參數(shù)資料
型號(hào)： M41ST84W-70MQ6
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： 1 TIMER(S), REAL TIME CLOCK, PDSO16
封裝： PLASTIC, SOIC-16
文件頁(yè)數(shù)： 12/32頁(yè)
文件大?。?/td> 168K
代理商： M41ST84W-70MQ6
M41ST84Y, M41ST84W
2/32
TABLE OF CONTENTS
SUMMARY DESCRIPTION . . . . . . . . .... . ... ... . . . .... .... .. . . . . . . . . . . . . . ... .. . . . . .... . 4
Logic Diagram (Figure 2.) . . . . . . .... . ... .. . . ... ... . ... .. .. ... .. . . ... . ... .. .. ... ... .5
16-pin SOIC Connections (Figure 3.) . . . . . . . ... . . . . . . . . . ... .. .. ... .. . ... .. . . ... .. ... . 5
Signal Names (Table 1.) . . .... . . . . .. . . . . . . . . .... . ... .. .. .. . .... ... . . . . . . . . . . . . . . . . 5
28-pin SOIC Connections (Figure 4.) . . . . . . . ... . . . . . . . . . ... .. .. ... .. . ... .. . . ... .. ... . 5
Block Diagram (Figure 5.) . . . . . . . . . . . . . . . . ... .. ... .. .. ... .. .. ... .. .. .... . . ... .. ... . 6
Hardware Hookup (Figure 6.) . . . . . . . . . . . . . ... . . . . . . . . . ... .. .. ... .. . ... .. . . ... .. ... . 7
OPERATING MODES . . . . . . . . . . . . . . . . . . . .... . ... .. .. .. . . . . . . . . . . . . ... . . . .... . ... .. ..8
2-Wire Bus Characteristics . . . . . .... . ... .. . . ... ... . ... .. . . ... .. . . ... . ... .. .. ... ... .8
Serial Bus Data Transfer Sequence (Figure 7.) . . . .... . . . ... . . . . . . . . . . . . . ... .. . . .. .... . 9
Acknowledgement Sequence (Figure 8.) .... .. . .... . ... .. . . . . .... . . . . .. . . . . . . . . .... . . 9
Bus Timing Requirements Sequence (Figure 9.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
AC Characteristics (Table 2.) . . . .... . ... .. . . . . .... .... .. . . . . . . . . . . . . . ... .. . . . . .... 10
Read Mode . . . .... .. . . . . . . . . .... . ... .. . . . . .... .... .. . . . . . . . . . . . . . ... .. . . . . .... 11
Write Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . ... . . . . ... .. ... .. .. ... .. . ... .. . . ... . . . . . 11
Data Retention Mode. . . . . .... . . . . .. . . . . . . . . . . . . . ... ... . . . . . . . . . . . . ... .. . . . . . . . . . 11
Battery Low Warning . . .... ... . ... .. . . ... .. . .... . ... .. . . . . .... . . . . .. . . . . . . . . .... . 11
Slave Address Location (Figure 10.) . . . . . . . . . . . . . . . . . . .... .... ... . . . . . . . . ... .. . . ... . 12
Read Mode Sequences (Figure 11.) . . . . . . . . . . . . . . . . . . .... . . . .... .... .. . .... .. . .... . 12
Alternate Read Mode Sequences (Figure 12.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .... 12
Write Mode Sequence (Figure 13.) . . . . . . . . . . . . .... . ... .. .. .. .... . . . ... . . . . . . . . . . . . . 13
CLOCK OPERATION . . . . . . . . . . . . . . . . .... . . ... .. ... .. .. . . . . . . . . . . . . . . .... . . ... .. ... 14
TIMEKEEPER
Registers. . . . . . . . . . . . . . . . ... .. ... .. .. ... .. .. ... .. .. .... . . ... .. ... 14
TIMEKEEPER Register Map (Table 3.). . . . . . . . . . .... .... .. . . . . . . . . . . . . . ... .. . . . . .... 15
Setting Alarm Clock Registers. . . .... . ... .. . . ... ... . ... .. . . ... .. . .... . ... .. .. ... ... 16
Back-Up Mode Alarm Waveform (Figure 14.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Alarm Interrupt Reset Waveforms (Figure 15.) . . . . .... .... .. . . . . . . . . . . . . . ... .. . . . . .... 17
Alarm Repeat Modes (Table 4.) . . . . . . . . . . . . . . . . . . . . . .... . . . . ... . ... .. . . ... .. . .... . 17
Watchdog Timer . .... . . . .... .... .. . .... .. . .... . ... .. .. .. .... . . . ... . . . . . . . . . . . . . 17
Square Wave Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .... . ... ... . . . . . . . . ... .. .. ... . 18
Square Wave Output Frequency (Table 5.). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Power-on Reset. . . . . . . . . . . . . . . . . . . . . .... . ... .. .. .. . . . . . . . . . . . . ... . . . .... . ... .. .19
Reset Input (RSTIN) . . . . . . . . . . . . . . . . . . . . . . . . . .... ... . . . . . . . . . . . . . . . . . . . . ... .. . . .19
RSTIN Timing Waveform (Figure 16.). . . . . . . . . . . . . . . . . .... .... ... . ... .. . . ... .. . . ... . 19
Reset AC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .... . ... .. .19
Power-fail INPUT/OUTPUT .... . ... .. . . ... .. . .... . ... .. .. .. .... . . . ... . . . . . . . . .... . 20
Calibrating the Clock . . . . . . .... . . .. .. .. .. . . . . . . . . . . . . . ... . . . . . . . . . ... .. .. ... .. . ..20
Output Driver Pin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .... . ... ... 21
Initial Power-on Defaults . . . .... . . .. .. .. .. . . . . . . . . . . . . . ... . . . . . . . . . ... .. .. ... .. . ..21
Century Bit . . . . . . . . . . . . . . .... . . .. .. .. .. . . . . . . . . . . .. . ... . . . . ... .. ... .. .. ... .. . ..21
Crystal Accuracy Across Temperature (Figure 17.) .... .... .. . . . . . . . . . . . . . ... .. . . . . .... 21
Clock Calibration (Figure 18.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .... . ... .. .21
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