Datasheet

STM705, STM706, STM707, STM708, STM813L Operation
Doc ID 10520 Rev 9 13/33
3.7 Interfacing to microprocessors with bidirectional reset pins
Microprocessors with bidirectional reset pins can contend with the STM705-708 reset
output. For example, if the reset output is driven high and the micro wants to pull it low,
signal contention will result. To prevent this from occurring, connect a 4.7 kΩ resistor
between the reset output and the micro's reset I/O as in Figure 11.
Figure 11. Interfacing to microprocessors with bidirectional reset I/O
AI08836
STMXXX
RST
GND
4.7 k
V
CC
Microprocessor
RST
Buffered reset to other
system components
GND
V
CC