S29CD016G SPANSION, S29CD016G Datasheet - Page 52

• Manufacturer Part Number: S29CD016G
• Description: 16 Megabit (512 K x 32-Bit) CMOS 2.5 Volt-only Burst Mode / Dual Boot / Simultaneous Read/Write Flash Memory
• Manufacturer: SPANSION

52
SecSi Sector Entry Command
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 contains 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
command codes.
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 7FFC0h–7FFFFh for the
bottom bootblock configuration. Address range 00040h–007FFh for the top boot-
block and 7F800h–7FFBFh return invalid data when addressed with the SecSi
sector enabled. The following commands are permitted after issuing the SecSi
Sector Entry command:
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.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
1.
2.
3.
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”
“Common Flash Interface (CFI) Command” on page 51
Autoselect
Password Program
Password Verify
Password Unlock
Read/Reset
Program
Chip and Sector Erase
SecSi Sector Protection Bit Program
PPB Program
All PPB Erase
PPB Lock Bit Set
DYB Write
DYB/PPB/PPB Lock Bit Verify
Security Reset
Configuration Register Write
Configuration Register Read
Unlock Bypass
CFI
Accelerated Program
A d v a n c e
S29CD016G
I n f o r m a t i o n
for the specific CFI
S29CD016_00_A4 November 5, 2004