ICM7228AIBIZ Intersil, ICM7228AIBIZ Datasheet - Page 12

• Manufacturer Part Number: ICM7228AIBIZ
• Description: IC DRIVER DECODER 8DGT CA 28SOIC
• Manufacturer: Intersil

Specifications of ICM7228AIBIZ

• Display Type: LED
• Configuration: 7 Segment
• Digits Or Characters: 8 Digits
• Current - Supply: 200µA
• Voltage - Supply: 4 V ~ 6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Interface: -

Display Formats
The ICM7228A and ICM7228B have three possible display
formats; Hexadecimal, Code B and No Decode. Table 5
shows the character sets for the decode modes and their
corresponding input code.
The display formats of the ICM7228A/B are selected by
writing data to bits ID4, ID5 and ID6 of the Control Register
(See Table 1 and 2 for input Definitions). Hexadecimal and
Code B data is entered via ID0-lD3 and ID7 controls the
decimal point.
The No Decode mode of the ICM7228A and ICM7228B
allows the direct segment-by-segment control of all 64
segments driven by the device. In the No Decode mode, the
input data directly control the outputs as shown in Table 6.
Controlled
INPUT DATA CODE
Segment
ID3
0
0
0
INPUT
DATA
TABLE 6. NO DECODE SEGMENT LOCATIONS
FIGURE 11. DIGITS SEGMENT ASSIGNMENTS
ID2
0
0
0
TABLE 5. DISPLAY CHARACTER SETS
I/O OR
MEMORY
WRITE PULSE
Decimal
Point
ID7
ID1
0
0
1
A3 - A15
ID6
e
ID0
a
f
0
1
0
d
g
a
12
ID5
DISPLAY CHARACTERS
c
b
b
HEXADECIMAL
DECODER
ENABLE
FIGURE 10. ICM7228C MICROPROCESSOR SYSTEM INTERFACING
DP
ID4
ADDRESS BUS A0 - A15
c
DECODER
ADDRESS
DATA BUS D0 - D7
0
1
2
ID3
e
ID2
g
CODE B
ID1
f
DEVICE SELECT
WRITE PULSE
0
1
2
ID0
d
AND
ICM7228
A0 - A2
5
An input high level turns on the respective segment, except
for the decimal point, which is turned on by an input low level
on ID7.
The No Decode mode can be used in different applications
such as bar graph or status panel driving where each
segment controls an individual LED.
The ICM7228C has only the Hexadecimal and Code B
character sets. The HEXA/CODE B/SHUTDOWN input, pin
9, requires a three level input. Pin 9 selects the Hexadecimal
format when pulled high, the Code B format when floating or
driven to mid-supply, and the shutdown mode when pulled
low (See Table 3). Table 5 also applies to the ICM7228C.
Shutdown and Display Banking
When shutdown, the ICM7228 enters a low power standby
mode typically consuming only 1µA of supply current for the
ICM7228A/B and 2.5µA for the ICM7228C. In this mode the
ICM7228 turns off the multiplex scan oscillator as well as the
digit and segment drivers. However, input data can still be
ID0 - ID3
AND ID7
WRITE
DA0 - DA2
INPUT DATA CODE
ID3
0
0
0
0
0
1
1
1
1
1
1
1
1
ICM7228C
INTERSIL
TABLE 5. DISPLAY CHARACTER SETS (Continued)
SEGMENTS
ID2
0
1
1
1
1
0
0
0
0
1
1
1
1
DIGITS
DRIVE
DRIVE
ID1
1
0
0
1
1
0
0
1
1
0
0
1
1
ID0
1
0
1
0
1
0
1
0
1
0
1
0
1
DISPLAY CHARACTERS
HEXADECIMAL
LED DISPLAY
A
C
E
F
3
4
5
6
7
8
9
b
d
CODE B
(Blank)
H
3
4
5
6
7
8
9
E
L
P
-