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參數(shù)資料
| 型號(hào)： | DS1689S |
| 英文描述： | 3-Volt/5-Volt Serialized Real-Time Clock with NV RAM Control |
| 中文描述： | 3-Volt/5-Volt序列實(shí)時(shí)時(shí)鐘的非易失RAM控制 |
| 文件頁數(shù)： | 11/32頁 |
| 文件大小： | 321K |
| 代理商： | DS1689S |
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DS1689/DS1693
11 of 32
PERIODIC INTERRUPT RATE AND
SQUARE WAVE OUTPUT FREQUENCY
Table 2
EXT. REG. B
SELECT BITS REGISTER A
E32K
RS3
RS2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
1
0
0
1
0
0
1
0
1
0
0
1
0
0
1
0
0
1
0
0
1
1
0
1
1
0
1
1
0
1
1
1
X
X
*RS3-RS0 determine periodic interrupt rates as listed for E32K=0.
RS1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
X
RS0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
X
t
PI
PERIODIC
INTERRUPT RATE
None
3.90625 ms
7.8125 ms
122.070 s
244.141 s
488.281 s
976.5625 s
1.953125 ms
3.90625 ms
7.8125 ms
15.625 ms
31.25 ms
62.5 ms
125 ms
250 ms
500 ms
*
SQW OUTPUT
FREQUENCY
None
256 Hz
128 Hz
8.192 kHz
4.096 kHz
2.048 kHz
1.024 kHz
512 Hz
256 Hz
128 Hz
64 Hz
32 Hz
16 Hz
8 Hz
4 Hz
2 Hz
32.768 kHz
The third method uses a periodic interrupt to determine if an update cycle is in progress. The UIP bit in
Register A is set high between the setting of the PF bit in Register C (see Figure 3). Periodic interrupts
that occur at a rate of greater than t
BUC
allow valid time and date information to be reached at each
occurrence of the periodic interrupt. The reads should be complete within (t
PI
/ 2+t
BUC
) to ensure that data
is not read during the update cycle.
UPDATE-ENDED AND PERIODIC INTERRUPT RELATIONSHIP
Figure 3
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS1689SN | 3-Volt/5-Volt Serialized Real-Time Clock with NV RAM Control |
| DS1693 | 3-Volt/5-Volt Serialized Real-Time Clock with NV RAM Control |
| DS1699-010 | ELECTRONIC DIGITAL RHEOSTAT |
| DS1699-10 | ELECTRONIC DIGITAL RHEOSTAT |
| DS1699-100 | ELECTRONIC DIGITAL RHEOSTAT |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1689S/R | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:3V/5V Serialized Real-Time Clocks with NV RAM Control |
| DS1689S/T | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:3V/5V Serialized Real-Time Clocks with NV RAM Control |
| DS1689S/T&R | 制造商:Rochester Electronics LLC 功能描述: |
| DS1689S/T&R | 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 |
| DS1689S/T&R/ | 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 |
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