PM25LV010 查看數據表（PDF） - PMC-Sierra

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PM25LV010

512 Kbit / 1 Mbit 3.0 Volt-only, Serial Flash Memory With 25 MHz SPI Bus Interface

PMC-Sierra 

PMC

SERIAL INTERFACE DESCRIPTION (CONTINUED)

Pm25LV512/010

SPI MODES

These devices can be driven by microcontroller with its

SPI peripheral running in either of the two following modes:

Mode 0 = (0, 0)

Mode 3 = (1, 1)

For these two modes, input data is latched in on the

rising edge of Serial Clock (SCK), and output data is

available from the falling edge of Serial Clock (SCK).

The difference between the two modes, as shown in

Figure 2, is the clock polarity when the bus master is in

Stand-by mode and not transfering data:

- Clock remains at 0 (SCK = 0) for Mode 0 (0, 0)

- Clock remains at 1 (SCK = 1) for Mode 3 (1, 1)

Figure 2. SPI Modes

Mode 0 (0 0) SCK

Mode 3 (1 1) SCK

SI

SO

Programmable Microelectronics Corp.

6

Issue Date: December, 2003, Rev: 1.3

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