Digilent 410-218P-KIT - Manual (Page 2)

PmodRTCC Reference Manual
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Multi-Function Pin (MFP)
The MFP can be accessed via the 2-pin
header J1. The MFP has an open drain
output. To use it, an external 3.3V 2-10K-ohm
pull-up resistor is required.
The MFP can have several different functions
including user-controllable output, alarm
output, and clock frequency output, depending
on the settings in the RTCC registers. Settings
and functions are described in the MFP section
of the MCP79410 datasheet.
Alarms
The MCP79410 has two alarms. Each can be
set to trigger an alarm interrupt flag at a
particular time, driving the MFP high or low
depending on how the polarity bit is set.
Calibration
The Calibration register in the MCP79410 can
calibrate the device to correct for inaccuracies
of the input clock source. It can add or subtract
up to 254 clocks from the RTCC counter every
minute. For more information, see the
Calibration section of the MCP74910
datasheet.
Connector J1 – MFP Header
Pin
Signal Description
1 MFP Multi-Function Pin
2 GND Power Supply Ground