TTB28F008CV-T80 データシートの表示（PDF） - Intel

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TTB28F008CV-T80

2-MBIT SmartVoltage BOOT BLOCK FLASH MEMORY FAMILY

Intel 

E

2-MBIT SmartVoltage BOOT BLOCK FAMILY

3.2.2

INTELLIGENT IDENTIFIERS

To read the manufacturer and device codes, the

device must be in intelligent identifier read mode,

which can be reached using two methods: by

writing the Intelligent Identifier command (90H) or

by taking the A9 pin to VID. Once in intelligent

identifier read mode, A0 = 0 outputs the manu-

facturer’s identification code and A0 = 1 outputs the

device code. In byte-wide mode, only the lower byte

of the above signatures is read (DQ15/A–1 is a

“don’t care” in this mode). See Table 5 for product

signatures. To return to read array mode, write a

Read Array command (FFH).

Table 5. Intelligent Identifier Table

Product Mfr. ID

Device ID

-T

-B

(Top Boot) (Bottom Boot)

28F200 0089 H 2274 H

2275 H

28F002 89 H

7C H

7D H

3.3 Write Operations

3.3.1

COMMAND USER INTERFACE (CUI)

The Command User Interface (CUI) is the interface

between the microprocessor and the internal chip

controller. Commands are written to the CUI using

standard microprocessor write timings. The

available commands are Read Array, Read

Intelligent Identifier, Read Status Register, Clear

Status Register, Erase and Program (summarized

in Tables 6 and 7). The three read modes are read

array, intelligent identifier read, and status register

read. For Program or Erase commands, the CUI

informs the Write State Machine (WSM) that a

program or erase has been requested. During the

execution of a Program command, the WSM will

control the programming sequences and the CUI

will only respond to status reads. During an erase

cycle, the CUI will respond to status reads and

erase suspend. After the WSM has completed its

task, it will set the WSM Status bit to a “1” (ready),

which indicates that the CUI can respond to its full

command set. Note that after the WSM has

returned control to the CUI, the CUI will stay in the

current command state until it receives another

command.

3.3.1.1

Command Function Description

Device operations are selected by writing specific

commands into the CUI. Tables 6 and 7 define the

available commands.

SEE NEW DESIGN RECOMMENDATIONS

17

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