- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄45051 > M48T212V-85MH6F (STMICROELECTRONICS) REAL TIME CLOCK, PDSO44 PDF資料下載
參數(shù)資料
| 型號： | M48T212V-85MH6F |
| 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, LEAD FREE, PLASTIC, SOH-44 |
| 文件頁數(shù)： | 8/32頁 |
| 文件大小： | 473K |
| 代理商： | M48T212V-85MH6F |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁當(dāng)前第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁
M48T212Y, M48T212V
16/32
Setting the Alarm Clock
Address locations 6h-2h contain the alarm set-
tings. The alarm can be configured to go off at a
prescribed time on a specific month, date, hour,
minute, or second or repeat every year, month,
day, hour, minute, or second. It can also be pro-
grammed to go off while the M48T212Y/V is in the
battery back-up to serve as a system wake-up call.
Bits RPT5-RPT1 put the alarm in the repeat mode
of operation. Table 8 shows the possible configu-
rations. Codes not listed in the table default to the
once per second mode to quickly alert the user of
an incorrect alarm setting.
Note: User must transition address (or toggle chip
enable) to see Flag Bit change.
When the clock information matches the alarm
clock settings based on the match criteria defined
by RPT5-RPT1, the AF (Alarm Flag) is set.
If AFE (Alarm Flag Enable) is also set, the alarm
condition activates the IRQ/FT pin. To disable
alarm, write '0' to the Alarm Date registers and
RPT1-5. The IRQ/FT output is cleared by a READ
to the Flags Register as shown in Figure 8. A sub-
sequent READ of the Flags Register is necessary
to see that the value of the Alarm Flag has been
reset to '0.'
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 M48T212Y/V was in the deselect mode
during power-up. Figure 9., page 17 illustrates the
back-up mode alarm timing.
Figure 8. Alarm Interrupt Reset Waveforms
Table 8. Alarm Repeat Modes
RPT5
RPT4
RPT3
RPT2
RPT1
Alarm Setting
1111
1
Once per Second
1111
0
Once per Minute
1110
0
Once per Hour
1100
0
Once per Day
1000
0
Once per Month
0000
0
Once per Year
AI03021
A0-A3
ACTIVE FLAG BIT
ADDRESS 0h
IRQ/FT
HIGH-Z
1h
Fh
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| M48T212Y-70MH6 | 0 TIMER(S), REAL TIME CLOCK, PDSO44 |
| M48T212Y-70MH6TR | 0 TIMER(S), REAL TIME CLOCK, PDSO44 |
| M48T248V-70PM1 | 0 TIMER(S), REAL TIME CLOCK, PDIP32 |
| M48T248Y-85PM1 | 0 TIMER(S), REAL TIME CLOCK, PDIP32 |
| M48T248Y-85PM1TR | 0 TIMER(S), REAL TIME CLOCK, PDIP32 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M48T212V-85MH6TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5V/3.3V TIMEKEEPER[ CONTROLLER |
| M48T212VMH | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5V/3.3V TIMEKEEPER[ CONTROLLER |
| M48T212VSH | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5V/3.3V TIMEKEEPER[ CONTROLLER |
| M48T212Y | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5V/3.3V TIMEKEEPER[ CONTROLLER |
| M48T212Y-70MH1 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5V/3.3V TIMEKEEPER[ CONTROLLER |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。