TCM810 Microchip Technology Inc., TCM810 Datasheet - Page 6

• Manufacturer Part Number: TCM810
• Description: 3-pin Microcontroller Reset Monitors
• Manufacturer: Microchip Technology Inc.

TCM809/TCM810
4.3
Some microcontrollers have bidirectional reset pins.
Depending on the current drive capability of the control-
ler pin, an indeterminate logic level may result if there
is a logic conflict. This can be avoided by adding a
4.7 k resistor in series with the output of the TCM809/
TCM810 (Figure 4-3). If there are other components in
the system that require a reset signal, they should be
buffered so as not to load the reset line. If the other
components are required to follow the reset I/O of the
microcontroller, the buffer should be connected as
shown with the solid line.
DS21661D-page 6
Controllers and Processors With
Bidirectional I/O Pins
FIGURE 4-3:
Bidirectional RESET I/O.
V
DD
TCM809
RESET
GND
4.7 k
Interfacing the TCM809 to a
© 2005 Microchip Technology Inc.
Buffer
RESET
PICmicro
controller
Micro-
GND
®
Buffered RESET
To Other System
Components