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N25Q128 Datasheet(PDF) 16 Page - Numonyx B.V

Part No. N25Q128
Description  128-Mbit, 1.8 V, multiple I/O, 4-Kbyte subsector erase on boot sectors, XiP enabled, serial flash memory with 108 MHz SPI bus interface
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Maker  NUMONYX [Numonyx B.V]
Homepage  http://www.numonyx.com
Logo NUMONYX - Numonyx B.V

N25Q128 Datasheet(HTML) 16 Page - Numonyx B.V

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Signal descriptions
N25Q128 - 1.8 V
16/185
2
Signal descriptions
2.1
Serial data output (DQ1)
This output signal is used to transfer data serially out of the device. Data are shifted out on
the falling edge of Serial Clock (C). When used as an Input, It is latched on the rising edge
of the Serial Clock (C).
In the Extended SPI protocol, during the Quad and Dual Input Fast Program (QIFP, DIFP)
instructions and during the Quad and Dual Input Extended Fast Program (QIEFP, DIEFP)
instructions, pin DQ1 is used also as an input.
In the Dual I/O SPI protocol (DIO-SPI) the DQ1 pin always acts as an input/output.
In the Quad I/O SPI protocol (QIO-SPI) the DQ1 pin always acts as an input/output, with the
exception of the Program or Erase cycle performed with the Enhanced Program Supply
Voltage (VPP). In this case the device temporarily goes in Extended SPI protocol. The
protocol then becomes QIO-SPI as soon as the VPP pin voltage goes low.
2.2
Serial data input (DQ0)
This input signal is used to transfer data serially into the device. It receives instructions,
addresses, and the data to be programmed. Values are latched on the rising edge of Serial
Clock (C). Data are shifted out on the falling edge of the Serial Clock (C).
In the Extended SPI protocol, during the Quad and Dual Output Fast Read (QOFR, DOFR)
and the Quad and Dual Input/Output Fast Read (QIOFR, DIOFR) instructions, pin DQ0 is
also used as an input/output.
In the DIO-SPI protocol the DQ0 pin always acts as an input/output.
In the QIO-SPI protocol, the DQ0 pin always acts as an input/output, with the exception of
the Program or Erase cycle performed with the VPP. In this case the device temporarily
goes in Extended SPI protocol. Then, the protocol returns to QIO-SPI as soon as the VPP
pin voltage goes low.
2.3
Serial Clock (C)
This input signal provides the timing for the serial interface. Instructions, addresses, or data
present at serial data input (DQ0) are latched on the rising edge of Serial Clock (C). Data
are shifted out on the falling edge of the Serial Clock (C).
2.4
Chip Select (S)
When this input signal is high, the device is deselected and serial data output (DQ1) is at
high impedance. Unless an internal program, erase or write status register cycle is in
progress, the device will be in the standby power mode (this is not the deep power-down
mode). Driving Chip Select (S) low enables the device, placing it in the active power mode.
After power-up, a falling edge on Chip Select (S) is required prior to the start of any
instruction.


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