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參數(shù)資料
| 型號(hào)： | M48T212V-70MH6 |
| 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： | SNAPHAT, PLASTIC, SO-44 |
| 文件頁(yè)數(shù)： | 2/23頁(yè) |
| 文件大?。?/td> | 150K |
| 代理商： | M48T212V-70MH6 |
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M48T212Y, M48T212V
10/23
Figure 8. Write Cycle Timing: RTC Control Signals
AI02641
W
DQ0-DQ7
G
DATA IN
VALID
ADDRESS
tAVAV
E
tAVEH
tAVAV
WRITE
READ
DATA OUT
VALID
DATA OUT
VALID
tAVWH
tAVQV
tWLWH
tWHDX
tWHAX
tWHQX
tWLQZ
tDVWH
tGLQV
tEHQZ
tDVEH
DATA IN
VALID
tELEH
tEHAX
tAVEL
tEHDX
tAVWL
WRITE MODE
The M48T212Y/V is in the Write Mode whenever
W (Write Enable) and E (Chip Enable) are in a low
state after the address inputs are stable. The start
of a write is referenced from the latter occurring
falling edge of W or E. A write is terminated by the
earlier rising edge of W or E. The addresses must
be held valid throughout the cycle. E or W must re-
turn high for a minimum of tEHAX from Chip Enable
or tWHAX from Write Enable prior to the initiation of
another read or write cycle. Data-in must be valid
tDVWH prior to the end of write and remain valid for
tWHDX afterward.
G should be kept high during write cycles to avoid
bus contention; although, if the output bus has
been activated by a low on E and G a low on W will
disable the outputs tWLQZ after W falls.
When E is low during the write, one of the on-
board TIMEKEEPER registers will be selected and
data will be written into the device. When EX is low
(and E is high) an external SRAM location is se-
lected.
Note: Care should be taken to avoid taking both E
and EX low simultaneously to avoid bus conten-
tion.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| M48T212V-70MH1TR | 0 TIMER(S), REAL TIME CLOCK, PDSO44 |
| M48T212V-85MH6 | 0 TIMER(S), REAL TIME CLOCK, PDSO44 |
| M48T212Y-70MH1TR | 0 TIMER(S), REAL TIME CLOCK, PDSO44 |
| M48T212Y-70MH1F | REAL TIME CLOCK, PDSO44 |
| M48T212Y-70MH1 | 0 TIMER(S), REAL TIME CLOCK, PDSO44 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M48T212V-70MH6E | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5V/3.3V TIMEKEEPER CONTROLLER Supervisor |
| M48T212V-70MH6F | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5V/3.3V TIMEKEEPER CONTROLLER Supervisor |
| M48T212V-70MH6TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5V/3.3V TIMEKEEPER[ CONTROLLER |
| M48T212V-85MH1 | 功能描述:監(jiān)控電路 SRAM TK 16X8 85ns RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| M48T212V-85MH1E | 功能描述:監(jiān)控電路 SRAM TK 16X8 85ns RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過電壓閾值: 輸出類型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
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