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參數(shù)資料
| 型號： | M41ST84WMQ6 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 時鐘/數(shù)據(jù)恢復(fù)及定時提取 |
| 英文描述： | 1 TIMER(S), REAL TIME CLOCK, PDSO16 |
| 封裝： | PLASTIC, SOP-16 |
| 文件頁數(shù)： | 24/29頁 |
| 文件大?。?/td> | 481K |
| 代理商： | M41ST84WMQ6 |
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M41ST84W
4/29
SUMMARY DESCRIPTION
The M41ST84W Serial Real-Time Clock is built in
a low power CMOS SRAM process. It has a 64-
byte memory space with 44 bytes of NVRAM and
20 memory-mapped RTC registers (see Table
3., page 14). The RTC registers are configured in
binary coded decimal (BCD) format.
A built-in, low power 32.768kHz oscillator (external
crystal controlled) provides the time base for the
timekeeping and calendar functions.
The basic clock/calendar functions are handled by
the first eight RTC registers, while the other twelve
bytes provide status/control for the Alarm, Watch-
dog, and Square Wave functions.
Addresses and data are transferred serially via the
two line, bi-directional I2C interface. The built-in
address register is incremented automatically af-
ter each WRITE or READ data byte.
The M41ST84W has a built-in power sense circuit
which detects power failures and automatically
switches to the battery supply when a power fail-
ure occurs. The energy needed to sustain the
SRAM and clock operations can be supplied by a
small lithium button-cell supply when a power fail-
ure occurs. Functions available to the user include
a non-volatile, time-of-day clock/calendar, Alarm
interrupts, Watchdog Timer and programmable
Square Wave output. Other features include a
Power-On Reset as well as an additional input
(RSTIN) which can also generate an output Reset
(RST). The eight clock address locations contain
the century, year, month, date, day, hour, minute,
second and tenths/hundredths of a second in 24
hour BCD format. Corrections for 28, 29 (leap year
- valid until year 2100), 30 and 31 day months are
made automatically.
The M41ST84W is supplied in a 16-lead SOIC
package.
Figure 2. Logic Diagram
Table 1. Signal Names
AI03677
SCL
VCC
M41ST84W
VSS
SDA
RSTIN
IRQ/FT/OUT
SQW
WDI
PFI
RST
PFO
VBAT
XI
XO
XI
Oscillator Input
XO
Oscillator Output
IRQ/FT/OUT
Interrupt/Frequency Test/Out
Output (Open Drain)
PFI
Power Fail Input
PFO
Power Fail Output
RST
Reset Output (Open Drain)
RSTIN
Reset Input
SCL
Serial Clock Input
SDA
Serial Data Input/Output
SQW
Square Wave Output
WDI
Watchdog Input
VCC
Supply Voltage
VBAT
Battery Supply Voltage
VSS
Ground
NC
No Connect
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M41ST84WMQ6E | 功能描述:實(shí)時時鐘 Serial 512 (64x8) RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| M41ST84WMQ6F | 功能描述:實(shí)時時鐘 Serial 512 (64x8) RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| M41ST84WMQ6TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:3.0/3.3V I2C Serial RTC with Supervisory Functions |
| M41ST84WSH | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5.0 or 3.0V, 512 bit 64 x 8 SERIAL RTC with SUPERVISORY FUNCTIONS |
| M41ST84Y | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:5.0 or 3.0V, 512 bit 64 x 8 SERIAL RTC with SUPERVISORY FUNCTIONS |
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