- 您現(xiàn)在的位置：買(mǎi)賣(mài)IC網(wǎng) > PDF目錄224146 > M48T128V (意法半導(dǎo)體) 3.3V-5V 1 Mbit 128Kb x8 TIMEKEEPER SRAM PDF資料下載
參數(shù)資料
| 型號(hào)： | M48T128V |
| 廠(chǎng)商： | 意法半導(dǎo)體 |
| 元件分類(lèi)： | SRAM |
| 英文描述： | 3.3V-5V 1 Mbit 128Kb x8 TIMEKEEPER SRAM |
| 中文描述： | 3.3 - 5V的1兆位的SRAM 128KB的x8計(jì)時(shí)器 |
| 文件頁(yè)數(shù)： | 19/22頁(yè) |
| 文件大小： | 340K |
| 代理商： | M48T128V |
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)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)當(dāng)前第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)
M48T128Y, M48T128V*
6/22
OPERATION MODES
Figure 4., page 5 illustrates the static memory ar-
ray and the quartz controlled clock oscillator. The
clock locations contain the year, month, date, day,
hour, minute, and second in 24 hour BCD format.
Corrections for 28, 29 (leap year - valid until 2100),
30, and 31 day months are made automatically.
Byte 1FFF8h is the clock control register. This byte
controls user access to the clock information and
also stores the clock calibration setting. The seven
clock bytes (1FFFFh - 1FFF8h) are not the actual
clock counters, they are memory locations consist-
ing of BiPORT READ/WRITE memory cells
within the static RAM array. The M48T128Y/V in-
cludes a clock control circuit which updates the
clock bytes with current information once per sec-
ond. The information can be accessed by the user
in the same manner as any other location in the
static memory array. The M48T128Y/V also has its
own Power-Fail Detect circuit. This control circuitry
constantly monitors the supply voltage for an out
of tolerance condition. When VCC is out of toler-
ance, the circuit write protects the TIMEKEEPER
Register data and external SRAM, providing data
security in the midst of unpredictable system oper-
ation. As VCC falls below the Battery Back-up
Switchover Voltage (VSO), the control circuitry au-
tomatically switches to the battery, maintaining
data and clock operation until valid power is re-
stored.
Table 2. Operating Modes
Note: X = VIH or VIL; VSO = Battery Back-up Switchover Voltage.
1. See Table 11., page 18 for details.
Mode
VCC
E
G
W
DQ0-DQ7
Power
Deselect
4.5 to 5.5V
or
3.0 to 3.6V
VIH
X
High Z
Standby
WRITE
VIL
X
VIL
DIN
Active
READ
VIL
VIH
DOUT
Active
READ
VIL
VIH
High Z
Active
Deselect
VSO to VPFD (min)
(1)
X
High Z
CMOS Standby
Deselect
≤ VSO(1)
X
High Z
Battery Back-up Mode
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| M48T12 | 16 Kbit 2Kb x8 TIMEKEEPER[ SRAM |
| M48T12-150PC1 | 16 Kbit 2Kb x8 TIMEKEEPER[ SRAM |
| M48T12-200PC1 | 16 Kbit 2Kb x8 TIMEKEEPER[ SRAM |
| M48T12-70PC1 | 16 Kbit 2Kb x8 TIMEKEEPER[ SRAM |
| M4R16XBJFREQ | CRYSTAL OSCILLATOR, CLOCK, 19.44 MHz - 200 MHz, PECL OUTPUT |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M48T128V-70PM1 | 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:3.3V-5V 1 Mbit 128Kb x8 TIMEKEEPER SRAM |
| M48T128V-70PM1TR | 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:3.3V-5V 1 Mbit 128Kb x8 TIMEKEEPER SRAM |
| M48T128V-80PM1 | 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:5.0 or 3.3 V, 1 Mbit (128 Kb x 8) TIMEKEEPER?? SRAM |
| M48T128V-85PM1 | 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:3.3V-5V 1 Mbit 128Kb x8 TIMEKEEPER SRAM |
| M48T128V-85PM1TR | 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:3.3V-5V 1 Mbit 128Kb x8 TIMEKEEPER SRAM |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。