- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄45050 > M48ST59W-70MH1TR (STMICROELECTRONICS) 0 TIMER(S), REAL TIME CLOCK, PDSO44 PDF資料下載
參數(shù)資料
| 型號(hào)： | M48ST59W-70MH1TR |
| 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(yè)數(shù)： | 10/29頁(yè) |
| 文件大?。?/td> | 158K |
| 代理商： | M48ST59W-70MH1TR |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)當(dāng)前第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)第24頁(yè)第25頁(yè)第26頁(yè)第27頁(yè)第28頁(yè)第29頁(yè)
M48ST59W
18/29
The IRQ/FT pin can also be activated in the bat-
tery back-up mode. The IRQ/FT will go low if an
alarm occurs and both ABE (Alarm in Battery
Back-up Mode Enable) and AFE are set. The ABE
and AFE Bits are reset during power-up, therefore
an alarm generated during power-up will only set
AF. The user can read the Flag Register at system
boot-up to determine if an alarm was generated
while the M48ST59W was in the deselect mode
during power-up. Figure 10 illustrates the back-up
mode alarm timing.
Programmable Interrupts
The M48ST59W provides two programmable in-
terrupts; an alarm and a watchdog. When an inter-
rupt condition occurs, the M48ST59W sets the
appropriate flag bit in the Flag Register 1FF0h.
The interrupt enable Bits (AFE and ABE) in 1FF6h
and the Watchdog Steering Bit (WDS) in 1FF7h al-
low the interrupt to activate the IRQ/FT pin.
The interrupt flags and the IRQ/FT output are
cleared by a READ to the Flags Register. An inter-
rupt condition reset will not occur unless the ad-
dresses are stable at the flag location for at least
15ns while the device is in the READ Mode (see
Figure 11, page 19).
The IRQ/FT pin is an open drain output and re-
quires a pull-up resistor (10k
recommended) to
VCC. The pin remains in the high impedance state
unless an interrupt occurs or the frequency test
mode is enabled.
Table 12. Alarm Repeat Mode
Figure 10. Back-up Mode Alarm Waveform
RPT4
RPT3
RPT2
RPT1
Alarm Activated
1
Once per Second
1
0
Once per Minute
1
0
Once per Hour
1
0
Once per Day
0
Once per Month
ABE, AFE bit in Interrupt Register
AF bit in Flags Register
HIGH-Z
IRQ/FT
HIGH-Z
tREC
VCC
VPFD (max)
VPFD (min)
VSO
AI04610
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| M48ST59W-100MH1 | 0 TIMER(S), REAL TIME CLOCK, PDSO44 |
| M48T02-150PC1 | 0 TIMER(S), REAL TIME CLOCK, PDIP24 |
| M48T18-100MH1TR | 0 TIMER(S), REAL TIME CLOCK, PDSO28 |
| M48T18-100MH1 | 0 TIMER(S), REAL TIME CLOCK, PDSO28 |
| M48T18-150PC1 | 0 TIMER(S), REAL TIME CLOCK, PDIP28 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M48T02 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5.0V, 16 Kbit (2Kb x 8) TIMEKEEPER SRAM |
| M48T02_03 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5.0V, 16 Kbit (2Kb x 8) TIMEKEEPER㈢ SRAM |
| M48T02_07 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5.0V, 16 Kbit (2Kb x 8) TIMEKEEPER SRAM |
| M48T02_10 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5.0 V, 16 Kbit (2 Kb x 8) TIMEKEEPER? SRAM |
| M48T02-120PC1 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:CMOS 8K x 8 TIMEKEEPER SRAM |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。