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參數(shù)資料
| 型號(hào)： | R2033K |
| 廠商： | Ricoh Co., Ltd. |
| 英文描述： | 3 wire interface Real-Time Clock ICs |
| 中文描述： | 3線接口實(shí)時(shí)時(shí)鐘芯片 |
| 文件頁數(shù)： | 33/50頁 |
| 文件大小： | 542K |
| 代理商： | R2033K |
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R2033K/T
(3) When Oscillation Frequency Is Lower Than Target Frequency (Causing Time Count Loss)
When DEV=0:
Oscillation adjustment value = (Oscillation frequency - Target Frequency)
Oscillation frequency
×
3.051
×
10
-6
≈
(Oscillation Frequency – Target Frequency)
×
10
When DEV=1:
Oscillation adjustment value = (Oscillation frequency - Target Frequency)
Oscillation frequency
×
1.017
×
10
-6
≈
(Oscillation Frequency – Target Frequency)
×
30
Oscillation adjustment value calculations are exemplified below
(A) For an oscillation frequency = 32768.85Hz and a target frequency = 32768.05Hz
When setting DEV bit to 0:
Oscillation adjustment value = (32768.85 - 32768.05 + 0.1) / (32768.85
×
3.051
×
10
-6
)
≈
(32768.85 - 32768.05)
×
10 + 1
= 9.001
≈
9
In this instance, write the settings (DEV,F6,F5,F4,F3,F2,F1,F0)=(0,0,0,0,1,0,0,1) in the oscillation adjustment
register. Thus, an appropriate oscillation adjustment value in the presence of any time count gain represents a
distance from 01h.
When setting DEV bit to 1:
Oscillation adjustment value = (32768.85 - 32768.05 + 0.0333) / (32768.85
×
1.017
×
10
-6
)
≈
(32768.85 - 32768.05)
×
30 + 1
= 25.00
≈
25
In this instance, write the settings (DEV,F6,F5,F4,F3,F2,F1,F0)=(1,0,0,1,1,0,0,1) in the oscillation adjustment
register.
(B) For an oscillation frequency = 32762.22Hz and a target frequency = 32768.05Hz
When setting DEV bit to 0:
Oscillation adjustment value = (32762.22 - 32768.05) / (32762.22
×
3.051
×
10
-6
)
≈
(32762.22 - 32768.05)
×
10
= -58.325
≈
-58
To represent an oscillation adjustment value of - 58 in 7-bit coded decimal notation, subtract 58 (3Ah) from 128
(80h) to obtain 46h. In this instance, write the settings of (DEV,F6,F5,F4,F3,F2,F1,F0) = (0,1,0,0,0,1,1,0) in the
oscillation adjustment register. Thus, an appropriate oscillation adjustment value in the presence of any time
count loss represents a distance from 80h.
When setting DEV bit to 1:
Oscillation adjustment value = (32762.22 - 32768.05) / (32762.22
×
1.017
×
10
-6
)
≈
(32762.22 - 32768.05)
×
30
= -174.97
≈
-175
Oscillation adjustment value can be set from -62 to 63. Then, in this case, Oscillation adjustment value is out of
range.
33
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| R2033K-E2 | 3 wire interface Real-Time Clock ICs |
| R2033T | 3 wire interface Real-Time Clock ICs |
| R2043T | 4-wire Serial Interface |
| R2043T-E2 | 4-wire Serial Interface |
| R2043K | 4-wire Serial Interface |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| R2033K-E2 | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:3 wire interface Real-Time Clock ICs |
| R2033T | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:3 wire interface Real-Time Clock ICs |
| R2033T-E2 | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:3 wire interface Real-Time Clock ICs |
| R203426000 | 功能描述:RF 連接器 SSMB(M) STR NA PCB RoHS:否 制造商:Bomar Interconnect 產(chǎn)品:Connectors 射頻系列:BNC 型式:Jack (Female) 極性: 觸點(diǎn)電鍍:Gold 阻抗: 端接類型:Solder 主體類型:Straight Bulkhead 電纜類型: |
| R203426000W | 功能描述:RF 連接器 EMB DR CI RoHS:否 制造商:Bomar Interconnect 產(chǎn)品:Connectors 射頻系列:BNC 型式:Jack (Female) 極性: 觸點(diǎn)電鍍:Gold 阻抗: 端接類型:Solder 主體類型:Straight Bulkhead 電纜類型: |
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