Device Architecture
2-50 Revision 4
Read Operation
Read operations are designed to read data from the FB Array, Page Buffer, Block Buffer, or status
registers. Read operations support a normal read and a read-ahead mode (done by asserting
READNEXT). Also, the timing for Read operations is dependent on the setting of PIPE.
The following diagrams illustrate representative timing for Non-Pipe Mode (Figure 2-38) and Pipe Mode
(Figure 2-39) reads of the flash memory block interface.
Figure 2-38 • Read Waveform (Non-Pipe Mode, 32-bit access)
Figure 2-39 • Read Waveform (Pipe Mode, 32-bit access)
CLK
REN
ADDR[17:0]
DATAWIDTH[1:0]
BUSY
STATUS[1:0]
RD[31:0]
A0 A1 A2 A3 A4
0 S0S1S2 S4
0D0D1D20D3
0S3
D4 0
A0 A1 A2 A3 A4
0S0S1S2
D2
S4
0
0
D0 D1 D4X0
CLK
REN
ADDR[17:0]
DATAWIDTH[1:0]
BUSY
STATUS[1:0]
RD[31:0]
S3
0D3