GENERAL DESCRIPTION
This control board accepts input data from a parallel or serial RS232 data interface and provides the logic and drive functions to operate several B-G Instruments' print mechanisms, including model numbers PM 1224, PM 1320 and PM 1416 . The board is based on an 80C552 microprocessor with a complement of other CMOS chips. It also provides 10-bit analog-to-digital conversion of up to 8 analog voltage inputs, a keypad interface, a number of other I/O lines, a paper takeup reel driver and an optional battery-backed clock/calendar. This board is primarily intended for applications that require its analog input capability. Applications that just need digital input can use the CB1224, CB1320 or the CB1416 control board.

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