SPRUJB6B November 2024 – May 2025 AM2612
Figure 13-135 shows an asynchronous single-read operation on an AAD-multiplexed device.
Figure 13-135 Asynchronous Single Read on an AAD-Multiplexed DeviceFor formulas to calculate timing parameters, see Section 13.3.1.5.6.1, GPMC Timing Parameters Formulas.
Table 13-215 lists the timing bit fields to set up to configure the GPMC in asynchronous single write mode.
When the GPMC generates a read access to an AAD-multiplexed device, all address bits are driven onto the address/data bus in two separate phases. The first phase is used for the MSB address and is qualified with nOE driven low. The first address phase ends at the first nOE deassertion time. The second phase for LSB address is qualified with nOE driven high. The second address phase ends at the second nOE assertion time, when the DIR signal goes from OUT to IN.
The nCS and DIR signals are controlled in the same way as for an asynchronous single-read operation on an address/data-multiplexed device.