MC68HC05J3 Datasheet, PDF (15/92 Pages) Motorola, Inc – High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcomputer Unit

1
1
INTRODUCTION
The MC68HC05J3, with 2kbytes of ROM is a member of the Motorola M68HC05 family of
HCMOS 8-bit single chip microcomputers. Based on the industry-standard M68HC05 CPU core
and its familiar, efficient instruction set, this device provides a cost effective, low pin-count
microcomputer solution suitable for use in a wide variety of application areas, including car body
electronics. The keyboard interrupt function, which shares 4 I/O lines of port B, provides a simple
interface to keypads, switches and other similar input media. In addition, the port pins are capable
of sinking a current of 8mA at 0.8V and can therefore be used to drive certain LED’s.
1.1
Features
• Fully static design featuring the industry standard M68HC05 core
• On-chip oscillator with crystal, resistor, external clock or ceramic resonator connection
• 2048 bytes of User ROM
• 128 bytes of RAM
• Power saving STOP and WAIT modes
• 16-bit programmable timer with input capture and output compare functions
• 8-bit multi-purpose timer
• Real time interrupt circuit
• Computer operating properly watchdog timer (mask option)
• Interrupt request input (IRQ), plus four on-chip hardware interrupt sources
• Keyboard interrupt feature on four port B input/output lines
• One 8-bit and one 6-bit parallel I/O port (two lines on port B are shared with the 16-bit timer)
• All port pins are capable of sinking a current of 8mA at 0.8V
• Available in 20-pin plastic SOIC and 20-pin plastic DIL packages
MC68HC05J3
INTRODUCTION
TPG
MOTOROLA
1-1