MCP79510-I/MS Microchip Technology, MCP79510-I/MS Datasheet - Page 15

• Manufacturer Part Number: MCP79510-I/MS
• Description: SPI GP RTCC, 1Kb EE, 64B SRAM, ID 10 MSOP 3x3mm TUBE
• Manufacturer: Microchip Technology

REGISTER 5-9:
REGISTER 5-10:
 2012 Microchip Technology Inc.
bit 7
Legend:
R = Readable bit
bit 7
bit 6
bit 5-4
bit 3
bit 2-0
Note 1:
bit 7
Legend:
R = Readable bit
bit 7-0
Note 1:
OUT
R/W
When RS2 is set to enable the Cal output function, the RTCC counters will continue to increment.
This is an 8-bit register that is used to add or subtract clocks from the RTCC counter every minute. The
CALSGN (0x03:7) is the sign bit and indicates if the count should be added or subtracted. The 8 bits in the
Calibration register, with each bit adding or subtracting two clocks, gives the user the ability to add or sub-
tract up to 510 clocks per minute.
bit 6
OUT: Output Polarity of MFP bit
This bit sets the logic level on the MFP pin when not using this as a square wave output.
SQWE: Squarewave Enable bit
Setting this bit enables the divided output from the crystal oscillator.
ALM<1:0>: Alarm Configuration bits
These bits determine which alarms are active
EXTOSC: External Oscillator Input bit
Enable bit. Setting this bit will allow an external 32.768 kHz signal to drive the RTCC registers,
eliminating the need for an external crystal.
RS<2:0>: Calibration Mode bits
Sets the internal divider for the 32.768 kHz oscillator to be driven to the MFP pin. The following
frequencies are available. The output is responsive to the Calibration register.
CALIBRATION VALUE<7:0>: Calibration Value bits
- 00 – No Alarms are active
- 01 – Alarm 0 is active
- 10 – Alarm 1 is active
- 11 – Both Alarms are active
- 000 – 1 Hz
- 001 – 4.096 kHz
- 010 – 8.192 kHz
- 011 – 32.768 kHz
- 1XX – enables the Cal output function. Cal output appears on MFP if SQWE is set (1 Hz
SQWE
R/W
nominal).
CONTROL REG 0
CALIBRATION 0
bit 5
W = Writable bit
W = Writable bit
ALM1
R/W
X
X
09
08
bit 4
ALM0
R/W
Preliminary
CALIBRATION
R/W
MCP7952X/MCP7951X
bit 3
U = Unimplemented bit, read as ‘0’
U = Unimplemented bit, read as ‘0’
EXTOSC
R/W
R/W
RS2
bit 2
R/W
RS1
bit 1
DS22300A-page 15
bit 0
R/W
RS0
bit 0