
MC97F6108A User’s manual
3. Port structures
21
DATA
REGISTER
DIRECTION
REGISTER
PORTx INPUT
PAD
VDD
VDD
Schmitt Level
Input
Level Shift (1.8V to ExtVDD)
Level Shift (ExtVDD to 1.8V)
MUX
1
0
Analog Channel enable
ANALOG INPUT
Digital Input blocking enable
OPEN-DRAIN
REGISTER
PULL-UP
REGISTER
VDD
Figure 6. Analog Input I/O Port