MCP79412-I/MS Microchip Technology, MCP79412-I/MS Datasheet - Page 17
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MCP79412-I/MS
Manufacturer Part Number
MCP79412-I/MS
Description
Real Time Clock I2C GP RTCC 1Kb EE 64B SRAM EUI-64
Manufacturer
Microchip Technology
Series
-r
Type
Clock/Calendarr
Datasheet
1.MCP79412-ISN.pdf
(40 pages)
Specifications of MCP79412-I/MS
Function
Clock/Calendar
Rtc Memory Size
64 Byte
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Rtc Bus Interface
I2C
Supply Current
1 uA
Features
Alarm, Leap Year, NVSRAM, Square Wave Output, Unique ID
Memory Size
64B
Time Format
HH:MM:SS (12/24 hr)
Date Format
YY-MM-DD-dd
Interface
I²C
Voltage - Supply
1.8 V ~ 5.5 V
Voltage - Supply, Battery
1.3 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
4.2.7
The MCP7941X family of RTCC devices feature a
power-fail time-stamp feature. This feature will store
the time at which V
shown in
supply must be present and the oscillator must also be
running.
There are two separate sets of registers that are used
to record this information:
FIGURE 4-4:
2010-2011 Microchip Technology Inc.
V
V
V
CC
TRIP(min)
TRIP(max)
Figure
POWER-FAIL TIME-STAMP
Power-Down
Time Stamp
4-4. To use this feature, a V
CC
crosses the V
POWER-FAIL GRAPH
TRIP
voltage and is
BAT
• The first set, located at 0x18h through 0x1Bh, is
• The second set of registers, located at 0x1Ch
The power-fail time-stamp registers are cleared when
the V
loaded at the time when V
and the RTCC operates on the V
(register 0x03h bit 4) bit is also set at this time.
through 0x1Fh, is loaded at the time when V
restored and the RTCC switches to V
BAT
bit is cleared in software.
MCP7941X
CC
falls below V
BAT
DS22266C-page 17
Time Stamp
Power-Up
. The V
CC
.
TRIP
BAT
CC
is