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参数资料
| 型号： | ICM7228BIBI |
| 厂商： | Intersil |
| 文件页数： | 12/18页 |
| 文件大小： | 0K |
| 描述： | IC LED DISPLAY DRVR 8DGT 28-SOIC |
| 标准包装： | 260 |
| 显示器类型： | LED |
| 配置： | 7 段显示 |
| 数字或字符： | 8 位数字 |
| 电流 - 电源： | 250µA |
| 电源电压： | 4 V ~ 6 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 28-SOIC W |
| 包装： | 管件 |
ICM7228
Display Formats
TABLE 5. DISPLAY CHARACTER SETS (Continued)
The ICM7228A and ICM7228B have three possible display
INPUT DATA CODE
DISPLAY CHARACTERS
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.
TABLE 5. DISPLAY CHARACTER SETS
ID3
0
0
0
0
0
1
1
ID2
0
1
1
1
1
0
0
ID1
1
0
0
1
1
0
0
ID0
1
0
1
0
1
0
1
HEXADECIMAL
3
4
5
6
7
8
9
CODE B
3
4
5
6
7
8
9
INPUT DATA CODE
DISPLAY CHARACTERS
1
0
1
0
A
-
ID3
0
0
0
ID2
0
0
0
ID1
0
0
1
ID0
0
1
0
HEXADECIMAL
0
1
2
CODE B
0
1
2
1
1
1
1
0
1
1
1
1
0
0
1
1
0
1
0
b
C
d
E
E
H
L
P
1
1
1
1
F
(Blank)
DATA BUS D0 - D7
5
I/O OR
MEMORY
WRITE PULSE
DECODER
ENABLE
DEVICE SELECT
AND
ID0 - ID3
AND ID7
INTERSIL
ICM7228C
SEGMENTS
LED DISPLAY
ADDRESS
DECODER
WRITE PULSE
WRITE
DRIVE
A3 - A15
A0 - A2
DA0 - DA2
DIGITS
DRIVE
ADDRESS BUS A0 - A15
FIGURE 10. ICM7228C MICROPROCESSOR SYSTEM INTERFACING
f
a
g
b
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.
e
d
c
DP
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.
FIGURE 11. DIGITS SEGMENT ASSIGNMENTS
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.
TABLE 6. NO DECODE SEGMENT LOCATIONS
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
DATA
INPUT
Controlled
Segment
ID7
Decimal
Point
ID6
a
ID5
b
ID4
c
ID3
e
ID2
g
ID1
f
ID0
d
When shutdown, the ICM7228 enters a low power standby
mode typically consuming only 1 μ A of supply current for the
ICM7228A/B and 2.5 μ A 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
12
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