AY-5-2376

www.DataSheet4U.com KEYBOARD and ENCODER 219 W. Rhapsody, San Antonio, Texas 78216 1 KBD-5 KEYBOARD General Description The KBD-5 keyboard and ASCII encoder utilizes a single MOS integrated circuit to perform the bulk of all necessary operations to generate full 8 bit parallel ASCII output code complete with a parity bit for error detection. Debounce is internal and automatic and choice between positive or negative keypressed output strobe is provided. The keyboard can be programmed for upper case characters only, or upper and lower case characters. The KBD-5 has the features of n key lockout and 2 key rollover to help in reducing typing errors. Once a key is pressed pressing other keys will have no effect until the first key is released. The KBD-5 is already programmed for the control functions LINE FEED, RETURN and ESCAPE and can easily be programmed for other control www.DataSheet4U.com functions. The keyboard also has two SPST locking keyswitches which can be used for turning the RECEIVE, TRANSMIT and ECHO functions of a terminal such as the CT-1024 on and off. The keyboard also has an automatic repeat function which causes a string of characters to be transmitted after a key has been depressed for more than about 0.5 seconds. Assembling your Keyboard and ASCII Encoder NOTE: MOS integrated circuits are susceptible to damage by static electricity. Although some degree of protection is provided internally within the integrated circuits, their cost demands the utmost in ...