L9803 STMicroelectronics, L9803 Datasheet - Page 37
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L9803
Manufacturer Part Number
L9803
Description
Super Smart Power Motor Driver With 8-bit Mcu, Ram, Eeprom, Adc, Wdg, Timers, Pwm And H-bridge Driver
Manufacturer
STMicroelectronics
Datasheet
1.L9803.pdf
(126 pages)
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L9803
be avoided, since they are likely to present unwanted side-effects such as spurious
interrupt generation.
Figure 17. Interrupt I/O Port State Transitions
I/O Port Implementation
The I/O port register configurations are resumed as following.
Port PA(7:0), Port PB(2:0)
RESET status: DR=0, DDR=0 and OR=0 (Input mode, no interrupt).
These ports offer interrupt capabilities.
DDR
0
0
1
1
OR
0
1
0
1
floating/pull-up
interrupt
INPUT
01
(reset state)
floating
INPUT
00
no interrupt (pull-up enabled)
interrupt (pull-up enabled)
open-drain
OUTPUT
Open-Drain output
Push-Pull output
10
XX
MODE
input
input
= DDR, OR
OUTPUT
push-pull
11
On-Chip Peripherals
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