S29PL-J55BAI011 datasheet(58/96 Pages) SPANSION

58 / 96 page

S29PL-J

S29PL-J_00_A9 September 22, 2006

Data

Sheet

(Adv an ce

Inf o r m a t io n)

15.2

Reset Command

Writing the reset command resets the banks to the read or erase-suspend-read mode. Address bits are don’t

cares for this command.

The reset command may be written between the sequence cycles in an erase command sequence before

erasing begins. This resets the bank to which the system was writing to the read mode. Once erasure begins,

however, the device ignores reset commands until the operation is complete.

The reset command may be written between the sequence cycles in a program command sequence before

programming begins. This resets the bank to which the system was writing to the read mode. If the program

command sequence is written to a bank that is in the Erase Suspend mode, writing the reset command

returns that bank to the erase-suspend-read mode. Once programming begins, however, the device ignores

reset commands until the operation is complete.

The reset command may be written between the sequence cycles in an autoselect command sequence.

Once in the autoselect mode, the reset command must be written to return to the read mode. If a bank

entered the autoselect mode while in the Erase Suspend mode, writing the reset command returns that bank

to the erase-suspend-read mode.

If DQ5 goes high during a program or erase operation, writing the reset command returns the banks to the

read mode (or erase-suspend-read mode if that bank was in Erase Suspend and program-suspend-read

mode if that bank was in Program Suspend).

15.3

Autoselect Command Sequence

The autoselect command sequence allows the host system to access the manufacturer and device codes,

and determine whether or not a sector is protected. The autoselect command sequence may be written to an

address within a bank that is either in the read or erase-suspend-read mode. The autoselect command may

not be written while the device is actively programming or erasing in the other bank.

The autoselect command sequence is initiated by first writing two unlock cycles. This is followed by a third

write cycle that contains the bank address and the autoselect command. The bank then enters the autoselect

mode. The system may read any number of autoselect codes without reinitiating the command sequence.

Table 15.1 on page 62 shows the address and data requirements. To determine sector protection

information, the system must write to the appropriate bank address (BA) and sector address (SA). Table 10.4

on page 21 shows the address range and bank number associated with each sector.

The system must write the reset command to return to the read mode (or erase-suspend-read mode if the

bank was previously in Erase Suspend).

15.4

Enter/Exit Secured Silicon Sector Command Sequence

The Secured Silicon Sector region provides a secured data area containing a random, eight word electronic

serial number (ESN). The system can access the Secured Silicon Sector region by issuing the three-cycle

Enter Secured Silicon Sector command sequence. The device continues to access the Secured Silicon

Sector region until the system issues the four-cycle Exit Secured Silicon Sector command sequence. The Exit

Secured Silicon Sector command sequence returns the device to normal operation. The Secured Silicon

Sector is not accessible when the device is executing an Embedded Program or embedded Erase algorithm.

Table 15.1 on page 62 shows the address and data requirements for both command sequences. See also

Secured Silicon Sector Flash Memory Region on page 50 for further information. Note that the ACC function

and unlock bypass modes are not available when the Secured Silicon Sector is enabled.

S29PL-J55BAI011 Datasheet(PDF) 58 Page - SPANSION

S29PL-J55BAI011 Datasheet(HTML) 58 Page - SPANSION

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96

Datasheet Download

Link URL