GENERAL DESCRIPTION
The MC68HC705JB2 is a member of the low-cost, high-performance MC68HC05
Family of 8-bit microcontroller units (MCUs). The MC68HC05 Family is based on
the Customer-Specified Integrated Circuit (CSIC) design strategy. All MCUs in the
family use the popular MC68HC05 central processing unit (CPU) and are
available with a variety of subsystems, memory sizes and types, and package
types. The MC68HC705JB2 is specifically designed to be used in applications
where a Universal Serial Bus (USB) interface is required.

FEATURES
• Industry standard M68HC05 CPU core
• Memory-mapped Input/Output (I/O) registers
• 2048 Bytes of user EPROM
• 128 Bytes of user RAM
• Fully compliant Low Speed USB with 3 Endpoints:
– 1 Control Endpoint (2 x 8-byte buffer)
– 2 Interrupt Endpoints (1 x 8-byte buffer shared)
• 3.3Volt dc output pin for USB pullup resistors
• Multi-Function Timer
• 16-Bit Input Capture/Output Compare Timer
• 11 Bidirectional I/O pins with the following features:
– 9 I/Os have software programmable pull-down capability
– 2 open-drain I/Os have software programmable pull-up, 25mA current
sink capability
– 4 I/Os with external interrupt capability
• Low Voltage Reset (LVR) circuit
• Power saving STOP and WAIT Modes
• Available in 20-Pin PDIP and 20-pin SOIC packages