Table 26. I/O Port Mode Options; Figure 32. I/O Port General Block Diagram - STMicroelectronics ST72361 Auto Series Manual

ST72361xx-Auto

Figure 32. I/O port general block diagram

REGISTER
ACCESS
EXTERNAL
INTERRUPT
SOURCE (ei
Table 26.
Input
Output
1. NI - not implemented
Off - implemented not activated
On - implemented and activated
Note: The diode to V
the pad and V
ALTERNATE
OUTPUT
ALTERNATE
ENABLE
DR
DDR
OR
If implemented
OR SEL
DDR SEL
DR SEL
1
0
)
x
I/O port mode options
Configuration mode
Floating with/without Interrupt
Pull-up with/without Interrupt
Push-pull
Open Drain (logic level)
True Open Drain
is not implemented in the true open drain pads. A local protection between
DD
is implemented to protect the device against positive stress.
SS
Doc ID 12468 Rev 3
1
0
PULL-UP
CONDITION
N-BUFFER
(1)
Pull-Up P-Buffer
Off
On
Off
NI
P-BUFFER
V
DD
(see table below)
PULL-UP
(see table below)
V
DD
DIODES
(see table below)
ANALOG
INPUT
CMOS
SCHMITT
TRIGGER
ALTERNATE
INPUT
Diodes
Off
On
On
Off
NI NI (see note)
I/O ports
PAD
On
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