ICM7228CIBI View Datasheet(PDF) - Renesas Electronics
Part Name
Description
Manufacturer
ICM7228CIBI Datasheet PDF : 19 Pages
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ICM7228
Timing Diagrams
MODE
WRITE
INPUT
DATA
tMS
tMH
tWL
tWH
tDS
tDH
VALID
FIGURE 1. ICM7228A/B WRITE CYCLE
MODE
WRITE
(D1)
CONTROL WORD
WRITE DATA
8 PULSES
TYPE OF DECODER?ID6
DECODE/NO DECODE? ID5
SHUTDOWN?ID4
DATA COMING ID7
(D8) DON’T CARE
CONTROL WORD
TYPE OF DECODER?ID6
DECODE/NO DECODE? ID5
SHUTDOWN? ID4
DATA COMING ID7
FIGURE 2. ICM7228A/B SEQUENTIAL 8-DIGIT RAM UPDATE
DIGIT
ADDRESS
DAO-DAZ
WRITE
DATA
VALID
tAS
tWL
tDS
tAH
tWH
tDH
VALID DATA
FIGURE 3. ICM7228C WRITE CYCLE
INTERDIGIT BLANKING
INTERNAL SIGNAL
D2
D5
D1
D7
TYPICAL DIGITS D8
OUTPUT PULSES D6
D4
D3
10s (TYP)
FREE RUNNING
320s (TYP)
FREE RUNNING (PER DIGIT)
INTERDIGIT BLANKING
FIGURE 4. DISPLAY DIGITS MULTIPLEX (COMMON ANODE DISPLAY)
FN3160 Rev 9.00
August 19, 2015
Page 7 of 19
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