HT82K68

Preliminary Features · · · · · · · Multimedia Keyboard Encoder OTP · · · · · · · HT82K68E Operating voltage: 2.8V~5.5V 34(42-pin)/32(40-pin) bidirectional I/O lines One 8-bit programmable timer counter with overflow interrupts Crystal or RC oscillator Watchdog Timer 3K´16 OTP EPROM 160´8 data RAM HALT function and wake-up feature reduce power consumption Six-level subroutine nesting Bit manipulation instructions 16-bit table read instructions 63 powerful instructions All instructions in 1 or 2 machine cycles 40/42-pin DIP package General Description The HT82K68E is an 8-bit high performance peripheral interface IC, designed for multiple I/O products and multimedia applications. It supports interface to a low speed PC with multimedia keyboard or wireless keyboard in Windows 95, Windows 98 or Windows 2000 environment. A HALT feature is included to reduce power consumption. The program and option PROM can be electrically programmed making the HT82K68E suitable for use in product development. 1 August 8, 2000 Preliminary Block Diagram S T A C K 0 S T A C K 1 S T A C K 2 S T A C K 3 P ro g ra m E P R O M P ro g ra m C o u n te r S T A C K 4 S T A C K 5 In te rru p t C ir c u it S Y S C L K /4 T M R T M R C HT82K68E IN T C 8 b it S Y S C L K /4 W D T M U X R C O S C In s tr u c tio n R e g is te r M P 0 M P 1 M U X D A T A M e m o ry W D T S W D T P r e s c a le r In s tr u c tio n D e c o d e r A L U T im in g G e n e ra to r M U X P E C P E S T A T U S P D C P ...