S29GL01GS10DFIV13 datasheet(16/108 Pages) CYPRESS

16 / 108 page

Document Number: 001-98285 Rev. *R

Page 16 of 108

S29GL01GS/S29GL512S

S29GL256S/S29GL128S

3.4.6

Sector Protection States Summary

Each sector can be in one of the following protection states:



Unlocked – The sector is unprotected and protection can be changed by a simple command. The protection state defaults

to unprotected after a power cycle or hardware reset.



Dynamically Locked – A sector is protected and protection can be changed by a simple command. The protection state is

not saved across a power cycle or hardware reset.



Persistently Locked – A sector is protected and protection can only be changed if the PPB Lock Bit is set to 1. The

protection state is non-volatile and saved across a power cycle or hardware reset. Changing the protection state requires

programming or erase of the PPB bits.

3.4.7

Lock Register

The Lock Register holds the non-volatile OTP bits for controlling protection of the SSR, and determining the PPB Lock bit

management method (protection mode).

The Secure Silicon Region (SSR) protection bits must be used with caution, as once locked, there is no procedure available for

unlocking the protected portion of the Secure Silicon Region and none of the bits in the protected Secure Silicon Region memory

space can be modified in any way. Once the Secure Silicon Region area is protected, any further attempts to program in the area will

fail with status indicating the area being programmed is protected. The Region 0 Indicator Bit is located in the Lock Register at bit

location 0 and Region 1 in bit location 6.

Table 3.1 Sector Protection States

Protection Bit Values

Sector State

PPB Lock

PPB

DYB

Unprotected - PPB and DYB are changeable

Protected - PPB and DYB are changeable

Unprotected - PPB not changeable, DYB is changeable

Protected - PPB not changeable, DYB is changeable

Table 3.2 Lock Register

Bit

Default Value

Name

15-9

Reserved

SSR Region 1 (Customer) Lock Bit

Reserved

Password Protection Mode Lock Bit

Persistent Protection Mode Lock Bit

SSR Region 0 (Factory) Lock Bit

S29GL01GS10DFIV13 Datasheet(PDF) 16 Page - Cypress Semiconductor

S29GL01GS10DFIV13 Datasheet(HTML) 16 Page - Cypress Semiconductor

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 97 98 99 100 ...More

Datasheet Download

Link URL