ST72F324BJ STMICROELECTRONICS [STMicroelectronics], ST72F324BJ Datasheet - Page 55

• Manufacturer Part Number: ST72F324BJ
• Description: 8-bit MCU, 3.8 to 5.5 V operating range with 8 to 32 Kbyte Flash/ROM, 10-bit ADC, 4 timers, SPI, SCI
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

ST72324B
Figure 30. I/O port general block diagram
Table 27.
1. The diode to V
2. A local protection between the pad and V
3. Off = implemented not activated.
4. On = implemented and activated.
5. NI = not implemented
Output
Input
Register
access
source (ei
External
interrupt
Floating with/without Interrupt
Pull-up with/without Interrupt
Push-pull
Open drain (logic level)
True open drain
DDR SEL
OR SEL
DR SEL
Configuration mode
I/O port mode options
x
DDR
)
DR
OR
DD
is not implemented in the true open drain pads.
Alternate
output
Alternate
enable
If implemented
1
0
1
0
SS
is implemented to protect the device against positive stress.
Pull-up
Off
On
Off
NI
(3)
(4)
N-buffer
Pull-up
condition
P-buffer
CMOS
Schmitt
trigger
Off
On
Off
NI
V
DD
to V
P-buffer
(see table 24 below)
NI
V
On
DD
Diodes
(see table 24 below)
Pull-up
(see table 24 below)
DD
(5)
Alternate
input
(1)
Diodes
Analog
input
Pad
to V
I/O ports
On
SS
55/188
(2)