HT45R34 Datasheet | Holtek Semiconductor

Features .. - Operating voltage: f SYS=4MHz: 2.2V~5.5V f SYS=8MHz: 3.3V~5.5V - 8 bidirectional I/O lines - Two external interrupt inputs shared with I/O lines - 8-bit programmable timer/event counter with - Power Down and Wake-up function reduce power consumption - Up to 0.5ms instruction cycle with 8MHz system clock at VDD=5V - All instructions executed in one or two machine cycles - 14-bit table read instruction - Four-level subroutine nesting - Bit manipulation instruction - 63 powerful instructions - Low voltage reset function - 20-pin DIP/SOP packages overflow interrupt and 7-stage prescaler - External RC oscillation converter - On-chip crystal and RC oscillator - Watchdog Timer - Multi-pin capacitor/resistor sensor input - 1024´14 program memory - 88´8 data memory RAM 24-pin SKDIP/SOP packages General Description The HT45R34 is an 8-bit high performance, RISC architecture microcontroller device specifically designed for cost-effective multiple I/O control product applications. The advantages of low power consumption, I/O flexibility, timer functions, oscillator options, Power Down and wake-up functions, Watchdog Timer, enhance the versatility of these devices to suit a wide range of application possibilities such as industrial control, consumer products, subsystem controllers, etc. Rev. 1.20 October 15, 2007 Block Diagram P A 0 /IN T 0 P A 1 /IN T 1 In te rru p t C ir c u it IN T C S T A C K 0 P ro g ra m R O M P ro g ra m C o u n te r S T A C K 1 T M R C T M R M U X P r e s c a le r P A 2 /T M R S y s te m C lo c k .. In s tr u c tio n R e g is te r D a ta M e m o ry W D T P r e s c a le r S y s te m X R...