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参数资料
| 型号： | M41ST87WMX6 |
| 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, ROHS COMPLIANT, PLASTIC, SOX-28 |
| 文件页数： | 24/52页 |
| 文件大小： | 689K |
| 代理商： | M41ST87WMX6 |
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Clock operation
M41ST87Y, M41ST87W
Doc ID 9497 Rev 8
3.1
TIMEKEEPER registers
The M41ST87Y/W offers 22 internal registers which contain clock, control, alarm, watchdog,
flag, square wave, and tamper data. The 8 clock registers are memory locations which
contain external (user accessible) and internal copies of the data (usually referred to as
BiPORT TIMEKEEPER cells). The external copies are independent of internal functions
except that they are updated periodically by the simultaneous transfer of the incremented
internal copy. The internal divider (or clock) chain will be reset upon the completion of a
WRITE to any clock address (00h to 07h).
The system-to-user transfer of clock data will be halted whenever the address being
accessed is a clock address (00h to 07h). The updates will resume either due to a stop
condition or when the pointer increments to a non-clock or RAM address.
TIMEKEEPER and alarm registers store data in BCD format. Control, watchdog and square
wave registers store data in binary format.
Table 7.
TIMEKEEPER register map
Addr
Data
Function/range
BCD format
D7
D6
D5
D4
D3
D2
D1
D0
00h
0.1 seconds
0.01 seconds
10s/100s
seconds
00-99
01h
ST
10 seconds
Seconds
00-59
02h
OFIE
10 minutes
Minutes
00-59
03h
CB1
CB0
10 hours
Hours (24-hour format)
Century/
Hours
0-1/
00-23
04h
TR
THS
CLRPW1 CLRPW0
32kE
Day of week
Day
01-7
05h
PFOD
0
10 date
Date: day of month
Date
01-31
06h
0
10M
Month
01-12
07h
10 Years
Year
00-99
08h
OUT
FT
S
Calibration
Control
09h
WDS
BMB4
BMB3
BMB2
BMB1
BMB0
RB1
RB0
Watchdog
0Ah
AFE
SQWE
ABE
Al 10M
Alarm month
Al month
01-12
0Bh
RPT4
RPT5
AI 10 date
Alarm date
Al date
01-31
0Ch
RPT3
HT
AI 10 hour
Alarm hour
Al hour
00-23
0Dh
RPT2
Alarm 10 minutes
Alarm minutes
Al min
00-59
0Eh
RPT1
Alarm 10 seconds
Alarm seconds
Al sec
00-59
0Fh
WDF
AF
0
BL
0
OF
TB1
TB2
Flags
10h
0
Reserved
11h
0
Reserved
12h
0
Reserved
13h
RS3
RS2
RS1
RS0
SQWOD
0
SQW
14h
TEB1
TIE1
TCM1
TPM1
TDS1
TCHI/
TCLO1
CLR1EXT CLR1
Tamper1
15h
TEB2
TIE2
TCM2
TPM2
TDS2
TCHI/
TCLO2
CLR2EXT CLR2
Tamper2
16h-1Dh
ROM
Serial
number
8-byte
1Eh-1Fh
Reserved
2-byte
20h-9Fh
128 user
bytes
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相关代理商/技术参数 |
参数描述 |
|---|---|
| M41ST87WMX6F | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5.0 V and 3.3/3.0 V secure serial RTC and NVRAM supervisor with tamper detection and 128 bytes of clearable NVRAM |
| M41ST87WMX6TR | 功能描述:实时时钟 Serial 1280 (160x8) RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| M41ST87WSS6 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5.0 V and 3.3/3.0 V secure serial RTC and NVRAM supervisor with tamper detection and 128 bytes of clearable NVRAM |
| M41ST87WSS6F | 功能描述:实时时钟 128 NVRAM Serial RTC 3.0 to 3.6 Vcc RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| M41ST87Y | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5.0, 3.3, or 3.0V, 1280 bit (160 x8) Secure Serial RTC and NVRAM Supervisor with Tamper Detection |
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