AC164140 Microchip Technology, AC164140 Datasheet - Page 10

• Manufacturer Part Number: AC164140
• Description: MCP79410 RTCC PICtail Plus Daughter Board Memory Kits
• Manufacturer: Microchip Technology
• Series: PICtail™ Plusr

Specifications of AC164140

• Main Purpose: Timing, Real Time Clock (RTC)
• Embedded: -
• Utilized Ic / Part: MCP79410
• Primary Attributes: For Use With Explorer 16, PICDEM PIC18 Explorer, XLP DEV Board, PICkit Serial Analyzer
• Secondary Attributes: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

MCP7941X
4.0
The MCP7941x family is a highly integrated RTCC. On-
board time and date counters are driven from a low-
power oscillator to maintain the time and date. An
integrated V
the time and date and also the contents of the SRAM
during a V
4.1
The RTCC registers are contained in addresses
0x00h-0x1fh. 64 bytes of user-accessable SRAM are
located in the address range 0x20-0x5f. The SRAM
memory is a separate block from the RTCC control
and Configuration registers. All SRAM locations are
battery-backed-up during a V
locations are not accessible, MCP7941X will noACK
after the address byte if the address is out of range.
The shaded areas are not implemented and read as
‘0’. No error checking is provided when loading time
and date registers.
• Addresses 0x00h-0x06h are the RTCC Time and
• Incorrect data can appear in the Time and Date
• Addresses 0x07h-0x09h are the device Configu-
• Addresses 0x0Ah-0x10h are the Alarm 0 regis-
• Addresses 0x11h-0x17h are the same as 0x0Bh-
• Addresses 0x18h-0x1Fh are used for the time-
The Memory Map is shown in
DS22266B-page 10
Date registers. These are read/write registers.
Care must be taken when writing to these regis-
ters with the oscillator running.
registers if a write is attempted during the time
frame where these internal registers are being
incremented. The user can minimize the likeli-
hood of data corruption by ensuring that any
writes to the Time and Date registers occur before
the contents of the second register reach a value
of 0x59H.
ration, Calibration and ID Unlock registers.
ters. These are used to set up the Alarm 0, the
Interrupt polarity and the Alarm 0 Compare.
0x11h but are used for Alarm 1.
stamp feature.
RTCC FUNCTIONALITY
RTCC MEMORY MAP
CC
CC
power failure.
switch enables the device to maintain
Table
CC
power fail. Unused
4-1.
Preliminary
 2011 Microchip Technology Inc.