MX25L12835F
9-16. Burst Read
This device supports Burst Read in both SPI and QPI mode.
To set the Burst length, following command operation is required to issue command: “C0h” in the first Byte (8-clocks),
following 4 clocks defining wrap around enable with “0h” and disable with“1h”.
The next 4 clocks are to define wrap around depth. Their definitions are as the following table:
Data
00h
01h
02h
03h
1xh
Wrap Around
Wrap Depth
8-byte
Yes
Yes
Yes
Yes
No
16-byte
32-byte
64-byte
X
The wrap around unit is defined within the 256Byte page, with random initial address. It is defined as “wrap-around
mode disable” for the default state of the device. To exit wrap around, it is required to issue another “C0” command
in which data=‘1xh”. Otherwise, wrap around status will be retained until power down or reset command. To change
wrap around depth, it is requried to issue another “C0” command in which data=“0xh”. QPI “EBh” and SPI “EBh”
support wrap around feature after wrap around is enabled. Burst read is supported in both SPI and QPI mode. The
device is default without Burst read.
Figure 33. SPI Mode
CS#
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Mode 3
Mode 0
SCLK
SIO
D7
D6
D5
D4
D3
D2
D1
D0
C0h
Figure 34. QPI Mode
CS#
0
1
2
3
Mode 3
Mode 0
SCLK
C0h
H0
L0
SIO[3:0]
MSB LSB
Note: MSB=Most Significant Bit
LSB=Least Significant Bit
P/N: PM1795
REV. 1.0, OCT. 23, 2012
45
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