M41ST87YMX6TR View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
M41ST87YMX6TR
STMicroelectronics
'M41ST87YMX6TR' PDF : 42 Pages View PDF
M41ST87Y, M41ST87W
Table 7. TIMEKEEPER® Register Map
Addr
D7
D6
D5
Data
Function/Range
D4
D3
D2
D1
D0
BCD Format
00h
01h
ST
0.1 Seconds
10 Seconds
0.01 Seconds
Seconds
10s/100s
Seconds
Seconds
00-99
00-59
02h
OFIE
10 Minutes
Minutes
Minutes 00-59
03h
CB1 CB0
10 Hours
Hours (24 Hour Format)
04h
TR
THS CLRPW1 CLRPW0 32kE
Day of Week
05h PFOD
0
10 Date
Date: Day of Month
Century/
Hours
Day
Date
0-1/
00-23
01-7
01-31
06h
0
07h
0
0
10 Years
10M
Month
Year
Month
Year
01-12
00-99
08h
OUT
FT
S
Calibration
09h
WDS BMB4 BMB3 BMB2 BMB1 BMB0
RB1
0Ah
AFE SQWE ABE
Al 10M
Alarm Month
Control
RB0 Watchdog
Al Month 01-12
0Bh RPT4 RPT5
0Ch RPT3 HT
AI 10 Date
AI 10 Hour
Alarm Date
Alarm Hour
Al Date 01-31
Al Hour 00-23
0Dh RPT2
0Eh RPT1
Alarm 10 Minutes
Alarm 10 Seconds
Alarm Minutes
Alarm Seconds
Al Min
Al Sec
00-59
00-59
0Fh
WDF
AF
0
BL
0
OF
TB1
TB2
Flags
10h
0
0
0
0
0
0
0
0 Reserved
11h
0
0
0
0
0
0
0
0 Reserved
12h
0
0
0
0
0
0
0
0 Reserved
13h
RS3 RS2
RS1
RS0 SQWOD
0
0
0
SQW
14h
TEB1 TIE1
15h
TEB2 TIE2
16h-1Dh
TCM1
TCM2
TPM1 TDS1
TPM2 TDS2
ROM
TCHI/
TCLO1
TCHI/
TCLO2
CLR1EXT
CLR2EXT
CLR1
CLR2
Tamper1
Tamper2
Serial
Number
8-Byte
1Eh-1Fh
20h-9Fh
Reserved
2-Byte
128 User
Bytes
Keys: 0 = Must be set to zero
32kE = 32kHz Output Enable Bit
ABE = Alarm in Battery Back-Up Mode Enable Bit
AF = Alarm flag (Read only)
AFE = Alarm Flag Enable Bit
BL = Battery Low Flag (Read only)
BMB0-BMB4 = Watchdog Multiplier Bits
CB0-CB1 = Century Bits
CLR (1 and 2) = RAM Clear Bits
CLR (1 and 2)EXT = RAM Clear External Bits
CLRPW0 = RAM Clear Pulse Width 0 Bit
CLRPW1 = RAM Clear Pulse Width 1 Bit
FT = Frequency Test Bit
HT = Halt Update Bit
OF = Oscillator Fail Bit
OFIE = Oscillator Fail Interrupt Enable Bit
OUT = Output level
PFOD = Power-fail Output Open Drain Bit
RB0-RB1 = Watchdog Resolution Bits
RPT1-RPT5 = Alarm Repeat Mode Bits
RS0-RS3 = SQW Frequency
S = Sign Bit
SQWE = Square Wave Enable
SQWOD = Square Wave Open Drain Bit
ST = Stop Bit
TB (1 and 2) = Tamper Bits (Read only)
TCHI/TCLO (1 and 2) = Tamper Current Hi/Tamper Current
Low Bits
TCM (1 and 2) = Tamper Connect Mode Bits
TDS (1 and 2) = Tamper Detect Sampling Bits
TEB (1 and 2) = Tamper Enable Bits
THS = Threshold Bit
TIE (1 and 2) = Tamper Interrupt Enable Bits
TPM (1 and 2) = Tamper Polarity Mode Bits
TR = trec Bit
WDS = Watchdog Steering Bit
WDF = Watchdog flag (Read only)
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