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参数资料
| 型号： | M48T212V-70MH1TR |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 时钟/数据恢复及定时提取 |
| 英文描述： | 0 TIMER(S), REAL TIME CLOCK, PDSO44 |
| 封装： | SNAPHAT, PLASTIC, SO-44 |
| 文件页数： | 2/23页 |
| 文件大小： | 150K |
| 代理商： | M48T212V-70MH1TR |
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.
相关PDF资料 |
PDF描述 |
|---|---|
| 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 |
| M48T212V-85MH6E | REAL TIME CLOCK, PDSO44 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| M48T212V-70MH6 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5V/3.3V TIMEKEEPER[ CONTROLLER |
| M48T212V-70MH6E | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5V/3.3V TIMEKEEPER CONTROLLER Supervisor |
| M48T212V-70MH6F | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5V/3.3V TIMEKEEPER CONTROLLER Supervisor |
| M48T212V-70MH6TR | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5V/3.3V TIMEKEEPER[ CONTROLLER |
| M48T212V-85MH1 | 功能描述:监控电路 SRAM TK 16X8 85ns RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
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