Members: Jackson Chan, Hau In Chan

We have tried to search for the information of the Buffalo compiler for the MC68HC11E9 microcontroller chip. But we couldn’t find anything about it, and we couldn’t contact the other members including the group leader of the group. Therefore, we decided to write about more of the details of the microcontroller chips that we are using.

The MC68HC11E9 Chip
The MC68HC11E9 high-density complementary semiconductor(HCMOS) high- performance microcontroller unit(MCU) includes the following features: 12 Kbytes of ROM, 512 bytes of EEPROM, and 512 bytes of RAM. The MC68HC11E9 is a high-speed, low-power chip with a multiplexed bus capable of running at up to 3 MHz. Its fully static design allows it to operate at frequencies down to dc.

Some of the Features are:

• M68HC11 CPU.
• Power Saving STOP and WAIT Modes.
• 12 Kbytes of On-Chip ROM.
• 512 Bytes of On-Chip EEPROM with Block Protect for Extra Security.
• 512 Bytes of On-Chip RAM.
• 8-Bit Pulse Accumulator.
• Real-Time Interrupt Circuit.
• Synchronous Serial Peripheral Interface(SPI).
• Asynchronous Nonreturn to Zero (NRZ) Serial Communications Interface(SCI).
• 8-Channel 8-Bit Analog-to-Digital (A/D) Converter.
• 38 General-Purpose Input/Output (I/O) Pins.
• 16 Bidirectional I/O Pins.
• 11 Input-Only Pins, 11 Output-Only Pins.

The structure of the MC68HC11E9 MCU is shown below: