Peripheral Simulation

For Dallas Semiconductor DS89C420 — Stretch Cycle Support

Simulation support for this peripheral or feature is comprised of:

• Accurate simulation of special on-chip features.

These simulation capabilities are described below.

Stretch MOVX Cycle

The feature allows the programmer to adjust the speed of external memory accesses by adding machine cycles the MOVX instruction. Increasing machine cycles lengthens the RD and WR strobe signals for each MOVX instruction executed, thereby allowing access to slower memory or peripherals. The Stretch MOVX Cycle setting affects the speed of the MOVX instruction only.