- 您現在的位置：買賣IC網 > PDF目錄45051 > M48T35AV-10MH1F (STMICROELECTRONICS) 0 TIMER(S), REAL TIME CLOCK, PDSO28 PDF資料下載
參數資料
| 型號： | M48T35AV-10MH1F |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 時鐘/數據恢復及定時提取 |
| 英文描述： | 0 TIMER(S), REAL TIME CLOCK, PDSO28 |
| 封裝： | 0.330 INCH, ROHS COMPLIANT, PLASTIC, SOH-28 |
| 文件頁數： | 28/29頁 |
| 文件大?。?/td> | 512K |
| 代理商： | M48T35AV-10MH1F |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第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頁當前第28頁第29頁
Operation modes
M48T35AV
Doc ID 6845 Rev 8
2
Operation modes
As Figure 4 on page 7 shows, the static memory array and the quartz controlled clock
oscillator of the M48T35AV are integrated on one silicon chip. The two circuits are
interconnected at the upper eight memory locations to provide user accessible
BYTEWIDE clock information in the bytes with addresses 7FF8h-7FFFh.
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 7FF8h is the clock control register. This byte controls user access
to the clock information and also stores the clock calibration setting.
The eight clock bytes are not the actual clock counters themselves; they are memory
locations consisting of BiPORT READ/WRITE memory cells. The M48T35AV includes a
clock control circuit which updates the clock bytes with current information once per second.
The information can be accessed by the user in the same manner as any other location in
the static memory array.
The M48T35AV also has its own power-fail detect circuit. The control circuitry constantly
monitors the single 3 V supply for an out of tolerance condition. When VCC is out of
tolerance, the circuit write protects the SRAM, providing a high degree of data security in the
midst of unpredictable system operation brought on by low VCC. As VCC falls below the
battery backup switchover voltage (VSO), the control circuitry connects the battery which
maintains data and clock operation until valid power returns.
Table 2.
Operating modes
Note:
X = VIH or VIL; VSO = Battery backup switchover voltage.
2.1
READ mode
The M48T35AV is in the READ mode whenever W (WRITE enable) is high and E (chip
enable) is low. The unique address specified by the 15 address inputs defines which one of
the 32,768 bytes of data is to be accessed. Valid data will be available at the data I/O pins
within address access time (tAVQV) after the last address input signal is stable, providing that
the E and G access times are also satisfied.
If the E and G access times are not met, valid data will be available after the latter of the chip
enable access time (tELQV) or output enable access time (tGLQV).
Mode
VCC
E
G
W
DQ0-DQ7
Power
Deselect
3.0 to 3.6 V
VIH
X
High Z
Standby
WRITE
VIL
XVIL
DIN
Active
READ
VIL
VIH
DOUT
Active
READ
VIL
VIH
High Z
Active
Deselect
VSO to VPFD (min)
(1)
1.
See Table 11 on page 21 for details.
XXXHigh Z
CMOS standby
Deselect
≤ VSO(1)
XXXHigh Z
Battery backup
mode
相關PDF資料 |
PDF描述 |
|---|---|
| M48T35AY-70MH6F | REAL TIME CLOCK, PDSO28 |
| M48T35AY-70MH6TR | 0 TIMER(S), REAL TIME CLOCK, PDSO28 |
| M48T35AV-10MH1 | 0 TIMER(S), REAL TIME CLOCK, PDSO28 |
| M48T35AY-70MH1F | REAL TIME CLOCK, PDSO28 |
| M48T35AV-10MH6E | REAL TIME CLOCK, PDSO28 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| M48T35AV-10MH1TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:256 Kbit 32Kb x8 TIMEKEEPER SRAM |
| M48T35AV-10MH6 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:256 Kbit 32Kb x8 TIMEKEEPER SRAM |
| M48T35AV-10MH6E | 功能描述:NVRAM 256K (32Kx8) 100ns BULK RoHS:否 制造商:Maxim Integrated 數據總線寬度:8 bit 存儲容量:1024 Kbit 組織:128 K x 8 接口類型:Parallel 訪問時間:70 ns 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 工作電流:85 mA 最大工作溫度:+ 70 C 最小工作溫度:0 C 封裝 / 箱體:EDIP 封裝:Tube |
| M48T35AV-10MH6F | 功能描述:NVRAM 256K (32Kx8) 100ns RoHS:否 制造商:Maxim Integrated 數據總線寬度:8 bit 存儲容量:1024 Kbit 組織:128 K x 8 接口類型:Parallel 訪問時間:70 ns 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 工作電流:85 mA 最大工作溫度:+ 70 C 最小工作溫度:0 C 封裝 / 箱體:EDIP 封裝:Tube |
| M48T35AV-10MH6TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:256 Kbit 32Kb x8 TIMEKEEPER SRAM |
發(fā)布緊急采購，3分鐘左右您將得到回復。