M41T93 Просмотр технического описания (PDF) - STMicroelectronics
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M41T93 Datasheet PDF : 51 Pages
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Clock operation
M41T93
Table 3. Clock/control register map (32 bytes)
Addr
D7
D6
D5
D4
D3
D2
D1
D0
00h
0.1 Seconds
0.01 Seconds
01h ST
10 Seconds
Seconds
02h
0
10 Minutes
Minutes
03h CB1 CB0
10 Hours
Hours (24 Hour Format)
04h
0
0
0
0
0
Day of Week
05h
0
0
10 Date
Date: Day of Month
06h
0
0
0
10M
Month
07h
10 Years
Year
08h OUT
FT
DCS DC4 DC3 DC2 DC1 DC0
09h OFIE BMB4 BMB3 BMB2 BMB1 BMB0 RB1 RB0
0Ah A1IE SQWE ABE Al1 10M
Alarm 1Month
0Bh RPT14 RPT15 AI1 10 Date
Alarm1 Date
0Ch RPT13 HT
AI1 10 Hour
Alarm1 Hour
0Dh RPT12
Alarm1 10 Minutes
Alarm1 Minutes
0Eh RPT11
Alarm1 10 Seconds
0Fh WDF AF1 AF2(1) BL
Alarm1 Seconds
TF
OF
0
0
10h
Timer Countdown Value
11h TE TI/TP TIE
0
0
0
TD1 TD0
12h ACS AC6 AC5 AC4 AC3 AC2 AC1 AC0
13h
14h
15h
16h
17h
18h
19h-
1Fh
RS3
0
RPT24
RPT23
RPT22
RPT21
RS2 RS1 RS0
0
0
0 Al2 10M
RPT25 AI2 10 Date
0
AI2 10 Hour
Alarm2 10 Minutes
Alarm2 10 Seconds
0
AL2E
Alarm2 Month
Alarm2 Month
Alarm2 Date
Alarm2 Minutes
Alarm2 Seconds
User SRAM (7 Bytes)
1. AF2 will always read ‘0’ if the AL2E Bit is set to ‘0’.
OTP
Function/Range BCD
Format
Seconds
00-99
Seconds
00-59
Minutes
00-59
Century/Hours 0-3/00-23
Day
01-7
Date
01-31
Month
01-12
Year
00-99
Digital Calibration
Watchdog
Al1 Month
01-12
Al1 Date
01-31
Al1 Hour
00-23
Al1 Min
00-59
Al1 Sec
00-59
Flags
Timer Value
Timer Control
Analog
Calibration
SQW
SRAM/Al2 Month 01-12
SRAM/Al2 Date 01-31
SRAM/Al2 Hour 00-23
SRAM/Al2 Min 00-59
SRAM/Al2 Sec 00-59
SRAM
0 = Must be set to zero
ABE = Alarm in battery back-up enable Bit
A1IE = Alarm1 interrupt enable bit
AC0-AC6 = analog calibration bits
ACS = analog calibration sign bit
AF1, AF2 = Alarm flag
AL2E = Alarm 2 enable bit
BL = Battery Low Bit
BMB0-BMB4 = Watchdog Multiplier Bits
CB0, CB1 = Century Bits
DC0-DC4 = Digital Calibration Bits
DCS = Digital Calibration Sign Bit
FT = Frequency Test Bit
HT = Halt Update Bit
OF = Oscillator Fail Bit
OUT= Output level
OFIE = Oscillator Fail Interrupt Enable
OTP = OTP Control Bit
RB0-RB2 = Watchdog Resolution Bits
RPT11-RPT15 = Alarm 1 Repeat Mode Bits
RPT21-RPT25 = Alarm 2 Repeat Mode Bits
RS0-RS3 = SQW Frequency
SQWE = Square Wave Enable
SRAM/ALM2 = SRAM/Alarm 2 Bit
ST = Stop Bit
TD0, TD1 = Timer Frequency Bits
TE = Timer Enable Bit
TF = Timer Flag
TI/TP = Timer Interrupt or Pulse
TIE = Timer Interrupt Enable
WDF = Watchdog flag
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