2

Truth Table

TRUTH TABLE FOR RATE SELECT INPUTS

(Using 2.4576MHz Crystal)

OUTPUT RATE (Z)

LLLL

L

L

L

H

L

L

H

L

50 Baud

L

L

H

H

75 Baud

L

H

L

L

134.5 Baud

L

H

L

H

200 Baud

L

H

H

L

600 Baud

L

H

H

H

2400 Baud

H

L

L

L

9600 Baud

H

L

L

H

4800 Baud

H

L

H

L

1800 Baud

H

L

H

H

1200 Baud

H

H

L

L

2400 Baud

H

H

L

H

300 Baud

H

H

H

L

150 Baud

HHHH

110 Baud

NOTE:

CLOCK MODES AND INITIALIZATION

OPERATION

H

L

X

L

X

H

H

Continuous Reset

X

L

NOTE:

2. Actual output frequency is 16 times the indicated output

rate, assuming a clock frequency of 2.4576MHz.

H

= HIGH Level

L

= LOW Level

X

= Don’t Care

= Clock Pulse

HD-4702/883