M1AFS600-PQ208 Datasheet, PDF (66/334 Pages) Microsemi Corporation – Fusion Family of Mixed Signal FPGAs

Device Architecture
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.
CLK
REN
ADDR[17:0]
A0
A1
A2 A3
DATAWIDTH[1:0]
BUSY
STATUS[1:0]
0
S0 S1 S2 S3
RD[31:0]
0
D0 D1 D2 D3
Figure 2-38 • Read Waveform (Non-Pipe Mode, 32-bit access)
A4
0
S4
0
D4
0
CLK
REN
ADDR[17:0]
A0
A1
A2 A3
DATAWIDTH[1:0]
BUSY
STATUS[1:0]
0
S0 S1 S2 S3
RD[31:0]
0
D0 D1 D2 D3
Figure 2-39 • Read Waveform (Pipe Mode, 32-bit access)
A4
0
S4
0
X D4 0
2-50
Revision 4