N25Q032A13E1241F Datasheet, PDF (61/153 Pages) Micron Technology – 32-Mbit 3 V, multiple I/O, 4-Kbyte subsector erase, XiP enabled, serial flash memory with 108 MHz SPI bus interface

N25Q032 - 3 V
Instructions
Figure 15. Dual I/O Fast Read instruction sequence
S
Mode 3
C _{Mode 0}
DQ0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Instruction
*24-bit Address
22 20 18 16 14 12 10 8 6 4 2 0
DQ1
S
C
DQ0
DQ1
23 21 19 17 15 13 11 9 7 5 3 1
Dummy Cycles
23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39
IO switches from Input to Output
6420642064206420 6
75317531 75317531 7
Byte 1
Byte 2
Byte 3
Byte 4
9.1.7
Note:
*Address bits A23 and A22 are “Don’t Care.”
Quad Output Fast Read
The Quad Output Fast Read (QOFR) instruction is very similar to the Dual Output Fast
Read (DOFR) instruction, except that the data are shifted out on four pins (pin DQ0, pin
DQ1, pin W/VPP/DQ2 and pin HOLD/DQ3 (1) instead of only two. Outputting the data on
four pins instead of one doubles the data transfer bandwidth compared to the Dual Output
Fast Read (DOFR) instruction.
The device is first selected by driving Chip Select (S) Low. The instruction code for the Quad
Output Fast Read instruction is followed by a 3-byte address (A23-A0) and a configurable
number of dummy clock cycles, each bit being latched-in during the rising edge of Serial
Clock (C). Then the memory contents, at that address, are shifted out on pin DQ0, pin DQ1,
pin W/VPP/DQ2 and pin HOLD/DQ3 (1) at a maximum frequency fC, during the falling edge
of Serial Clock (C).
The first byte addressed can be at any location. The address is automatically incremented
to the next higher address after each byte of data is shifted out on pin DQ0, pin DQ1, pin
W/VPP/DQ2 and pin HOLD/DQ3 (1). The whole memory can, therefore, be read with a
single Quad Output Fast Read (QOFR) instruction.
When the highest address is reached, the address counter rolls over to 00 0000h, so that
the read sequence can be continued indefinitely.
Reset functionality is available instead of Hold in devices with a dedicated part number. See
Section 16: Ordering information.
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