ZXCM209

ZXCM210

ISSUE 3 - FEBUARY 2001

v

cc

ZXCM

Reset

Output

Gnd

v

cc

Micro

Reset

Input

Gnd

v

cc

4.7k

Ω

to other

circuits

Interfacing to µP’s with bidirectional reset I/O

The ZXCM series can be used with microprocessors

havng bidirectional reset pins, such as Motorola 68HC11

series. The addition of a 4.7k resistor between the ZXCM

reset output and the processor input ensures correct

operation of the reset circuit. A buffer to other circuit

components is then required to enable the processor

reset drive to operate correctly. The circuit

configuration is shown in Figure 2.

PIN DESCRIPTION

Pin

Number

Pin Name

Pin Function

Supply voltage (+5, +3.3, +3 volts)

2

RESET

(ZXCM209)

RESET

(ZXCM210)

Output remains low while Vcc is below the reset threshold, and for a

3

Gnd

Ground

1

2

3

Figure 2

Interfacing to µP’s with bidirectional reset I/O.

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