參數(shù)資料
型號: M48ST59W-100MH1
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: 0 TIMER(S), REAL TIME CLOCK, PDSO44
封裝: 0.330 INCH, SNAPHAT, PLASTIC, SOH-44
文件頁數(shù): 23/29頁
文件大?。?/td> 158K
代理商: M48ST59W-100MH1
3/29
M48ST59W
CLOCK OPERATIONS . . . .... ... . . . . . . . . ... .. . . ... . . . .... . . . .... .... .. . . . . . . . . .... . 15
Reading the Clock . . . . . . . . . . . . . . . . . . . . . . ... . . . . ... .. ... .. .. ... .. . ... .. . . ... . . . . . 15
Setting the Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . .... ... . ... . . .. .. .. .. . . . . . . ... . .... 15
Stopping and Starting the Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Register Map (Table 11.). . . . . . . . . . . . . . . . . . . . . .... . . . . .. . . . . . . . . . . . . . ... .. . . . . .... 16
Calibrating the Clock . . . . . . .... . . .. .. .. .. . . . . . . . . . . . . . ... . . . . . . . . . ... .. .. ... .. . ..17
Setting Alarm Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .... .... ... . . . . . . . . ... .. . . ... . 17
Programmable Interrupts. . . . . . . . . . . .... . . ... .. .... ... . . . . . . . . . . . . . . . . . .. . ... .. ... 18
Alarm Repeat Mode (Table 12.) . . . . . . . . . . . . . . .... . ... .. . . . . .... . . . . .. . . . . . . . . .... . 18
Back-up Mode Alarm Waveform (Figure 10.) . . . . . . . . . . . . . . . . . . . . . . . . . . . .... . . ... .. ... 18
Interrupt Reset Waveforms (Figure 11.) . . . . . . . . . . . ... . . . . ... .. ... .. .. . . . . . . . ... .. .. . 19
Watchdog Timer . .... . . . .... .... .. . .... .. . .... . ... .. .. .. .... . . . ... . . . . . . . . . . . . . 19
Power-on Reset. . . . . . . . . . . . . . . . . . . . . .... . ... .. .. .. . . . . . . . . . . . . ... . . . .... . ... .. .19
Battery Low Flag . . . . . . . . .... .... .. . . . . . . . . .... . ... .. .. .. . .... ... . . . ... .. .. .. .. . 19
Century Bit . . . . . . . . . . . . . . .... . . .. .. .. .. . . . . . . . . . . .. . ... . . . . ... .. ... .. .. ... .. . ..20
Initial Power-On Defaults. . . . . . . . . . . . . . . . . ... . . . . . . . . . ... .. .. ... .. . ... .. . . ... .. ... 20
Default Values (Table 14.). . . . . . .... . ... ... . . . .... .... .. . . . . . . . . . . . . . ... .. . . . . .... 20
TREC Bit . . . . . . . .... . . . . ... . ... .. . . ... .. . .... . ... .. . . . . .... . . . ... . . . . . . . . .... . 20
tREC Definitions POWER-ON (Table 13.). . . . ... .. ... .. .. . . . . . . . ... .. .. .... . . ... .. ... 20
Power-Fail Comparator . .... .. . .... . ... .. . . ... ... . ... .. . . ... .. . . ... . ... .. .. ... ... 21
Adding Hysteresis (Figure 12.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .... 21
Hysteresis on Rising VIN (Figure 13.) . . . . . . . . . . . . . . . . . .... . . . .... . ... .. . . ... .. . .... . 22
Power Supply Decoupling and Undershoot Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Supply Voltage Protection (Figure 14.) . . . . . . ... . . . . . . . . . ... .. .. ... .. .. . . .. . . ... .. ... 22
Crystal Accuracy Across Temperature (Figure 15.) .... .... .. . . . . . . . . . . . . . ... .. . . . . .... 23
Clock Calibration (Figure 16.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .... . ... .. .23
PART NUMBERING . . . . . . . . . .... . . .. .. .. .. . . . . . . . . . . . . . ... . . . . . . . . . ... .. .. ... .. . ..24
PACKAGE MECHANICAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .... . ... ... 25
REVISION HISTORY. . . . . . . . . . . . . . . . . . . . . . . . . . . .... . . . ... . . . . . . . . . . . . . ... ... . . . .... 28
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