ICM7228_15 Datasheet, PDF (10/19 Pages) Intersil Corporation – 8-Digit, Microprocessor-Compatible, LED Display Decoder Driver

ICM7228
PIN NO.
8
9
NAME
WRITE
MODE
10
ID4,
(SHUTDOWN)
11
ID1
12
ID0
13
ID2
14
ID3
15
DP
16
SEG a
17
SEG b
18
SEG d
19
V_DD
20
SEG c
21
SEG e
22
SEG f
23
SEG g
24
DIGIT 8
25
DIGIT 2
26
DIGIT 5
27
DIGIT 7
28
V_SS
TABLE 2. ICM7228B PIN ASSIGNMENTS AND DESCRIPTIONS (Continued)
FUNCTION
DESCRIPTION
Input
Data Input Will Be Written to Control Register or Display RAM on Rising Edge of WRITE.
Input
Selects Data to Be Loaded to Control Register or Display RAM: High, Loads Control Register;
Low, Loads Display RAM.
Input
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.
Input
When “MODE” Low: Display Data Input, Bit 2.
When “MODE” High and “ID7 (DATA COMING)” Low: Digit Address, Bit 2, Single Digit Update
Mode.
Input
When “MODE” Low: Display Data Input, Bit 1.
When “MODE” High and “ID7 (DATA COMING)” Low: Digit Address, LSB, Single Digit Update
Mode.
Input
When “MODE” Low: Display Data Input, Bit 3.
When “MODE” High and “ID7 (DATA COMING)” Low: Digit Address, MSB, Single Digit Update
Mode.
Input
When “MODE” Low: Display Data Input, Bit 4.
When “MODE” High: RAM Bank Select (Decode Modes Only): High, RAM Bank A; Low, RAM
Bank B.
Output LED Display Decimal Point and Segments a, b, and d Drive Lines
Supply
Output
Device Positive Power Supply Rail.
LED Display Segments c, e, f and g Drive Lines.
Output LED Display Digits 8, 2, 5 and 7 Drive Lines.
Supply Device Ground or Negative Power Supply Rail.
PIN NO.
1
2
3
4
5
6
7
8
NAME
SEG c
SEG e
SEG b
DP
DA0
DA1
ID7,
(INPUT DP)
WRITE
TABLE 3. ICM7228C PIN ASSIGNMENTS AND DESCRIPTIONS
FUNCTION
DESCRIPTION
Output LED Display Segments c, e, band Decimal Point Drive Lines.
Input
Input
Input
Input
Digit Address Input, Bit 1 LSB.
Digit Address Input, Bit 2.
Display Decimal Point Data Input, Negative True.
Data Input Will Be Written to Display RAM on Rising Edge of WRITE.
10