Datasheet

23A1024/23LC1024
DS20005142C-page 16  2012-2015 Microchip Technology Inc.
4.2 Quad Interface Mode
In addition to the Serial Dual interface (SDI) mode of
operation Serial Quad Interface (SQI) is also
supported. In this mode the HOLD functionality is not
available. To enter SQI mode the EQIO command must
be clocked in (Figure 4-4).
FIGURE 4-4: ENTER SQI MODE (EQIO) FROM SPI MODE
FIGURE 4-5: BYTE READ MODE SQI
SCK
0 2345671
SI
High-Impedance
SO
CS
000111 00
Note 1: Page and Sequential mode is similar in that additional bytes can be clocked out before CS is
brought high.
2: The first byte read after the address will be a dummy byte.
CS
SCK
0 2345671
8
9
1
0
40
20 16 12 8
SIO0
1
0
51
21 17 13 9
0 0
62
22 18 14 10
0
0 73
23 19 15 11
SIO1
SIO2
SIO3
Instruction
24-Bit Address Dummy Byte
10 11
4
0
5
1
6
2
7
3
Data Out