ICM7228 Datasheet, PDF (9/17 Pages) Intersil Corporation – 8-Digit, Microprocessor- Compatible, LED Display Decoder Driver

ICM7228
TABLE 1. ICM7228A PIN ASSIGNMENTS AND DESCRIPTIONS (Continued)
PIN NO.
NAME
FUNCTION
DESCRIPTION
15 DIGIT 1
Output LED Display Digits 1, 2, 5 and 8 Drive Lines.
16 DlGlT 2
17 DIGIT 5
18 DlGlT 8
19
V_DD
20 DIGIT 4
Supply
Output
Device Positive Power Supply Rail.
LED Display Digits 4, 7, 6 and 3 Drive Lines.
21 DlGlT 7
22 DlGlT 6
23 DIGlT 3
24 SEG f
Output LED Display Segments f, d, g and a Drive Lines.
25 SEG d
26 SEG g
27 SEG a
28
V_SS
Supply Device Ground or Negative Power Supply Rail.
PIN NO.
NAME
1
DIGIT 4
2
DlGlT 6
3
DIGIT 3
4
DlGlT 1
5
ID6,
(HEXA/CODE B)
6
ID5, (DECODE)
7
ID7,
(DATA COMING)
8
WRITE
9
MODE
10 ID4,
(SHUTDOWN)
11 ID1
12 ID0
13 ID2
TABLE 2. ICM7228B PIN ASSIGNMENTS AND DESCRIPTIONS
FUNCTION
DESCRIPTION
Output LED Display Digits 4, 6, 3 and 1 Drive Lines.
Input
Input
Input
Input
Input
Input
Input
Input
Input
When “MODE” Low: Display Data Input, Bit 7.
When “MODE” High: Control Bit, Decoding Scheme Selection: High, Hexadecimal
Decoding; Low, Code B Decoding.
When “MODE” Low: Display Data Input, Bit 6.
When “MODE” High: Control Bit, Decode/No Decode Selection: High, No Decode; Low, Decode.
When “MODE” Low: Display Data Input, Bit 8, Decimal Point Data.
When “MODE” High: Control Bit, Sequential Data Update Select: High, Data Coming; Low,
No Data Coming.
Data Input Will Be Written to Control Register or Display RAM on Rising Edge of WRITE.
Selects Data to Be Loaded to Control Register or Display RAM: High, Loads Control Reg-
ister; Low, Loads Display RAM.
When “MODE” Low: Display Data Input, Bit 5.
When “MODE” High: Control Bit, Low Power Mode Select: High, Normal Operation; Low,
Oscillator and Display Disabled.
When “MODE” Low: Display Data Input, Bit 2.
When “MODE” High and “ID7 (DATA COMING)” Low: Digit Address, Bit 2, Single Digit
Update Mode.
When “MODE” Low: Display Data Input, Bit 1.
When “MODE” High and “ID7 (DATA COMING)” Low: Digit Address, LSB, Single Digit
Update Mode.
When “MODE” Low: Display Data Input, Bit 3.
When “MODE” High and “ID7 (DATA COMING)” Low: Digit Address, MSB, Single Digit
Update Mode.
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