3V 1M-BIT [x 1/x 2] CMOS SERIAL FLASH
Current photos are a but too grainy, but there are 2 of these on the board. One near the SATA on the back of the board (colored blue @ ifixit) and one near the front USB.
|Pin||1x I/O||2x I/O||Description|
|2||SO||SIO1||Serial Data Output (for 1 x I/O) or Serial Data Input & Output (for 2x I/O)|
|3||WP#||WP#||Write Protection: connect to GND|
|5||SI||SIO0||Serial Data Input (for 1 x I/O) or Serial Data Input & Output (for 2x I/O)|
|7||HOLD#||HOLD#||Hold, to pause the device without deselecting the device|
|8||VCC||VCCS||+3V DC Power Supply|