S29GL01GS datasheet(26/104 Pages) SPANSION

26 / 104 page

GL-S MirrorBit® Family

S29GL_128S_01GS_00_06 March 16, 2012

Da ta

Sh e e t

5.2

Program and Erase Summary

Flash data bits are erased in parallel in a large group called a sector. The Erase operation places each data

bit in the sector in the logical 1 state (High). Flash data bits may be individually programmed from the erased

1 state to the programmed logical 0 (low) state. A data bit of 0 cannot be programmed back to a 1. A

succeeding read shows that the data is still 0. Only erase operations can convert a 0 to a 1. Programming the

same word location more than once with different 0 bits will result in the logical AND of the previous data and

the new data being programmed.

The duration of program and erase operations is shown in Embedded Algorithm Performance Table

on page 46.

Program and erase operations may be suspended.

 An erase operation may be suspended to allow either programming or reading of another sector (not in the

erase sector) in the erase operation. No other erase operation can be started during an erase suspend.

 A program operation may be suspended to allow reading of another location (not in the Line being

programmed).

 No other program or erase operation may be started during a suspended program operation - program or

erase commands will be ignored during a suspended program operation.

 After an intervening program operation or read access is complete the suspended erase or program

operation may be resumed.

 Program and Erase operations may be interrupted as often as necessary but in order for a program or

erase operation to progress to completion there must be some periods of time between resume and the

next suspend commands greater than or equal to tPRS or tERS in Embedded Algorithm Performance Table

on page 46.

 When an Embedded Algorithm (EA) is complete, the EAC returns to the operation state and address space

from which the EA was started (Erase Suspend or EAC Standby).

The system can determine the status of a program or erase operation by reading the Status Register or using

Data Polling Status. Refer to Status Register on page 37 for information on these status bits. Refer to Data

Polling Status on page 38 for more information.

Any commands written to the device during the Embedded Program Algorithm are ignored except the

Program Suspend, and Status Read command.

Any commands written to the device during the Embedded Erase Algorithm are ignored except Erase

Suspend and Status Read command.

A hardware reset immediately terminates any in progress program / erase operation and returns to read

mode after tRPH time. The terminated operation should be reinitiated once the device has returned to the idle

state, to ensure data integrity.

For performance and reliability reasons reading and programming is internally done on full 32-byte Pages.

ICC3 in DC Characteristics on page 74 represents the active current specification for a write (Embedded

Algorithm) operation.

5.2.1

Program Granularity

The S29GL-S supports two methods of programming, Word or Write Buffer Programming. Each Page can be

programmed by either method. Pages programmed by different methods may be mixed within a Line for the

Industrial Temperature version (-40°C to +85°C). For the In-Cabin version (-40°C to +105°C) the device will

only support one programming operation on each 32-byte page between erase operations and Single Word

Programming command is not supported.

Word programming examines the data word supplied by the command and programs 0’s in the addressed

memory array word to match the 0’s in the command data word.

Write Buffer Programming examines the write buffer and programs 0’s in the addressed memory array Page

to match the 0’s in the write buffer. The write buffer does not need to be completely filled with data. It is

allowed to program as little as a single bit, several bits, a single word, a few words, a Page, multiple Pages, or

the entire buffer as one programming operation. Use of the write buffer method reduces host system

overhead in writing program commands and reduces memory device internal overhead in programming

S29GL01GS датащи(PDF) 26 Page - SPANSION

S29GL01GS датащи(HTML) 26 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 97 98 99 100 ...More

датащи скачать

ссылки URL