Syntill8 licenses Mentor Graphics' M8051 family of microcontroller cores. All the cores in the product range are compatible with the Intel 8051 architecture. They are implemented as soft cores, ready for integration into customers' SoC products.
CHOICE OF ARCHITECTURES
We offer two types of 8051 design: the M8051 and M8052 are designed to provide precise compatibility with discrete Intel devices, whereas the M8051W and M8051EW offer enhanced speed and reduced power consumption, together with usability extensions.
The current portfolio is differentiated according to our perception of customer demand. At one end of the range the M8051 sets pin-for-pin and clock-for-clock compatibility with the original Intel devices as its highest design requirement. At the other end of the scale Syntill8 has designed the M8051W and M8051EW to provide a fast, low-power solution that remains memory-cycle compatible with Intel's 87C51. An overriding design goal has been to produce the best performing true 8-bit designs, which use only 8-bit components and memory resources.
| Design | M8051 | M8052 | M8051W | M8051EW |
|---|---|---|---|---|
| Clocks per Machine Cycle | 12 | 12 | 2 | 2 |
| External Address Space | 0-64k | 0-64k | 0-1M | 0-1M |
| Internal Data Memory | 0-256 | 0-256 | 0-256 | 0-256 |
| Multiplexed Externl Memory Bus | ✓ | ✓ | ✓ | ✓ |
| Wait State Support | ✓ | ✓ | ||
| Synchronous Memory Support | ✓ | ✓ | ||
| Interrupt Sources | 5 | 6 | 5-25 | 5-25 |
| Non-maskable Interrupt | ✓ | ✓ | ||
| Interrupt Levels | 2 | 2 | 3/5 | 3/5 |
| Data Pointers | 1 | 1 | 1/2/4/8 | 1/2/4/8 |
| I/O Ports | 32 | 32 | 0/32 | 0/32 |
| Timer Counters | 2 | 3 | 0/2/3 | 0/2/3 |
| Serial Port | 1 | 1 | 0/1 | 0/1 |
| Memory Banking | ✓ | ✓ | ✓ | ✓ |
| External SFR Interface | ✓ | ✓ | ✓ | ✓ |
| On-chip Debug | ✓ |
