MCP7940N_13 Datasheet, PDF (11/42 Pages) Microchip Technology – Low-Cost I2C™ Real-Time Clock/Calendar with SRAM and Battery Switchover

MCP7940N
TABLE 5-1: RTCC MEMORY MAP
Address
Bit 7
Bit 6
Bit 5
Bit 4
00h
ST
01h
02h
03h
12/24
10 Seconds
10 Minutes
10 Hour 10 Hour
AM/PM
OSCON VBAT
Bit 3
Bit 2 Bit 1 Bit 0
Function
Seconds
Minutes
Hour
Seconds
Minutes
Hours
VBATEN
Day
Day
04h
05h
06h
07h
OUT
08h
09h
10 Date
Date
Date
LP
10 Month
Month
Month
10 Year
Year
Year
SQWE ALM1
ALM0
EXTOSC RS2 RS1 RS0 Control Reg.
CALIBRATION
Calibration
RESERVED – DO NOT USE
0Ah
10 Seconds
Seconds
0Bh
10 Minutes
Minutes
0Ch
10 Hour 10 Hours
Hour
12/24
AM/PM
0Dh
ALM0POL ALM0C2 ALM0C1 ALM0C0 ALM0IF
Day
0Eh
10 Date
Date
0Fh
10 Month
Month
10h
Reserved – Do not use
Seconds
Minutes
Hours
Day
Date
Month
Reserved
11h
10 Seconds
Seconds
12h
10 Minutes
Minutes
13h
10 Hour 10 Hours
Hour
12/24
AM/PM
14h
ALM1POL ALM1C2 ALM1C1 ALM1C0 ALM1IF
Day
15h
10 Date
Date
16h
10 Month
Month
17h
Reserved – Do not use
18h
10 Minutes
Minutes
19h
10 Hour 10 Hours
Hour
12/24
AM/PM
1Ah
10 Date
Date
1Bh
Day
10 Month
Month
1Ch
10 Minutes
Minutes
1Dh
10 Hour 10 Hours
Hour
12/24
AM/PM
1Eh
10 Date
Date
1Fh
Day
10 Month
Month
Seconds
Minutes
Hours
Day
Date
Month
Reserved
Range
00-59
00-59
1-12 + AM/PM
00 - 23
1-7
Reset
State
00h
00h
00h
01h
01-31
01h
01-12
01h
00-99
01h
80h
00h
00h
00-59
00h
00 - 59
00h
1-12 + AM/PM 00h
00-23
1-7
01h
01-31
01h
01-12
01h
01h
00-59
00h
00-59
00h
1-12 + AM/PM 00h
00-23
1-7
01h
01-31
01h
01-12
01h
01h
00h
00h
00h
00h
00h
00h
00h
00h
 2011-2013 Microchip Technology Inc.
DS25010E-page 11