●The MC68HC908JB8 is a member of the low-cost, high-performance M68HC08 Family of 8-bit microcontroller units (MCUs). All MCUs in the family use the enhanced M68HC08 central processor unit (CPU08) and are available with a variety of modules, memory sizes and types, and package types.
●Features
●Features of the MC68HC908JB8 include:
●• High-performance M68HC08 architecture
●• Fully upward-compatible object code with M6805, M146805, and M68HC05 Families
●• 3-MHz internal bus frequency
●• 8,192 bytes of on-chip FLASH memory
●• 256 bytes of on-chip random-access memory (RAM)
●• FLASH program memory security1
●• On-chip programming firmware for use with host PC computer
●• Up to 37 general-purpose 3.3V input/output (I/O) pins, including:
●– 13 or 10 shared-function I/O pins, depending on package
●– 24, 8, or 2 dedicated I/O pins, depending on package
●– 8 keyboard interrupts on port A, on all packages
●– 10mA sink capability for normal LED on 4 pins
●– 25mA sink capability for infrared LED on 2 pins
●– 10mA sink capability for PS/2 connection on 2 pins(with USB module disabled)
●• 16-bit, 2-channel timer interface module (TIM) with selectable input capture, output compare, PWM capability on each channel, and external clock input option (TCLK)
●• Full Universal Serial Bus Specification 1.1 low-speed functions:
●– 1.5 Mbps data rate
●– On-chip 3.3V regulator
●– Endpoint 0 with 8-byte transmit buffer and 8-byte receive buffer
●– Endpoint 1 with 8-byte transmit buffer
●– Endpoint 2 with 8-byte transmit buffer and 8-byte receive buffer
●• System protection features:
●– Optional computer operating properly (COP) reset
●– Optional low-voltage detection with reset
●– Illegal opcode detection with reset
●– Illegal address detection with reset
●Features of the CPU08 include the following:
●• Enhanced HC05 programming model
●• Extensive loop control functions
●• 16 addressing modes (eight more than the HC0
●• 16-bit index register and stack pointer
●• Memory-to-memory data transfers
●• Fast 8 × 8 multiply instruction
●• Fast 16/8 divide instruction
●• Binary-coded decimal (BCD) instructions
●• Optimization for controller applications
●• Efficient C language support
Part 3D Model
