3.3.9.2.2 Byte Select Access

In this mode, read/write operations can be enabled/disabled at a byte level. One byte-select line per byte of the data bus is provided. One NRD signal and one NWE signal control read and write.

For 16-bit devices, the SMC provides NBS0 and NBS1 selection signals for respectively byte0 (lower byte) and byte1 (upper byte) of a 16-bit bus.

Byte Select Access is used to connect one 16-bit device.

Figure 3-16. Connection of 2 x 8-bit Devices on a 16-bit Bus: Byte Write Option