Ramtron

FM573/574

27 March 2001

5/10

Figure 3. Applications

kHz Control & Monitoring

a1

a2

a3

a4

b1

b2

b3

b4

VDD1

a1

a2

a3

a4

b1

b2

b3

b4

GND

D

0

D

7

Q

0

Q

7

FM574

Timer output

= 1 kHz

Selector

Relay

MCU

D0

D7

Q

0

Q

7

FM574

Relay

Power-fail & Watchdog Reset

Event Capture

Joystick

DAC

2

D0-7

3

A

3

A

4

DAC

1

A

2

A

1

A/D

8

D

0

D

7

Q

0

Q

7

FM573

Hold

To

Controller

Nonvolatile Track & Hold

Microprocessor

RST

D

0

D

7

Q

0

Q

7

FM574

PB

1

ST

7

VDD

8

TD

2

RST

6

TOL

3

RST

5

GND

4

1232

Dog

FM574

Timing

VDD

4.5V

2.5V

2.0V

RST

4.5V

2.5V

2.0V

This figure is a conceptual illustration of different modes of operation, not a complete circuit design.