m41t93 STMicroelectronics, m41t93 Datasheet - Page 18

• Manufacturer Part Number: m41t93
• Description: Serial Spi Bus Rtc With Battery Switchover
• Manufacturer: STMicroelectronics

Table 3.
1. AF2 will always read ‘0’ if the AL2E Bit is set to ‘0’.
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
18/51
Addr
19h-
0Ah
0Bh
0Ch
0Dh
0Eh
0Fh
1Fh
00h
01h
02h
03h
04h
05h
06h
07h
08h
09h
10h
11h
12h
13h
14h
15h
16h
17h
18h
RPT14
RPT13
RPT12
RPT11
RPT24
RPT23
RPT22
RPT21
OFIE
WDF
OUT
A1IE
ACS
CB1
RS3
D7
ST
TE
0
0
0
0
0
Clock/control register map (32 bytes)
SQWE
RPT15
RPT25
BMB4
TI/TP
CB0
AC6
RS2
AF1
0.1 Seconds
HT
D6
FT
0
0
0
0
0
Alarm1 10 Seconds
Alarm2 10 Seconds
Alarm1 10 Minutes
Alarm2 10 Minutes
10 Years
10 Seconds
10 Minutes
BMB3
AF2
DCS
ABE
RS1
AC5
TIE
D5
AI1 10 Date
AI1 10 Hour
AI2 10 Date
AI2 10 Hour
0
0
0
10 Hours
10 Date
(1)
Timer Countdown Value
User SRAM (7 Bytes)
Al1 10M
Al2 10M
BMB2
DC4
10M
AC4
RS0
D4
BL
0
0
BMB1
DC3
AC3
D3
TF
0
0
0
Hours (24 Hour Format)
Date: Day of Month
Alarm1 Seconds
Alarm2 Seconds
BMB0
Alarm1 Minutes
Alarm2 Minutes
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
DC2
Alarm 1Month
Alarm2 Month
Alarm2 Month
0.01 Seconds
AC2
Alarm1 Hour
OF
D2
Alarm1 Date
Alarm2 Date
0
0
Seconds
Minutes
Month
Year
Day of Week
AL2E
DC1
RB1
AC1
TD1
D1
0
DC0
OTP
RB0
TD0
AC0
D0
0
Digital Calibration
SRAM/Al2 Month
SRAM/Al2 Hour
SRAM/Al2 Date
SRAM/Al2 Sec
Century/Hours
SRAM/Al2 Min
Timer Control
Timer Value
Calibration
Function/Range BCD
Al1 Month
Watchdog
Seconds
Seconds
Al1 Hour
Al1 Date
Minutes
Al1 Sec
Al1 Min
Analog
SRAM
Month
SQW
Flags
Date
Year
Day
Format
0-3/00-23
00-99
00-59
00-59
01-31
01-12
00-99
01-12
01-31
00-23
00-59
00-59
01-12
01-31
00-23
00-59
00-59
01-7