Peripheral Simulation

For Atmel AT89C5131 — X2 mode for CPU and each peripheral with PLL

Simulation support for this peripheral or feature is comprised of:

• Accurate simulation of special on-chip features.

These simulation capabilities are described below.

6/12 Clocks per Machine Cycle

This device can run in either 6 or 12 clocks per machine cycle. Enabling 6 clocks per cycle mode allows equivalent processing speed at half the clock frequency. This clock double feature doubles only the internal system clock and the clock used to access internal flash memory, so access to external memory and external peripherals could be affected when it is enabled.