Intel E3815 FH8065301567411 Data Sheet

 

Intel

®

 Atom™ Processor E3800 Product Family

Datasheet

4377

The SPI controller has a Write Protection Disable (BCR.WPD) configuration bit. When 
BCR.WPD=0b, BIOS is not able to perform any write or erase commands to the Flash. 
When BCR.WPD=1b, protection against BIOS erase and rewrite is disabled. When the 
lock enable (BCR.LE) bit is set, the BIOS can disable this protection only during System 
Management Mode (SMM) execution.

If BCR.LE=1b, the SPI controller confirms that only SMM code succeeds to set 
BCR.WPD=1b. In addition, if BCS.SMIWPEN=1b, the SPI controller should initiate an 
SMI when non SMM code tries to set BCR.WPD=1b.

This table contains the recommended serial Flash device pin-out for an 8-pin device. 
Use of the recommended pin-out on an 8-pin device reduces complexities involved with 
designing the serial Flash device onto a motherboard and allows for support of a 
common footprint usage model (refer to 

).

Although an 8-pin device is preferred over a 16-pin device due to footprint 
compatibility, 

 contains the recommended serial Flash device pin-out for a 16-

pin SOIC.

1

Chips  Select

2

Data Output

3

Write Protect

4

Ground

5

Data Input

6

Serial  Clock

7

Hold  /  Reset

8

Supply Voltage

1

Hold / Reset

9

Write Protect

2

Supply Voltage

10

Ground

3

No Connect

11

No Connect

4

No Connect

12

No Connect

5

No Connect

13

No Connect