Teensy 2.0 got ATMEGA32U4 8 bit AVR 16 MHz and 25 lines I/O so i gues enough for my project.
Anyway, other projects are based on a teensy 2.0.
When I edited the file handwire.py to adapt it to my plate I found a part responsible for PCB pins t2.0:
# The number of rows and columns in the matrix. In a hand-wired board
# Of each These will correspond to a single pin.
num_rows = 6
NUM_COLS = 17
.
.
.
matrix_hardware, matrix_strobe, matrix_sense make_matrix_config = (
strobe_cols = strobe_cols,
strobe_low = strobe_low,
rows = [B5, B4, B3, B2, B1, B0]
cols = [D5, C7, C6, D4 D0, E6, F0, F1, F4, F5, F6, F7, D7, D6, D1, D2, D3],
device = firmware.device
)