Hobbies And Interests
PIC 16C5X/XX
Microchip Technology makes the PIC 16C5X/XX family of 8-bit microcontroller chips. They have a maximum clock speed of 40 MHz, but can run at lower speeds to save energy. Depending on the device, they have from 512 to 2K bytes of read-only memory, and 25 to 73 bytes of RAM. They have an 8-bit real-time counter, programmable sleep mode and watchdog timer. Current consumption varies from 15 microamps at 32 kHz to under two milliamps at four MHz.
8051
The Intel 8051 is an 8-bit microcontroller family. Its ROM ranges from none to 8K, and has 128 or 256 bytes of RAM depending on the specific part number. They run at clock speeds up to 12 MHz. Two of the devices use EPROM, in which ultraviolet light erases data and a special electrical programmer writes new data. They have four bidirectional input-output ports of eight bits each for a total of 32 I/O lines.
68HC11
Motorola̵7;s 68HC11 is another 8-bit microcontroller family. The 68HC11s use either UV-erasable or electrically-erasable memory for permanent storage. Different models in the family have between zero and 768 bytes of RAM. Clock speeds range up to three MHz, and the chips draw up to 27 milliamps of current at two MHz. These microcontrollers feature eight 8-bit analog-to-digital converters for monitoring analog signals in real time.
TI ARM Stellaris
The Texas Instruments ARM Stellaris LM4F is a microcontroller combining 16- and 32-bit features. It uses several kinds of memory, including 2K bytes of electrically-erasable ROM, 256K of flash, up to 32K of RAM and a factory-programmed ROM containing software libraries. The microcontroller runs at clock speeds up to 80 MHz. It supports Universal Serial Bus 2.0 as well as RS-232 data communications. It has several power settings, including a standby mode that consumes 1.6 microamps of current.