MCP79510 MAS [Micro Analog systems], MCP79510 Datasheet - Page 2

• Manufacturer Part Number: MCP79510
• Description: 3V SPI Real-Time Clock Calendar with Battery Switchover
• Manufacturer: MAS [Micro Analog systems]

MCP7952X/MCP7951X
Description:
The MCP795XX is a low-power Real-Time Clock/
Calendar (RTCC) that uses digital trimming compen-
sation for an accurate clock/calendar, an interrupt out-
put to support alarms and events, a power sense
circuit that automatically switches to the backup sup-
ply, nonvolatile memory for safe data storage and sev-
eral
requirements.
Along with a low-cost 32,768 kHz crystal, this RTCC
tracks time using several internal registers and then
communicates the data over a 5 MHz SPI bus that is
fast enough to support a programmable millisecond
alarm.
The device is fully accessible through the serial inter-
face, while V
operate down to 1.3V through the backup supply con-
nected to the V
retention only.
As part of the power sense circuit, a time saver
function is implemented to store the time when main
power is lost and again, when power is restored to log
the duration of a power failure.
Along with the on-board serial EEPROM and battery-
backed SRAM, a 128-bit protected space is available
for a unique ID. This space can be ordered
preprogrammed with a MAC address, or blank for the
user to program.
This clock/calendar automatically adjusts for months
with fewer than 31 days including corrections for leap
years. The clock operates in either 24-hour or 12-hour
format with AM/PM indicator and settable alarm(s).
Using the external crystal, the MFP pin can be set to
generate a number of output frequencies.
FIGURE 1-1:
DS22300A-page 2
V
V
CS
X1
X2
BAT
SS
enhanced
CC
OSC
BAT
is between 1.8V and 3.6V, but can
features
input for timekeeping and SRAM
TIME-STAMP
BLOCK DIAGRAM
SRAM
CLKOUT Divider
EEPROM
that
ID
support
SPI
MFP
SCK
system
V
SO
SI
CC
Preliminary
 2012 Microchip Technology Inc.