ICM7228 Datasheet, PDF (3/17 Pages) Intersil Corporation – 8-Digit, Microprocessor- Compatible, LED Display Decoder Driver

Functional Block Diagram
ICM7228
ICM7228A, ICM7228B
ID0 - ID7
INPUT
8
DATA
8
ID4 - ID7
CONTROL
INPUTS MODE
4
1
WRITE
1
DECODE
HEXA/CODE B
CONTROL
LOGIC
SHUTDOWN
1
1
1
1
8-BYTE
STATIC
RAM
7
4
8
WRITE ADDRESS
COUNTER
8
1
8
READ
ADDRESS, DIGIT
MULTIPLEXER
HEXADECIMAL/
CODE B
7
DECODER
7
1
3
MULTIPLEX
OSCILLATOR
DECODE
NO-DECODE
8
7
DECIMAL
POINT
1
INTERDIGIT
BLANKING
8 SEGMENT
DRIVERS
8 DIGIT
DRIVERS
ICM7228C, ICM7228D
HEXADECIMAL/
CODE B/
SHUTDOWN
1
ID0 - ID3
DA0 - DA2
ID7
DIGIT
DATA INPUT _WRITE ADDRESS
5
1
3
THREE LEVEL
1
INPUT LOGIC
SHUTDOWN
8
WRITE ADDRESS
8-BYTE
COUNTER
1
STATIC
RAM
8
4
HEXADECIMAL/
CODE B
DECODER
1
8
READ
ADDRESS
MULTIPLEXER
5
MULTIPLEX
OSCILLATOR
8
7
DECIMAL
POINT
1
INTERDIGIT
BLANKING
8 SEGMENT
DRIVERS
8 DIGIT
DRIVERS
9-19