4.4 Input Only I/O Cell¶

Figure 4.3 Functional Schematic of CMOS Input Only Pad, gf180mcu_fd_io__in_c

Figure 4.4 Functional Schematic of Schmitt Trigger Input Only Pad, gf180mcu_fd_io__in_s

gf180mcu_fd_io__in_c and gf180mcu_fd_io__in_s are input only pads configured in CMOS and Schmitt trigger modes respectively. Both pads are equipped with pull-up/down programmability. The logical operation of the pad is as shown below.

Input

Output

PU

PD

PAD

Y

X

X

0

0

X

X

1

1

0

1

weak 0

0

1

0

weak 1

1