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参数资料
| 型号： | S29CD016G0MFAN002 |
| 厂商： | SPANSION LLC |
| 元件分类： | PROM |
| 英文描述： | 16 Megabit (512 K x 32-Bit) CMOS 2.5 Volt-only Burst Mode, Dual Boot, Simultaneous Read/Write Flash Memory |
| 中文描述： | 512K X 32 FLASH 2.7V PROM, 64 ns, PBGA80 |
| 封装： | 13 X 11 MM, 1 MM PITCH, FORTIFIED, BGA-80 |
| 文件页数： | 47/81页 |
| 文件大小： | 1276K |
| 代理商： | S29CD016G0MFAN002 |
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March 3, 2009 S29CD-G_00_B1
S29CD-G Flash Family
49
Da ta
Shee t
(Prelim i nar y )
The Persistent Sector Protection Mode Locking Bit Program command is permitted if the Secured Silicon
sector is enabled.
15.20 PPB Lock Bit Set Command
The PPB Lock Bit Set command is used to set the PPB Lock bit if it is cleared either at reset or if the
Password Unlock command was successfully executed. There is no PPB Lock Bit Clear command. Once the
PPB Lock Bit is set, it cannot be cleared unless the device is taken through a power-on clear or the Password
Unlock command is executed. Upon setting the PPB Lock Bit, the PPBs are latched into the DYBs. If the
Password Mode Locking Bit is set, the PPB Lock Bit status is reflected as set, even after a power-on reset
cycle. Exiting the PPB Lock Bit Set command is accomplished by writing the Read/Reset command.
The PPB Lock Bit Set command is permitted if the Secured Silicon sector is enabled.
15.21 DYB Write Command
The DYB Write command is used to set or clear a DYB for a given sector. The high order address bits (A19–
A11) are issued at the same time as the code 01h or 00h on DQ7-DQ0. All other DQ data bus pins are
ignored during the data write cycle. The DYBs are modifiable at any time, regardless of the state of the PPB
or PPB Lock Bit. The DYBs are cleared at power-up or hardware reset. Exiting the DYB Write command is
accomplished by writing the Read/Reset command.
The DYB Write command is permitted if the Secured Silicon sector is enabled.
15.22 Password Unlock Command
The Password Unlock command is used to clear the PPB Lock Bit so that the PPBs can be unlocked for
modification, thereby allowing the PPBs to become accessible for modification. The exact password must be
entered in order for the unlocking function to occur. This command cannot be issued any faster than 2 s at a
time to prevent a hacker from running through the all 64-bit combinations in an attempt to correctly match a
password. If the command is issued before the 2 s execution window for each portion of the unlock, the
command is ignored.
The Password Unlock function is accomplished by writing Password Unlock command and data to the device
to perform the clearing of the PPB Lock Bit. The password is 64 bits long, so the user must write the
Password Unlock command 2 times for a x32 bit data bus. A0 is used to determine whether the 32 bit data
quantity is used to match the upper 32 bits or lower 32 bits. Writing the Password Unlock command is
address order specific. In other words, for the x32 data bus configuration, the lower 32 bits of the password
are written first and then the upper 32 bits of the password are written. Writing out of sequence results in the
Password Unlock not returning a match with the password and the PPB Lock Bit remains set.
Once the Password Unlock command is entered, the RY/BY# pin goes LOW indicating that the device is
busy. Also, reading the small bank (25% bank) results in the DQ6 pin toggling, indicating that the Password
Unlock function is in progress. Reading the large bank (75% bank) returns actual array data. Approximately
1uSec is required for each portion of the unlock. Once the first portion of the password unlock completes (RY/
BY# is not driven and DQ6 does not toggle when read), the Password Unlock command is issued again, only
this time with the next part of the password. The second Password Unlock command is the final command
before the PPB Lock Bit is cleared (assuming a valid password). As with the first Password Unlock command,
the RY/BY# signal goes LOW and reading the device results in the DQ6 pin toggling on successive read
operations until complete. It is the responsibility of the microprocessor to keep track of the number of
Password Unlock commands (2 for x32 bus), the order, and when to read the PPB Lock bit to confirm
successful password unlock
The Password Unlock command is permitted if the Secured Silicon sector is enabled.
15.23 PPB Program Command
The PPB Program command is used to program, or set, a given PPB. Each PPB is individually programmed
(but is bulk erased with the other PPBs). The specific sector address (A19–A11) are written at the same time
as the program command 60h with A6 = 0. If the PPB Lock Bit is set and the corresponding PPB is set for the
sector, the PPB Program command does not execute and the command times-out without programming the
PPB.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| S29CD016G0MFAN003 | 制造商:SPANSION 制造商全称:SPANSION 功能描述:16 Megabit (512 K x 32-Bit) CMOS 2.5 Volt-only Burst Mode, Dual Boot, Simultaneous Read/Write Flash Memory |
| S29CD016G0MFAN010 | 制造商:SPANSION 制造商全称:SPANSION 功能描述:16 Megabit (512 K x 32-Bit) CMOS 2.5 Volt-only Burst Mode, Dual Boot, Simultaneous Read/Write Flash Memory |
| S29CD016G0MFAN011 | 制造商:SPANSION 制造商全称:SPANSION 功能描述:16 Megabit (512 K x 32-Bit) CMOS 2.5 Volt-only Burst Mode, Dual Boot, Simultaneous Read/Write Flash Memory |
| S29CD016G0MFAN012 | 制造商:SPANSION 制造商全称:SPANSION 功能描述:16 Megabit (512 K x 32-Bit) CMOS 2.5 Volt-only Burst Mode, Dual Boot, Simultaneous Read/Write Flash Memory |
| S29CD016G0MFAN013 | 制造商:SPANSION 制造商全称:SPANSION 功能描述:16 Megabit (512 K x 32-Bit) CMOS 2.5 Volt-only Burst Mode, Dual Boot, Simultaneous Read/Write Flash Memory |
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