CD016G0PFA Advanced Micro Devices, Inc., CD016G0PFA Datasheet - Page 54

• Manufacturer Part Number: CD016G0PFA
• Description: 16 Megabit(512 K X 32-Bit),CMOS 2.5 Volt-only Burst Mode, Dual Boot, Simultaneous Read/write Flash Memory
• Manufacturer: Advanced Micro Devices, Inc.

54
Common Flash Interface (CFI) Command
SecSi Sector Entry Command
The Configuration Register Read Command is fully operational if the SecSi sector
is enabled.
The Common Flash Interface (CFI) command provides device size, geometry, and
capability information directly to the users system. Flash devices that support
CFI, have a “Query Command” that returns information about the device to the
system. The Query structure contents are read at the specific address locations
following a single system write cycle where:
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
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.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
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 Memory Interface (CFI)
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
A d v a n c e
S29CD016G
for the specific CFI command codes.
I n f o r m a t i o n
S29CD016_00A0 March 22, 2004