HD-4702 Datasheet, PDF (2/8 Pages) Intersil Corporation – CMOS Programmable Bit Rate Generator

HD-4702/883
Truth Table
TRUTH TABLE FOR RATE SELECT INPUTS
(Using 2.4576MHz Crystal)
S₃
S₂
S₁
S₀
OUTPUT RATE (Z)
L
L
L
L MUX Input (l_M)
L
L
L
H MUX Input (l_M)
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
H
H
H
H 110 Baud
NOTE:
1. 19200 Baud by connecting Q₂ to I_M.
CLOCK MODES AND INITIALIZATION
I_X
E_CP
C_P
OPERATION
H
L Clocked from I_X
X
L
Clocked from C_P
X
H
H Continuous Reset
X
L
Reset During First C_P = High Time
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
= First HIGH Level Clock Pulse after E_CP goes LOW
2