
September 22, 2006 S29PL-J_00_A9
S29PL-J
55
D a t a
S h e e t
( A d v a n c e
I n f o r m a t i o n )
15. Command Definitions
Writing specific address and data commands or sequences into the command register initiates device 
operations. 
Table 15.1 on page 62
 defines the valid register command sequences. Writing 
incorrect
address and data values
 or writing them in the 
improper sequence
 may place the device in an unknown 
state. A reset command is then required to return the device to reading array data.
All addresses are latched on the falling edge of WE# or CE# (CE1# / CE2# in PL129J), whichever happens 
later. All data is latched on the rising edge of WE# or CE# (CE1# / CE2# in PL129J), whichever happens first. 
Refer to 
AC Characteristic
  on page 72
 for timing diagrams.
15.1
Reading Array Data
The device is automatically set to reading array data after device power-up. No commands are required to 
retrieve data. Each bank is ready to read array data after completing an Embedded Program or Embedded 
Erase algorithm.
After the device accepts an Erase Suspend command, the corresponding bank enters the erase-suspend-
read mode, after which the system can read data from any non-erase-suspended sector within the same 
bank. The system can read array data using the standard read timing, except that if it reads at an address 
within erase-suspended sectors, the device outputs status data. After completing a programming operation in 
the Erase Suspend mode, the system may once again read array data with the same exception. See 
Erase 
Suspend/Erase Resume Commands
  on page 60
 for more information.
After the device accepts a Program Suspend command, the corresponding bank enters the program-
suspend-read mode, after which the system can read data from any non-program-suspended sector within 
the same bank. See 
Program Suspend/Program Resume Commands
  on page 61
 for more information.
The system 
must
 issue the reset command to return a bank to the read (or erase-suspend-read) mode if DQ5 
goes high during an active program or erase operation, or if the bank is in the autoselect mode. See the next 
section, 
Reset Command
  on page 56
, for more information.
See also 
Requirements for Reading Array Data
  on page 20
 for more information. The table 
AC Characteristic
on page 72
 provides the read parameters, and 
Figure 16.2  on page 66
 shows the timing diagram.
4Fh
0001h
Top/Bottom Boot Sector Flag
00h = Uniform device, 01h = Both top and bottom boot with write protect, 
02h = Bottom Boot Device, 03h = Top Boot Device, 
04h = Both Top and Bottom
50h
0001h
Program Suspend
0 = Not supported, 1 = Supported
57h
0004h
Bank Organization
00 = Data at 4Ah is zero, X = Number of Banks
58h
0027h (PL127J)
0027h (PL129J)
0017h (PL064J)
000Fh (PL032J)
Bank 1 Region Information
X = Number of Sectors in Bank 1
59h
0060h (PL127J)
0060h (PL129J)
0030h (PL064J)
0018h (PL032J)
Bank 2 Region Information
X = Number of Sectors in Bank 2
5Ah
0060h (PL127J)
0060h (PL129J)
0030h (PL064J)
0018h (PL032J)
Bank 3 Region Information
X = Number of Sectors in Bank 3
5Bh
0027h (PL127J)
0027h (PL129J)
0017h (PL064J)
000Fh (PL032J)
Bank 4 Region Information
X = Number of Sectors in Bank 4
Table 14.4  
Primary Vendor-Specific Extended Query (Continued)
Addresses
Data
Description