ICM7244 INTERSIL [Intersil Corporation], ICM7244 Datasheet - Page 6

• Manufacturer Part Number: ICM7244
• Description: 8-Character, Microprocessor Compatible, 8-Character, Microprocessor Compatible,
• Manufacturer: INTERSIL [Intersil Corporation]

Pin Descriptions
SEG i, SEG b, SEG
SEG d1, SEG a1,
SEG j, SEG h, DP,
SEG g1, SEG k,
SEG m, SEG e,
SEG d2, SEG f,
A2/DISP FULL
CHAR8 thru
CHAR4 thru
OSC/OFF
g2, SEG I,
SIGNAL
SEG a2,
CHAR5,
CHAR2,
A0/SEN
D0 - D5
A1/CLR
CHAR1
MODE
SEG c
WR
CS
14 thru 17,
19 thru 21,
30 thru 38
40 thru 44
1 thru 3,
4 thru 9
PIN
10
13
29
28
27
26
25
24
6
6-Bit ASCll Data input pins (active high).
Chip Select from µP address decoder, etc.
WRite pulse input pin (active low). For an active high write pulse, CS can be used.
Selects data entry MODE. High selects Sequential Access (SA) mode where first entry is displayed
in “leftmost” character and subsequent entries appear to the “right”. Low selects the Random
Access (RA) mode where data is displayed on the character addressed via A0 thru A2 Address pins.
In RA mode it is the LSB of the character Address. In SA mode it is used for cascading devices for
displays of more than 8 characters (active high enables device controller).
In RA mode this is the second bit of the address. In SA mode, a low input will CLeaR the Serial
Address Counter, the Data Memory and the display.
In RA mode this is the MSB of the Address. In SA mode, the output goes high after 8 entries,
indicating DISPlay FULL.
OSCillator input pin. Adding capacitance to V
oscillator can be applied to this pin. A low at this input sets the device into a (shutdown) mode, shutting
OFF the display and oscillator but retaining data stored in memory.
SEGment driver outputs.
CHARacter driver outputs.
ICM7244
ICM7244
DD
FUNCTION
will lower the internal oscillator frequency. An external
January 22, 2009
FN6675.1