S25FL129P Meet Spansion Inc., S25FL129P Datasheet - Page 33

• Manufacturer Part Number: S25FL129P
• Description: 128-mbit Cmos 3.0 Volt Flash Memory With 104-mhz Spi Serial Peripheral Interface Multi I/o Bus
• Manufacturer: Meet Spansion Inc.

9.7
November 2, 2009 S25FL129P_00_04
Read Identification (RDID)
The Read Identification (RDID) command outputs the one-byte manufacturer identification, followed by the
two-byte device identification and the bytes for the Common Flash Interface (CFI) tables. The manufacturer
identification is assigned by JEDEC; for Spansion devices, it is 01h. The device identification (2 bytes) and
CFI bytes are assigned by the device manufacturer.
See
The Common Flash Interface (CFI) specification outlines device and host system software interrogation
handshake, which allows vendor-specified software algorithms to be used for entire families of devices.
Software support can then be device-independent, JEDEC ID-independent, and forward- and backward-
compatible for the specified flash device families. Flash vendors can standardize their existing interfaces for
long-term compatibility. The system can read CFI information at the addresses given in
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. One byte of manufacture identification, two bytes of device
identification and sixty-six bytes of extended device identification are then output from the memory array on
SO at a frequency f
command is 50 MHz (Normal Read). The manufacturer ID and Device ID can be read repeatedly by applying
multiples of six hundred and forty eight clock cycles. The manufacturer ID, Device ID and CFI table can be
continuously read as long as CS# is held low with a clock input.
The RDID command sequence is shown in
Driving CS# high after the device identification data has been read at least once terminates the RDID
command. Driving CS# high at any time during data output (for example, while reading the extended CFI
bytes), also terminates the RDID operation.
The device rejects any RDID command issued while it is executing a program, erase, or Write Registers
operation, and continues the operation uninterrupted.
Table 9.2 on page 34
W#/ACC/IO2
HOLD#/IO3
SO/IO1
SI/IO0
SCK
CS#
D a t a
Figure 9.8 Continuous QUAD I/O High Performance Instruction Sequence
R
, on the falling edge of SCK. The maximum clock frequency for the RDID (9Fh)
S h e e t
20
21
22
for device ID data.
23
*
0
16
17
18
19
Address
1
24 Bit
( P r e l i m i n a r y )
4
S25FL129P
0
2
3
1
5
Figure 9.9
Mode Bits
5
6
4
7
*
6
0
1
2
3
7
DUMMY
8
and
9
Table 9.1 on page
DUMMY
10
11
6
4
5
7
*
Byte 1
12
0
2
1
3
13
IO’s Switches from Input to Output
4
5
6
7
*
Byte 2
14
25.
0
1
2
3
15
16
4
5
6
7
*
*MSB
Table
9.3.
33