SPRUIE9D May 2017 – May 2024 DRA74P , DRA75P , DRA76P , DRA77P
Figure 17-69 shows an asynchronous single-write operation on an AAD-multiplexed device.
For formulas to calculate timing parameters, see Section 17.4.5.6.1, GPMC Timing Parameters Formulas.
Table 17-458 lists the timing bit fields to set up to configure the GPMC in asynchronous single-write mode.
When the GPMC generates a write 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 second phase for LSB address is qualified with nOE driven high. The address phase ends at nWE assertion time.
The nCS, nWE, and DIR signals are controlled in the same way as for an asynchronous single-write operation on an address/data-multiplexed device. See Table 17-449.
The address bits for the first address phase are driven onto the data bus until nOE deassertion. Data is driven onto the address/data bus at the clock edge defined by the GPMC_CONFIG6_i[19:16] WRDATAONADMUXBUS parameter.