí)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 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。