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參數(shù)資料
| 型號： | PTPS65910A1RSL |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | POWER SUPPLY SUPPORT CKT, PQCC48 |
| 封裝： | 6 X 6 MM, 1 MM HEIGHT, GREEN, PLASTIC,VQFN-48 |
| 文件頁數(shù)： | 42/89頁 |
| 文件大小： | 941K |
| 代理商： | PTPS65910A1RSL |
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PRODUCTPREVIEW
3
6
4
59
0
1
58
2
Seconds
59
0
1
58
2
Hours
3
4
Hours
59
0
1
Seconds
Compensation event
swcs046-015
www.ti.com
SWCS046C – MARCH 2010 – REVISED JUNE 2010
Register
Value
SECONDS_REG
0x36
MINUTES_REG
0x54
HOURS_REG
0x90
DAYS_REG
0x05
MONTHS_REG
0x09
YEARS_REG
0x08
The user can round to the closest minute, by setting the ROUND_30S register bit. TC values are set to the
closest minute value at the next second. The ROUND_30S bit is automatically cleared when the rounding time is
performed.
Example:
If current time is 10H59M45S, a round operation changes time to 11H00M00S.
if current time is 10H59M29S, a round operation changes time to 10H59M00S.
GENERAL REGISTERS
Software can access the RTC_STATUS_REG and RTC_CTRL_REG registers at any time (except for the
RTC_CTRL_REG[5] bit, which must be changed only when the RTC is stopped).
COMPENSATION REGISTERS
The RTC_COMP_MSB_REG and RTC_COMP_LSB_REG registers must respect the available access period.
These registers must be updated before each compensation process. For example, software can load the
compensation value into these registers after each hour event, during an available access period.
Figure 15. RTC Compensation Scheduling
This drift can be balanced to compensate for any inaccuracy of the 32-kHz oscillator. Software must calibrate the
oscillator frequency, calculate the drift compensation versus one time hour period; and then load the
Copyright 2010, Texas Instruments Incorporated
47
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