S25FL016A View Datasheet(PDF) - Spansion Inc.

Part Name

Description

Manufacturer

S25FL016A

16 Megabit CMOS 3.0 Volt Flash Memory with 50-MHz SPI (Serial Peripheral Interface) Bus

Spansion Inc. 

Data Sheet

6. Spansion SPI Modes

A microcontroller can use either of its two SPI modes to control Spansion SPI Flash memory devices:

„ CPOL = 0, CPHA = 0 (Mode 0)

„ CPOL = 1, CPHA = 1 (Mode 3)

Input data is latched in on the rising edge of SCK, and output data is available from the falling edge of SCK for

both modes.

When the bus master is in standby mode, SCK is as shown in Figure 6.2 for each of the two modes:

„ SCK remains at 0 for (CPOL = 0, CPHA = 0 Mode 0)

„ SCK remains at 1 for (CPOL = 1, CPHA = 1 Mode 3)

Figure 6.1 Bus Master and Memory Devices on the SPI Bus

SO

SPI Interface with

SI

(CPOL, CPHA) =

(0, 0) or (1, 1)

SCK

Bus Master

SCK SO SI

SCK SO SI

SCK SO SI

CS3 CS2 CS1

SPI Memory

Device

SPI Memory

Device

SPI Memory

Device

CS#

W# HOLD#

CS#

W# HOLD#

CS#

W# HOLD#

Note

The Write Protect (W#) and Hold (HOLD#) signals should be driven high (logic level 1) or low (logic level 0) as appropriate.

CS#

CPOL CPHA

Mode 0 0

0 SCK

Mode 3 1

1 SCK

SI

SO

Figure 6.2 SPI Modes Supported

MSB

MSB

January 7, 2008 S25FL016A_00_C3

S25FL016A

11

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