M48T201V-70MH1 STMICROELECTRONICS [STMicroelectronics], M48T201V-70MH1 Datasheet - Page 15

• Manufacturer Part Number: M48T201V-70MH1
• Description: 3.3V-5V TIMEKEEPER CONTROLLER
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Table 5. TIMEKEEPER
Keys: S = Sign Bit
Address
7FFFDh
7FFFCh
7FFFFh
7FFFEh
7FFFBh
7FFFAh
7FFF9h
7FFF8h
7FFF7h
7FFF6h
7FFF5h
7FFF4h
7FFF3h
7FFF2h
7FFF1h
7FFF0h
FT = Frequency Test Bit
R = READ Bit
W = WRITE Bit
ST = Stop Bit
0 = Must be set to '0'
WDS = Watchdog Steering Bit
AF = Alarm Flag
BL = Battery Low Flag
RPT4
RPT3
RPT2
RPT1
WDS
WDF
AFE
D7
ST
W
0
0
0
0
0
SQWE
BMB4
RPT5
D6
FT
AF
1000 Years
R
0
0
0
0
Alarm 10 Seconds
10 Years
Alarm 10 Minutes
®
10 Seconds
10 Minutes
Register Map
BMB3
ABE
Al. 10 Hours
D5
Al. 10 Date
S
0
0
0
10 Hours
10 Date
Al.10M
BMB2
10 M
D4
BL
0
Data
BMB1
RS3
D3
0
Hours (24 Hour Format)
Calibration
Date: Day of Month
Alarm Seconds
BMB0
Alarm Minutes
RS2
Alarm Month
Alarm Hours
D2
Alarm Date
100 Years
Seconds
Minutes
Month
Year
SQWE = Square Wave Enable Bit
BMB0-BMB4 = Watchdog Multiplier Bits
RB0-RB1 = Watchdog Resolution Bits
AFE = Alarm Flag Enable Flag
ABE = Alarm in Battery Back-Up Mode Enable Bit
RPT1-RPT5 = Alarm Repeat Mode Bits
WDF = Watchdog Flag
RS0-RS3 = SQW Frequency
RB1
RS1
Day
D1
RB0
RS0
D0
Al. Seconds
Al. Minutes
Watchdog
Al. Month
Al. Hours
Seconds
Al. Date
Century
M48T201Y, M48T201V
Minutes
Control
Month
Hours
Flags
Date
Year
Day
Function/Range
BCD Format
00-99
01-12
01-31
01-07
00-23
00-59
00-59
01-12
01-31
00-23
00-59
00-59
00-99
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