Introduction The MC68HC908JB16 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. Features Features of the MC68HC908JB16 MCU include the following: • High-performance M68HC08 architecture • Fully upward-compatible object code with M6805, M146805, and M68HC05 families • Low-power design; fully static with stop and wait modes • 6-MHz internal bus frequency • 16,384 bytes of on-chip FLASH memory with security1 feature • 384 bytes of on-chip random access memory (RAM) • Up to 21 general-purpose input/output (I/O) pins, including: – 15 shared-function I/O pins – 8-bit keyboard interrupt port – 10mA high current drive for PS/2 connection on 2 pins (with USB module disabled) – 1 dedicated I/O pin, with 25mA direct drive for infrared LED (32-pin package) – 6 dedicated I/O pins, with 25mA direct drive for infrared LED on 2 pins and 10mA direct drive for normal LED on 4 pins (28-pin package) • Two 16-bit, 2-channel timer interface modules (TIM1 and TIM2) with selectable input capture, output compare, PWM capability on each channel, and external clock input option (TCLK) • Universal Serial Bus specification 2.0 low-speed functions: – 1.5Mbps 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 • Serial communications interface module (SCI) • Dual clock generator modules (CGM) (32-pin package) • In-circuit programming capability using USB communication or standard serial link on PTA0 pin • 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 • Master reset pin with internal pull-up and power-on reset • IRQ interrupt pin with internal pull-up and schmitt-trigger input • 32-pin low-profile quad flat pack (LQFP) and 28-pin small outline integrated circuit package (SOIC)
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