ST72F264G ST Microelectronics, ST72F264G Datasheet - Page 42

• Manufacturer Part Number: ST72F264G
• Description: (ST72F260G - ST72F264G) 8-BIT MCU
• Manufacturer: ST Microelectronics

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ST72260G, ST72262G, ST72264G
I/O PORTS (Cont’d)
9.7 DEVICE-SPECIFIC I/O PORT CONFIGURATION
The I/O port register configurations are summa-
rised as follows.
Interrupt Ports
PA7, PA5, PA3:0, PB7:0, PC5:0 (with pull-up)
Table 9. Port Configuration
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floating input
pull-up interrupt input
open drain output
push-pull output
Port A
Port B
Port C
Port
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PA7
PA6
PA5
PA4
PA3:0
PB7:0
PC5:0
Pin Name
MODE
OR = 0
floating
floating
floating
floating
floating
floating
floating
Input (DDR = 0)
DDR
0
0
1
1
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floating interrupt
floating interrupt
pull-up interrupt
pull-up interrupt
pull-up interrupt
pull-up interrupt
pull-up interrupt
OR
OR = 1
0
1
0
1
True Open Drain Interrupt Ports
PA6, PA4 (without pull-up)
floating input
floating interrupt input
open drain (high sink ports)
open drain
open drain
open drain
open drain
open drain
OR = 0
true open-drain
true open-drain
MODE
Output (DDR = 1)
push-pull
push-pull
push-pull
push-pull
push-pull
OR = 1
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DDR
0
0
1
High-Sink
Yes
No
OR
0
1
X
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