S25FL016A0LMAI000 SPANSION [SPANSION], S25FL016A0LMAI000 Datasheet - Page 16

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S25FL016A0LMAI000

Manufacturer Part Number
S25FL016A0LMAI000
Description
16 Megabit CMOS 3.0 Volt Flash Memory with 50MHz SPI (Serial Peripheral Interface) Bus
Manufacturer
SPANSION [SPANSION]
Datasheet
9.2
9.3
14
Read Data Bytes at Higher Speed (FAST_READ)
Read Identification (RDID)
The FAST_READ command reads data from the memory array at the frequency (f
input, with a maximum speed of 50 MHz. The host system must first select the device by driving CS# low. The
FAST_READ command is then written to SI, followed by a 3-byte address (A23-A0) and a dummy byte. Each
bit is latched on the rising edge of SCK. The memory array data, at that address, are output serially on SO at
a frequency f
The FAST_READ command sequence is shown in
any location. The device automatically increments to the next higher address after each byte of data is output.
The entire memory array can therefore be read with a single FAST_READ command. When the highest
address is reached, the address counter reverts to 00000h, allowing the read sequence to continue
indefinitely.
The FAST_READ command is terminated by driving CS# high at any time during data output. The device
rejects any FAST_READ command issued while it is executing a program, erase, or Write Status Register
operation, and continues the operation uninterrupted.
The Read Identification (RDID) command outputs the one-byte manufacturer identification, followed by the
two-byte device identification, to the host system.
JEDEC assigns the manufacturer identification byte; for Spansion devices it is 01h. The device manufacturer
assigns the device identification: the first byte provides the memory type; the second byte indicates the
memory capacity. See
The host system must first select the device by driving CS# low. The RDID command is then written to SI,
and each bit is latched on the rising edge of SCK. The 24-bit device identification data is output from the
memory array on SO at a frequency f
The RDID command sequence is shown in
Driving CS# high after the device identification data has been read at least once terminates the READ_ID
command. Driving CS# high at any time during data output also terminates the RDID operation.
The device rejects any RDID command issued while it is executing a program, erase, or Write Status Register
operation, and continues the operation uninterrupted.
SCK
CS#
SO
SI
Mode 3
Mode 0
Hi-Z
Figure 9.2 Read Data Bytes at Higher Speed (FAST_READ) Command Sequence
SCK
0
, on the falling edge of SCK.
1
2
Command
Table 9.1
3
4
5
6
D a t a
or
7
23 22 21
Table 9.4
8
SCK
9
24-Bit Address
S25FL016A
, on the falling edge of SCK.
10
S h e e t
Figure 9.3
28 29 30
for device ID data.
3
2
Figure 9.2
1
31 32 33
0
( P r e l i m i n a r y )
and
7
6
Table
Dummy Byte
34 35 36 37 38
5
and
4
9.4.
3
Table
2
1
9.4. The first byte specified can be at
39
0
MSB
7
40 41
6
5
S25FL016A_00_C0 August 28, 2006
42 43 44 45
DATA OUT 1
SCK
4
) presented at the SCK
3
2
1
46
0
47
MSB
7
DATA OUT 2

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