A d v a n c e I n f o r m a t i o n
A 98h query command code is written to 55h address location within the de-
vice’s address space
The device is initially in any valid read state, such as “Read Array” or “Read
ID Data”
Other device statistics may exist within a long sequence of commands or data in-
put; such sequences must first be completed or terminated before writing of the
98H Query command, otherwise invalid Query data structure output may result.
Note that for data bus bits greater than DQ7 (DQ31–DQ8), the valid Query access
code has all zeroes (“0”s) in the upper DQ bus locations. Thus, the 16-bit Query
command code is 0098h and the 32-bit Query command code is 00000098h.
To terminate the CFI operation, it is necessary to execute the Read/Reset
command.
The CFI command is not permitted if the SecSi sector is enabled and Simulta-
neous Read/Write operation is disabled once the command is entered.
See Common Flash Memory Interface (CFI) for the specific CFI command codes.
SecSi Sector Entry Command
The SecSi Sector Entry command enables the SecSi (OTP) sector to overlay the
8 KB outermost sector in the small (25%) bank. The SecSi sector overlays
00000h–0003Fh for the top bootblock configuration and FFF70h–FFFFFh for the
bottom bootblock configuration. Address range 00040h–007FFh for the top boot-
block and FF00h–FFF7Fh return invalid data when addressed with the SecSi
sector enabled. The following commands are permitted after issuing the SecSi
Sector Entry command:
1.
Autoselect
2.
Password Program
Password Verify
3.
4.
Password Unlock
Read/Reset
5.
6.
Program
7.
Chip and Sector Erase
SecSi Sector Protection Bit Program
PPB Program
8.
9.
10.
11.
12.
13.
14.
15.
16.
All PPB Erase
PPB Lock Bit Set
DYB Write
DYB/PPB/PPB Lock Bit Verify
Security Reset
Configuration Register Write
Configuration Register Read
The following commands are unavailable when the SecSi sector is enabled. Issu-
ing the following commands while the SecSi sector is enabled results in the
command being ignored.
1.
2.
3.
4.
5.
Unlock Bypass
CFI
Accelerated Program
Program and Sector Erase Suspend
Program and Sector Erase Resume
March 22, 2004 30606B0
S29CD032G
55
SPANSION [ SPANSION ]
