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8051
68HC11
68H908
68332
80C196
68HC11 Based SBC
Specifications
68HC11F1 MPU with 16 MHz Clock 31.5K Bytes EPROM, 28K Bytes SRAM 88C681 DUART Chip with 2 Serial and 15 Digital I/O RS-232 Buffering on CPU UART and Serial A of DUART Up to 24 Digital I/O lines from 68HC11F1 8-Channel, 8-Bit ADC on 68HC11F1 Optional
AC-332 Analog Daughterboard Optional
DIGI-DAC Motion Control Daughterboard Optional 8K EEPROM Optional DS1286 Calendar/Clock Chip All I.C.'s are socketed, including CPU Processor Supervisory Circuit with Reset Switch Optional
CB-11 BASIC Interpreter EPROMThe MP-11 is a single board computer based on the 68HC11F1 microcontroller. A number of features distinguish the MP-11 from other 68HC11 based cards. These include 16 MHz operation, multilayer board with internal power and ground planes for noise reduction, processor supervisory circuit, optional calendar/clock chip, optional 8K EEPROM, and optional analog and motion control daughterboards.
The MP-11 measures 4.5 by 5.5 inches. Resources on the card can be considered as five separate subsections: 68HC11F1 microcontroller, memory section, processor supervisory circuit, 88C681 DUART, and daughterboard expansion connector.
Memory
The board supports up to 32K bytes of EPROM and 28K bytes of SRAM. An optional 8K EEPROM is supported on the MP-11.
Digital and Serial I/O
Up to three 8-bit parallel ports are available on the 68HC11F1, depending on resource usage. In addition, the 88C681 provides one 8-bit output port and one 7-bit input port. Three UARTs are available on the board. Two of these are RS-232C buffered and brought out on header connectors.
Optional Daughterboards
Currently, two optional daughterboards are available. The AC-332 analog daughterboard provides 4 channels of 12-bit A/D conversion and 2 channels of 12-bit D/A conversion. The DIGI-DAC motion control daughterboard provides 6 channels of 12-bit D/A conversion, and 24 digital I/O lines.
Connectors
The following CPU lines are brought out on a 2 by 20 pin header connector: Ports A, D, E, and lines PG0 through PG3 or Port G. The CPU's UART is RS-232C buffered and brought out on a 2 by 5 pin header. Serial Port A of the 88C681 is RS-232 buffered and brought out on a 2 by 5 header. The two parallel ports of the 88C681 and its serial port B lines are brought out ( unbuffered ) to a 2 by 10 pin header. A 2 by 20 pin header is available for adding custom user circuitry or as a connection point for the optional daughterboards.
A/D Converter
The 68HC11F1 provides 8 channels of 8-bit A/D conversion.
Power Requirements
The MP-11 requires +5 Volts ( regulated ) at 200 ma ( maximum ).
| MP-11 Assembled and Tested | $249 |
| 28C64 8K EEPROM | $20 |
| DS1286 Calendar/Clock Chip | $30 |
| AC-332 Analog Daughterboard | $249 |
| DIGI-DAC Motion Control Daughterboard | $210 |
| CB-11 BASIC Interpreter EPROM | $49 |
Last Updated on 1/5/2008
