Microchip Technology XLP User Manual page 25

• J4 – Population of this jumper enables the pull-up resistor for the PIC16(L)F1947
SDA line, RD5, supplied to the Serial Accessory Port (SAP). Dependent upon
hardware switch (SW4).
• J5 – Population of this jumper enables the pull-up resistor for the PIC18F87K22
SDA line, RD1, supplied to the Serial Accessory Port (SAP). Dependent upon
hardware switch (SW4).
• J15 – Population of this jumper disables the ability to take current measurements
from the MCU. It is recommended to connect measurement equipment to the
PWR ANALYZER header pins [1 – SRC, 2 – GND], by doing this it is easy to
enable/disable current measurement of the MCU.
• J16 – Population of this jumper disables the ability to take current measurements
from the board. It is recommended to connect measurement equipment to the
PWR ANALYZER header pins [7 – SRC, 6 – GND], by doing this it is easy to
enable/disable current measurement of the board.
• J19 – Population of this jumper enables the use of the POT, R9. If left unpopu-
lated, POT will be disabled.
• J20 – Populating this jumper on pins [1-2] will enable ADC readings from the POT.
Populating this jumper on pins [2-3] will enable ADC reading from the on board
MCP9700 temperature sensor. Leaving this jumper unpopulated will disable the
temperature reading feature.
• J23 – Populating this jumper will enable readings for the PICtail™ IRQ from INT2
(RB2). RB2 is not used in the demonstration program, it is recommended to leave
this jumper populated.
• J24 – Populating this jumper will enable readings for the PICtail IRQ from INT1
(RB1). RB1 is used in the demonstration program for the SELECT (RB1) button.
Populating this jumper will prevent the on-board button switch from working cor-
rectly. SELECT (RB1) is used to wake from Sleep and basic functionality of the
demonstration program. DO NOT populate this jumper if using the demonstration
program.
• J25 – Populating this jumper will enable readings for the PICtail IRQ from INT0
(RB0). RB0 is used in the demonstration program for the DOWN (RB0) button.
Populating this jumper will prevent the on-board button switch from working cor-
rectly. DOWN (RB0) is used for basic functionality of the demonstration program.
DO NOT populate this jumper if using the demonstration program.
• J27 – Populating this jumper will enable the LEDs. The LEDs are not used in the
demonstration program.
3.2.5
There is an on-board hardware switch (SW4) included to allow multiple PIC MCU archi-
tecture functionality on the board. The switch allows the user to choose if a PIC16 or
PIC18 device is being used. By toggling the switch, the user is selecting which pin
sends SDA signal to the on-board SAP. It is important to note that even with the switch
toggled, jumpers J4 or J5 are still required to be populated, depending upon which
device is being used.
3.2.6
Three push buttons switches (SW1/MCLR, SW2, SW3) are provided for user-defined
digital inputs. They are connected to the I/O pins, MCLR/RG5, RB1 and RB0. When
pressed, they pull the respective port pin to ground. Using these switches requires that
the corresponding pins internal weak pull-ups be enabled. When the switches are not
required, the pull-ups can be disabled; this adds the ability to reduce power consump-
tion in software.
 2011 Microchip Technology Inc.
SAP SDA Select Switch
User-Defined Switches
DS41581A-page 25