ICM7244_14 Datasheet, PDF (5/13 Pages) Intersil Corporation – 8-Character, Microprocessor Compatible,LED Display Decoder Driver

Timing Waveforms
WR
CLEAR
ICM7244
CS
t_CS
ADDRESS
WRITE
DATA
t_AH
t_AS
VALID
t_WC
t_WPI
t_WHP
t_DS
t_T
t_T
t_DH
VALID
FIGURE 1. RANDOM ACCESS TIMING
CHAR
1
t_SEN
CHAR
2
CHAR
8
t_WPH
SEN
DISPLAY FULL
t_WDF
INTERNAL
INTER-CHARACTER
BLANKING
SIGNAL
CHAR 1
CHAR 2
CHAR 3
CHARACTERS
DRIVE
SIGNALS
CHAR 4
CHAR 5
CHAR 6
CHAR 7
CHAR 8
FIGURE 2. SEQUENTIAL ACCESS MODE TIMING (MODE = 1)
~5µs
~300µs
INTER-CHARACTER BLANKING
FIGURE 3. DISPLAY CHARACTERS MULTIPLEX TIMING DIAGRAM
5
FN6675.1
January 22, 2009