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GE28F320C3TC70 Datasheet(HTML) 19 Page - Intel Corporation

Part No. GE28F320C3TC70
Description  Advanced Boot Block Flash Memory (C3)
Download  68 Pages
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Maker  INTEL [Intel Corporation]
Homepage  http://www.intel.com
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GE28F320C3TC70 Datasheet(HTML) 19 Page - Intel Corporation

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Intel£ Advanced+ Boot Block Flash Memory (C3)
Datasheet
19
4.0
Modes of Operation
4.1
Read Mode
The flash memory has four read modes (read array, read identifier, read status, and CFI query), and
two write modes (program and erase). Three additional modes (erase suspend to program, erase
suspend to read, and program suspend to read) are available only during suspended operations.
Table 7, “Command Bus Operations” on page 24 and Table 8, “Command Codes and
Descriptions”on page25 summarize the commands used to reach these modes. Appendix A,
“Write State Machine States” on page 50 is a comprehensive chart showing the state transitions.
4.1.1
Read Array
When RP# transitions from VIL (reset) to VIH, the device defaults to read-array mode and will
respond to the read-control inputs (CE#, address inputs, and OE#) without any additional CUI
commands.
When the device is in read array mode, four control signals control data output.
WE# must be logic high (VIH)
CE# must be logic low (VIL)
OE# must be logic low (VIL)
RP# must belogichigh (VIH)
In addition, the address of the desired location must be applied to the address pins. If the device is
not in read-array mode, as would be the case after a Program or Erase operation, the Read Array
command (0xFF) must be issued to the CUI before array reads can occur.
4.1.2
Read Identifier
The read-identifier mode outputs three types of information: the manufacturer/device identifier, the
block locking status, and the protection register. The device is switched to this mode by issuing the
Read Identifier command (0x90). Once in this mode, read cycles from addresses shown in Table 6
retrieve the specified information. To return to read-array mode, issue the Read Array command
(0xFF).


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