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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

? IRQinterrupt 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)