Holtek Semiconductor HT48RB8
This device is an 8-bit high performance RISC-like microcontroller designed for USB product applications. It is particularly suitable for use in products such as mice, keyboards and joystick.FEATURES
● Operating voltage:● 4096´15 program memory ROM
● 160´8 data memory RAM
● HALT function and wake-up feature reduce power fSYS=6M/12MHz: 4.4V~5.5V
● Low voltage reset function
● 32 bidirectional I/O lines (max.)
● 8-bit programmable timer/event counter with over- consumption
● 8-level subroutine nesting
● Up to 0.33ms instruction cycle with 12MHz system flow interrupt
● 16-bit programmable timer/event counter and over- flow interrupts
● Crystal oscillator (6MHz or 12MHz)
● Watchdog Timer
● 6 channels 8-bit A/D converter
● USB1.1 low speed function
● 4 endpoints supported (endpoint 0 included) clock at VDD=5V
● Bit manipulation instruction
● 15-bit table read instruction
● 63 powerful instructions
● All instructions in one or two machine cycles
● 28-pin SOP, 48-pin SSOP package
GENERAL DESCRIPTION
A HALT feature is included to reduce power consumption. Rev. 1.30 1 February 10, 2003 HT48RB8 Block Diagram U S B D + /C L K U S B D -/D A T A V 3 3 O T M R 1 C M U X T M R 1 fS Y S...