Comparison
of Mini51 and SBC51
|
|
Mini51 |
SBC51 |
|
Product Category |
Evaluation Board |
Single Board Computer |
|
Processor Options |
P89C51RD2 P89C668 P89C669 DS89C420 ADuC831 |
Board is designed to host almost any 8051 family processor.
Available with 4 processor options: AT89C52, P89C51RD2, P89C669, DS89C450 |
|
External Memory Interface |
No |
Yes (P2, P0 ports used as addr/data) |
|
Code memory options |
On-chip 64K / 96K / 62K |
On-chip or on-board 64K / 96K |
|
In System Programmability of code memory |
Yes |
Yes |
|
External Data Memory |
On-chip XRAM 768 / 7936 / 2048 / 1024 bytes |
On-chip XRAM: SBC51-A: none SBC51-P: 768 bytes SBC51-P9: 768 bytes SBC51-U: 1024 bytes External Data Memory: 124 Kbytes, organized as 2
banks of 62KB each (SBC51-A, SBC51-P, SBC51-U) External Data Memory: 128KBytes continuous (possible due to MX architecture). |
|
Display interface |
For Text LCD module, port pins driven. |
For Text LCD module, memory mapped. LCD can be physically mounted on the SBC51 board. Graphics LCD can be easily interfaced on the
address-data bus. |
|
Keyboard interface |
For 5X5 matrix |
For PS/2 keyboard |
|
Serial interface |
One RS232 port |
One RS232 port (all models) SBC51-P9 and SBC51-U: One extra serial port (TTL /
RS232) |
|
Parallel printer interface |
No |
Yes |
|
Port pins |
Available on connectors |
Available on connectors, but P2,P0 pins used as
address/data bus. |
|
Non-volatile storage |
I2C Compatible 64K EEPROM |
I2C Compatible 64K EEPROM |
|
Real Time Clock |
I2C Compatible, With battery |
I2C Compatible, With battery |
|
Applications |
Prototyping, General purpose test platform for
Small / Medium / Large / Complex applications, Training/Education |
Prototyping, General purpose test platform for
Medium / Large / Complex applications, Training/Education Very convenient for interfacing external peripherals (such as graphics LCD) on address-data bus. |