Atmel SAM4L Xplained Pro Starter Kit Atmel ATSAM4L-XSTK ATSAM4L-XSTK 데이터 시트

제품 코드

ATSAM4L-XSTK

118

42023E–SAM–07/2013

ATSAM4L8/L4/L2

10.7.3

PBx Clock Select

Name: PBxSEL

Access Type:

Read/Write

Offset: 0x00C-0x018

Reset Value:

0x00000000

• PBDIV, PBSEL: PBx Division and Clock Select

PBDIV = 0: APBx clock equals main clock.

PBDIV = 1: APBx clock equals main clock divided by 2

(PBSEL+1)

Note that if PBDIV is written to 0, PBSEL should also be written to 0 to ensure correct operation.

Also note that writing this register clears SR.CKRDY. The register must not be re-written until SR.CKRDY goes high.

Note that this register is protected by a lock. To write to this register the UNLOCK register has to be written first. Refer to

for details.

PBDIV

PBSEL