The MC68HC908JB8 is a member of the low-cost, high-performance M68HC08 Family of 8-bit microcontroller units (MCUs). The M68HC08 Family is based on the customer-specified integrated circuit (CSIC) design strategy. 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 direct drive for normal LED on 4 pins

– 25mA direct drive for infrared LED on 2 pins

– 10mA high current drive 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