- 您现在的位置：买卖IC网 > PDF目录45049 > M41ST87YWX6 (STMICROELECTRONICS) 1 TIMER(S), REAL TIME CLOCK, PDSO28 PDF资料下载
参数资料
| 型号： | M41ST87YWX6 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 时钟/数据恢复及定时提取 |
| 英文描述： | 1 TIMER(S), REAL TIME CLOCK, PDSO28 |
| 封装： | 0.300 INCH, PLASTIC, SO-28 |
| 文件页数： | 22/38页 |
| 文件大小： | 569K |
| 代理商： | M41ST87YWX6 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页当前第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页
29/38
M41ST87Y, M41ST87W
Square Wave Output
The M41ST87Y/W offers the user a programma-
ble square wave function which is output on the
SQW/FT pin. RS3-RS0 bits located in 13h estab-
lish the square wave output frequency. These fre-
quencies are listed in Table 13. Once the selection
of the SQW frequency has been completed, the
SQW/FT pin can be turned on and off under soft-
ware control with the Square Wave Enable Bit
(SQWE) located in Register 0Ah.
The SQW/FT output is programmable as an N-
channel, open drain output driver, or a full-CMOS
output driver. By setting the Square Wave Open
Drain Bit (SQWOD) to a '1,' the output will be con-
figured as an open drain (with IOL as specified in
Table 5, page 9). When SQWOD is set to '0,' the
output will be configured as full-CMOS (sink and
source current as specified in Table 5, page 9).
Note: When configured as open drain (SQWOD =
'1'), the SQW/FT pin requires an external pull-up
resistor.
Table 13. Square Wave Output Frequency
Full-time 32kHz Square Wave Output
The M41ST87Y/W offers the user a special 32kHz
square wave function which defaults to output on
the F32k pin (Pin 21) as long as VCC ≥ VSO, and the
oscillator is running (ST Bit = '0'). This function is
available within one second (typ) of initial power-
up and can only be disabled by setting the 32kE
Bit to '0' or the ST Bit to '1.' If not used, the F32k pin
should be disconnected and allowed to float.
Note: The F32k pin is an open drain which requires
an external pull-up resistor.
Square Wave Bits
Square Wave
RS3
RS2
RS1
RS0
Frequency
Units
0
None
–
0
1
32.768
kHz
0
1
0
8.192
kHz
0
1
4.096
kHz
0
1
0
2.048
kHz
0
1
0
1
1.024
kHz
0
1
0
512
Hz
0
1
256
Hz
1
0
128
Hz
10
01
64
Hz
10
32
Hz
10
11
16
Hz
11
008
Hz
11
014
Hz
11
102
Hz
11
111
Hz
相关PDF资料 |
PDF描述 |
|---|---|
| M41T00M6F | REAL TIME CLOCK, PDSO8 |
| M41T00M6E | REAL TIME CLOCK, PDSO8 |
| M41T00M6 | 0 TIMER(S), REAL TIME CLOCK, PDSO8 |
| M41T0DS6 | REAL TIME CLOCK, PDSO8 |
| M41T0DS6T | REAL TIME CLOCK, PDSO8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| M41ST95W | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5.0 or 3.0V, 512 bit (64 bit X 8) Serial RTC (SPI) SRAM and NVRAM Supervisor |
| M41ST95WMH6 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5.0 or 3.0V, 512 bit (64 bit X 8) Serial RTC (SPI) SRAM and NVRAM Supervisor |
| M41ST95WMH6E | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5.0 or 3.0V, 512 bit (64 bit X 8) Serial RTC (SPI) SRAM and NVRAM Supervisor |
| M41ST95WMH6F | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5.0 or 3.0V, 512 bit (64 bit X 8) Serial RTC (SPI) SRAM and NVRAM Supervisor |
| M41ST95WMH6TR | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5.0 or 3.0V, 512 bit (64 bit X 8) Serial RTC (SPI) SRAM and NVRAM Supervisor |
发布紧急采购，3分钟左右您将得到回复。