Document Number: 002-00948 Rev. *C
S29CD032J
S29CD016J
S29CL032J
S29CL016J
7.5
Autoselect
The autoselect mode provides manufacturer and device identification, and sector protection verification, through identifier codes
output on DQ7–DQ0. This mode is primarily intended for programming equipment to automatically match a device to be
programmed with its corresponding programming algorithm. However, the autoselect codes can also be accessed in-system
through the command register.
When using programming equipment, the autoselect mode requires V
ID
on address pin A9. Ad-dress pins A6, A1, and A0 must be
. In addition, when verifying sector protection, the sector address must appear on the appropriate highest order
shows the remaining address bits that are don’t care. When all necessary bits have been set as required, the
programming equipment may then read the corresponding identifier code on DQ7–DQ0.
To access the autoselect codes in-system, the host system can issue the autoselect command via the command. This method does
not require VID. See
Command Definitions on page 67
for details on using the autoselect mode. Autoselect mode can be used in
either synchronous (Burst) mode or asynchronous (Non Burst) mode.
The system must write the reset command to exit the autoselect mode and return to reading the array data. See
for
command sequence details.
Legend
L = Logic Low = V
IL
, H = Logic High = V
IH
, SA = Sector Address, X = Don’t care.
Note
37.The autoselect codes can also be accessed in-system via command sequences. See
Table 11. S29CD-J and S29CL-J Flash Family Autoselect Codes (High Voltage Method)
Description
CE#
OE# WE# A19 to A11 A10
A9
A8 A7 A6 A5 to A4 A3 A2 A1 A0
DQ7 to DQ0
Manufacturer ID
:
Cypress
L
L
H
X
X
V
ID
X
X
L
X
X
X
L
L
0001h
Autoselect Device Co
de
Read Cycle 1
L
L
H
X
X
V
ID
X
L
L
X
L
L
L
H
007Eh
Read Cycle 2
L
L
H
X
X
V
ID
X
L
L
L
H
H
H
L
08h or 36h for CD016J
46h for CL016J
09h for CD032J
49h for CL032J
Read Cycle 3
L
L
H
X
X
V
ID
X
L
L
L
H
H
H
H
0000h
Top Boot Option
0001h
Bottom Boot Option
PPB Protection Status
L
L
H
SA
X
V
ID
X
L
L
L
L
L
H
L
0000h (unprotected)
0001h (protected)
