© 2006 Fairchild Semiconductor Corporation

www.fairchildsemi.com

FIN324C Rev. 1.0.5

4

Serial I/O Signals Normal Functionality

CKS+(DS+)

CKS-(DS-)

Diff

Serial

I/O

2

Bi-directional serial I/O

CKS+/CKS- when M/S=1

DS+/DS- when M/S=0

DS+(CKS+)

DS-(CKS-)

Diff

Serial

I/O

2

Bi-directional serial I/O

DS+/DS- when M/S=1

CKS+/CKS- when M/S=0

Supply Signals

VDDP

Supply

1

Power supply for parallel I/O and internal circuitry.

VDDS

Supply

1

Power supply for serial I/O.

VDDA

Supply

1

Power supply for internal bit clock generator.

GND

Supply

2

Ground Pins:

BGA - C1, D2, E3;

MLP - center pad, 12

Notes:

1.

() Indicate the operation of the pin when operating as a slave device. {} Indicate SPI Mode functionality. ({}) Slave

Mode and SPI mode functionality except as noted.

2.

Serial I/O signals are swapped on the slave so system traces do not have to cross between master and slave.