MCP795W10-I/SL Microchip Technology, MCP795W10-I/SL Datasheet - Page 13

• Manufacturer Part Number: MCP795W10-I/SL
• Description: SPI GPP RTCC, 1Kb EE, 64B SRAM, WD Timer, Event Detect, ID 14 SOIC .150in TUBE
• Manufacturer: Microchip Technology

REGISTER 5-4:
REGISTER 5-5:
 2011-2012 Microchip Technology Inc.
bit 7
Legend:
R = Readable bit
bit 7
bit 6
bit 5
bit 4
bit 3-0
Note 1:
bit 7
Legend:
R = Readable bit
bit 7-6
bit 5
bit 4
bit 3
bit 2-0
Note 1:
CALSGN
R/W
U-0
—
Contains the BCD hour in bits <3:0>. Bits <5:4> contain either the 10-hour in BCD for 24-hour format or
the AM/PM indicator and the 10-hour bit for 12-hour format. Bit 5 determines the hour format.
Contains the BCD day. The range is 1-7. Also, additional bits are used for configuration and status.
bit 6
CALSGN: Calibration Sign bit
Bit 7 is the sign bit (CALSGN) for the calibration. Clearing this bit produces a positive calibration,
setting this bit produces a negative calibration.
12/24: Clearing this bit to ‘0’ enables 24-hour format, setting this bit to ‘1’ enables 12-hour format.
10 HOUR: AM/PM bit for 12-hour time
10 HOUR
HOUR<3:0>
bit 6
Unimplemented: Read as ‘0’
OSCON: Oscillator On bit
This bit is set and cleared by hardware. If this bit is set, the oscillator is running; if
clear, the oscillator is not running. This bit does not indicate that the oscillator is running at the correct
frequency. The bit will wait 32 oscillator cycles before the bit is set.
VBAT: External Battery Switched Flag bit
This bit is set by hardware when the V
RTCC registers. This bit is cleared by software.
VBATEN: External Battery Enable bit
If this bit is set the internal circuitry is connected to the V
disconnected and the only current drain on the external battery is the V
DAY<2:0>
12/24
R/W
U-0
—
HOUR 0
DAY 0
X
bit 5
W = Writable bit
04
bit 5
W = Writable bit
X
03
OSCON
10 Hour
AM/PM
R/W
R
bit 4
bit 4
10 Hour
MCP795WXX/MCP795BXX
VBAT
R/W
R/W
Preliminary
CC
fails and the V
bit 3
U = Unimplemented bit, read as ‘0’
bit 3
U = Unimplemented bit, read as ‘0’
VBATEN
R/W
BAT
BAT
bit 2
is used to power the oscillator and the
pin. If this bit is ‘0’ then the V
Hour
R/W
BAT
pin leakage.
R/W
Day
DS22280B-page 13
BAT
pin is
bit 0
bit 0