# caravel io spec

- total 61 PADs
- 45 signals
- 16 power/gound

## signal

- total 45 singals

inout wire gpio,
inout wire [`MPRJ_IO_PADS-1:0] mprj_io,
input wire clock,
input wire resetb,

output wire flash_csb,
output wire flash_clk,
output wire flash_io0,
output wire flash_io1

- MPRJ_IO_PADS = 19*2 = 38

defines.v:`define MPRJ_IO_PADS_1 19     /* number of user GPIO pads on user1 side */
defines.v:`define MPRJ_IO_PADS_2 19     /* number of user GPIO pads on user2 side */
defines.v:`define MPRJ_IO_PADS (`MPRJ_IO_PADS_1 + `MPRJ_IO_PADS_2)

## power ground pad
- each side 4 pins, total 16 pins

VDD
VSS
IOVDD
IOVSS