stm6823sjwy6f STMicroelectronics, stm6823sjwy6f Datasheet - Page 12

• Manufacturer Part Number: stm6823sjwy6f
• Description: 5-pin Supervisor With Watchdog Timer And Push-button Reset
• Manufacturer: STMicroelectronics

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Figure 12. Ensuring RST valid to V
Figure 13. Ensuring RST valid to V
1. This configuration does not work on open drain outputs of the STM6321/6322/6822.
Interfacing to microprocessors with bi-directional reset pins
Microprocessors with bi-directional reset pins can contend with the STM6321 / 6322 / 6821 /
6822 / 6823 / 6824 / 6825 reset output. For example, if the reset output is driven high and the
microprocessor wants to pull it low, signal contention will result. To prevent this from
occurring, connect a 4.7kΩ resistor between the reset output and the microprocessor’s reset
I/O as in
Figure 14. Interfacing to microprocessors with bi-directional reset I/O
Figure
14.
STM6XXX
GND
V
CC
RST
CC
CC
GND
GND
STM6XXX
STM6XXX
= 0, (active-low push-pull outputs)
= 0, (active-high, push-pull outputs)
4.7k
V
RST
V
RST
CC
CC
Buffered Reset to other
System Components
V
V
CC
Microprocessor
RST
CC
R1
R1
AI09138
AI09139
GND
V
CC
AI09135