The ICM7245 is an 8-character, alphanumeric display driver
and controller which provides all the circuitry required to
interface a microprocessor or digital system to a 16-segment
display with internal pull-up resistors. It is primarily intended
for use in microprocessor systems, where it minimizes
hardware and software overhead. Incorporated on-chip are a
64-character ASClI decoder, 8x6 memory, high power
character and segment drivers, and the multiplex scan
circuitry.
6-bit ASCll data to be displayed is written into the memory
directly from the microprocessor data bus. Data location
depends upon the selection of either Sequential (MODE = 1) or
Random access mode (MODE = 0). In the Sequential Access
mode the first entry is stored in the lowest location and
displayed in the “left-most” character position. Each
subsequent entry is automatically stored in the next higher
location and displayed to the immediate “right” of the previous
entry. A DISPlay FULL signal is provided after 8 entries; this
signal can be used for cascading devices together. A CLR pin is
provided to clear the memory and reset the location counter.
The Random Access mode allows the processor to select the
memory address and display digit for each input word.
The character multiplex scan runs whenever data is not being
entered. It scans the memory and CHARacter drivers, and
ensures that the decoding from memory to display is done in
the proper sequence. Intercharacter blanking is provided to
avoid display ghosting.

Features
• Single supply +3.3V operation
• 16-Segment fonts with decimal point
• Up to 8 character display driver
• Has internal pull-up resistors of 136Ω Typical
• Microprocessor compatible
• Directly drives LED common cathode displays
• Cascadable without additional hardware
• Standby feature turns display off; puts chip in low power
mode
• Sequential entry or random entry of data into display
• Character and segment drivers, All MUX scan circuitry, 8x6
static memory and 64-character ASCll font generator
included on-chip
• Pb-free (RoHS compliant)