GENERAL DESCRIPTION

The MC68HC05JB4 is a member of the low-cost, high-performance M68HC05 Family of 8-bit microcontroller units (MCUs). The M68HC05 Family is based on the customer-specified integrated circuit (CSIC) design strategy. All MCUs in the family use the popular M68HC05 central processing unit (CPU) and are available with a variety of subsystems, memory sizes and types, and package types.

The MC68HC05JB4 is specifically designed to be used in applications where a low speed (1.5Mbps) Universal Serial Bus (USB) interface is required.

FEATURES

• Industry standard M68HC05 CPU core

• Memory-mapped input/output (I/O) registers

• 3584 Bytes of user ROM

• 176 Bytes of user RAM (includes 64 byte stack)

• 19 Bidirectional I/O pins with the following added features:

– PA[0:7]: Software enable Internal pull-up resistor (50kΩ typical)

– PA[0:3]: Built-in schmitt triggered input level

– Maskable as extra input sources for IRQ interrupt

– Maskable Negative-Edge Only or Negative-Edge

– and Low-Level Interrupt Capability

– PA4: IRQ2 with built-in schmitt triggered input

– PA[5:7]: 10mA Sink output drive

– PA[6:7]: Maskable 10mA/25mA sink output drive

– Software enable Slow Edge Pull Down Devices

– PB[0:4]: Software enable Internal pull-up resistor (50kΩ typical)

– Software enable Slow Edge Pull Down Devices

– PB[0]: ICAP1 with built-in schmitt triggered input

– PB[3:4]: AD[4:5]

– PC[0:3]: AD[0:3]

• Fully compliant to Low Speed USB with 3 Endpoints:

– 1 Control Endpoint (2x8 byte buffer)

– 2 Interrupt Endpoints (1x8 byte buffer shared)

• 6-channel 8-bit Analog-to-Digital Converter (ADC)

• Multi-function Timer (MFT)

• 16-bit Timer with 1 input capture and 1 output compare

• Low Voltage Reset (LVR) Circuit

• Computer Operating Properly (COP) Watchdog Reset

• Provide a 3.3V ±10 DC Voltage for USB pull-up resistor

• Fully Static Operation with no Minimum Clock Speed

• Illegal Address Reset

• Power-Saving STOP and WAIT Modes

• Available in 28-Pin PDIP and 28-Pin SOIC packages

MASK OPTIONS

The following mask options are available:

• Enable PA0 to PA3 as extra IRQ interrupt sources.

• External interrupt pins (IRQ, PA0 to PA3): negative edge-triggered or negative edge- and low level-triggered.

• High current (25mA) output on PA6 and PA7.

• OSC: crystal/ceramic resonator start up delay, 4064 or 128 clock cycles.

• LVR: enabled or disabled.

• COP: enabled or disabled.