HD-4702_06 Datasheet, PDF (2/8 Pages) Intersil Corporation – CMOS Programmable Bit Rate Generator

HD-4702
Pin Description
PIN NUMBER
TYPE
16
8
5
I
4
I
7
I
6
O
15
I
11, 12, 13, 14
I
9
O
1, 2, 3
O
10
O
SYMBOL
V_CC
GND
CP
E_CP
I_X
O_X
I_M
S0 - S3
CO
Q₀ - Q₂
Z
DESCRIPTION
V_CC: Is the +5V power supply pin. A 0.1μF capacitor between pins 16 and 8 is
recommended for decoupling.
GROUND
EXTERNAL CLOCK INPUT
EXTERNAL CLOCK ENABLE: A low signal on this input allows the baud rate to be
generated from the CP input.
CRYSTAL INPUT
CRYSTAL DRIVE OUTPUT
MULTIPLEXED INPUT
BAUD RATE SELECT INPUTS
CLOCK OUTPUT
SCAN COUNTER OUTPUTS
BIT RATE OUTPUT
CLOCK MODES AND INITIALIZATION
IX
E_CP
CP
OPERATION
H
L
Clocked from I_X
X
L
Clocked from CP
X
H
H
Continuous Reset
X
L
Reset During 1st CP = High
Time
H = HIGH Level
L = LOW Level
X = Don’t Care
= Clock Pulse
= 1st HIGH Level Clock Pulse after E_CP goes LOW
NOTE: Actual output frequency is 16 times the indicated Output
Rate, assuming a clock frequency of 2.4576MHz.
2
FN2954.2
August 24, 2006