Data Sheet

Broadcom AV02-0629EN
7
HDSP-210x/-211x/-250x Series Data Sheet Eight-Character 5 mm and 7 mm Smart Alphanumeric Displays
AC Timing Frequency Characteristics
Values over temperature range –45°C to +85°C. 4.5V < V
DD
< 5.5V, unless otherwise specified.
Figure 3: Write Cycle Timing Diagram
c. Changing the logic levels of the Address lines when CE = 0 may cause erroneous data to be entered into the Character RAM, regardless of
the logic levels of the WR
and RD lines.
d. The display must not be accessed until after three clock pulses (110 µs min. using the internal refresh clock) after the rising edge of the reset
line.
Symbol Description 25°C (Typ.) Min.
a
a. Worst-case values occur at an IC junction temperature of 150°C.
Unit
F
OSC
Oscillator Frequency 57 28 kHz
F
RF
b
b. F
RF
= F
OSC
/224.
Display Refresh Rate 256 128 Hz
F
FL
c
c. F
FL
= F
OSC
/28,672.
Character Flash Rate 2 1 Hz
t
ST
d
d. t
ST
= 262,144/F
OSC
.
Self Test Cycle Time 4.6 9.2 sec.
1
9
8
6
32
CE
7
10
4 2
5
A
0
-A
4
FL
D
0
-D
7
WR
Input Pulse Levels: 0.6V to 2.4V