DLPS014F April 2010 – May 2018 DLPC200
PRODUCTION DATA.
The controller parallel flash memory interface supports a high-speed NOR device with a 16-bit data bus and up to 1 GB of memory.
To perform an asynchronous read, an address is driven onto the address bus, and CE is asserted. WE and RST must already have been deasserted. WAIT is configured to be active low and is set to a deasserted state. ADV must be held low throughout the read cycle. CLK is not used for asynchronous reads and is ignored. After OE is asserted, the data is driven onto DQ[15:0] after an initial access time tAVQV or tGLQV delay.
The WAIT signal indicates data valid when the device is operating in asynchronous mode (RCR.15 = 0). The WAIT signal is only deasserted when data is valid on the bus. When the device is operating in asynchronous non-array read mode, such as read status, read ID, or read query, the WAIT signal is also deasserted when data is valid on the bus. WAIT behavior during asynchronous non-array reads at the end of the word line works correctly only on the first data access.
To perform a write operation, both CE and WE are asserted while RST and OE are deasserted. During a write operation, address and data are latched on the rising edge of WE or CE, whichever occurs first. When the device is operating in write operations, WAIT is set to a deasserted state as determined by RCR.10.