參數(shù)資料
型號(hào): PC28F640J3F75A
元件分類(lèi): PROM
英文描述: 4M X 16 FLASH 2.7V PROM, PBGA64
封裝: LEAD FREE, BGA-64
文件頁(yè)數(shù): 30/66頁(yè)
文件大?。?/td> 740K
代理商: PC28F640J3F75A
Numonyx Embedded Flash Memory (J3 65 nm) Single Bit per Cell (SBC)
Datasheet
March 2010
36
208032-02
The Read Array command functions independent of the voltage level on VPEN.
9.2.2
Read Status Register
Issuing the Read Status Register command places the device in Read Status Register
mode. Subsequent reads output Status Register information on DQ[7:0], and 00h on
DQ[15:8]. The device remains in Read Status Register mode until a different read-
mode command is issued. Performing a program, erase, or block-lock operation also
changes the device’s read mode to Read Status Register mode.
The Status Register is updated on the falling edge of OE# or CEx, whichever occurs
last. Status Register contents are valid only when SR.7 = 1. When WSM is active, SR.7
indicates the WSM’s state and SR[6:0] are in high-Z state.
The Read Status Register command functions independent of the voltage level on
VPEN.
9.2.3
Read Device Information
Issuing the Read Device Information command places the device in Read Device
Information mode. Subsequent reads output device information on DQ[15:0].
The device remains in Read Device Information mode until a different read command is
issued. Also, performing a program, erase, or block-lock operation changes the device
to Read Status Register mode.
The Read Device Information command functions independent of the voltage level on
VPEN.
9.2.4
CFI Query
The CFI query table contains an assortment of flash product information such as block
size, density, allowable command sets, electrical specifications, and other product
information. The data contained in this table conforms to the CFI protocol.
Issuing the CFI Query command places the device in CFI Query mode. Subsequent
reads output CFI information on DQ[15:0]. The device remains in CFI Query mode until
a different read command is issued, or a program or erase operation is performed,
which changes the read mode to Read Status Register mode.
The CFI Query command functions independent of the voltage level on VPEN.
9.3
Programming Operations
All programming operations require the addressed block to be unlocked, and a valid
VPEN voltage applied throughout the programming operation. Otherwise, the
programming operation will abort, setting the appropriate Status Register error bit(s).
The following sections describe each programming method.
9.3.1
Single-Word/Byte Programming
Array programming is performed by first issuing the Single-Word/Byte Program
command. This is followed by writing the desired data at the desired array address. The
read mode of the device is automatically changed to Read Status Register mode, which
remains in effect until another read-mode command is issued.
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