Microchip Developer Explorer 16/32 User Manual page 18

Explorer 16/32 Development Board User's Guide - Developer Help
Explorer 16/32 board with select PIMs immediately without strictly needing
access to a dedicated programming/debug device. A conventional RJ11 ICSP
connector is still retained for use with dedicated Microchip programming/debug
tools. Provisions for a 6-pin inline PICkit style interface is also provided.
Legacy RS-232 UART level translator and connector have been replaced with
the MCP2221A (http://www.microchip.com/MCP2221A) USB to UART/I C
adapter chip and a USB micro-B connector.
New power supply topology. The board may now be operated either fully USB
bus powered or from a dedicated 8 V - 15 V power supply, allowing for
considerably higher 5 V and 3.3 V rail current.
Modified expansion/daughter board topology – The new Explorer 16/32 board
comes with 2x mikroBUS interfaces, which are electrically compatible with a
large suite of existing daughter boards from MikroElektronika. The area used
for the vertical PICtail Plus connector on the classic Explorer 16 has been
re-purposed to accommodate 100 mil female headers for I/O access to PIM
microcontroller pins. Backwards compatibility with existing vertically attached
PICtail Plus daughter cards is maintained through the use of a new "PICtail
Plus Expansion Board" (AC240100 (http://www.microchip.com/AC240100)).
Additional provisions (ex: jumpers and cuttable traces) for tri-stating or
disconnecting hardware (ex: LCD module, EEPROM chip, POT, temperature
sensor) connected to the PIM microcontroller's GPIO pins.
Provisions (unpopulated footprints) for functional expansions (ex: Pmod
interfaces, custom frequency canned oscillators, etc.).
A new net naming scheme has been adopted [where PIM microcontroller GPIO
pin net names are prefixed with "Pxx" where "xx" is a number representing the
PIM pin number that the net is associated with].
Other miscellaneous enhancements, such as a power button, VDD_PIM
current measurement testpoint (and other cuttable trace testpoints for the
other supply rails), new more efficient/lower current indicator LEDs, etc.
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