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參數(shù)資料
| 型號： | M48T212V-85MH1F |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 時(shí)鐘/數(shù)據(jù)恢復(fù)及定時(shí)提取 |
| 英文描述： | REAL TIME CLOCK, PDSO44 |
| 封裝： | 0.330 INCH, ROHS COMPLIANT, PLASTIC, SOH-44 |
| 文件頁數(shù)： | 17/35頁 |
| 文件大小： | 348K |
| 代理商： | M48T212V-85MH1F |
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Obsolete
Product(s)
- Obsolete
Product(s)
Clock operation
M48T212V
powered-up periodically (at least once every few months) in order for this technique to be
beneficial.
Additionally, if a battery low is indicated, data integrity should be verified upon power-up via
a checksum or other technique.
3.12
Initial power-on defaults
Upon application of power to the device, the following register bits are set to a ’0' state:
WDS, BMB0-BMB4, RB0-RB1, AFE, ABE, W, and FT (see Table 10).
Table 10.
Default values
Figure 10.
Crystal accuracy across temperature
Condition
W
R
FT
AFE
ABE
Watchdog
register(1)
1.
WDS, BMB0-BMB4, RB0, RB1.
Initial power-up
(Battery attach for SNAPHAT)(2)
2.
State of other control bits undefined.
00000
0
RESET (3)
3.
State of other control bits remains unchanged.
00000
0
Power-down (4)
4.
Assuming these bits set to '1' prior to power-down.
01011
0
Subsequent power-up
01000
0
AI00999
–160
0
10203040506070
Frequency (ppm)
Temperature
°C
80
–10
–20
–30
–40
–100
–120
–140
–40
–60
–80
20
0
–20
ΔF
= -0.038
(T - T
0)
2 ± 10%
F
ppm
C
2
T
0 = 25 °C
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| M48T212V-85MH1E | REAL TIME CLOCK, PDSO44 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M48T212V-85MH1TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5V/3.3V TIMEKEEPER[ CONTROLLER |
| M48T212V-85MH6 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5V/3.3V TIMEKEEPER[ CONTROLLER |
| M48T212V-85MH6E | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5V/3.3V TIMEKEEPER CONTROLLER Supervisor |
| M48T212V-85MH6F | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5V/3.3V TIMEKEEPER CONTROLLER Supervisor |
| M48T212V-85MH6TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5V/3.3V TIMEKEEPER[ CONTROLLER |
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