Datasheet

Section 13 Serial Communication Interface (SCI)
Rev. 3.00 Sep. 28, 2009 Page 260 of 710
REJ09B0384-0300
Bit Bit Name
Initial
Value R/W Description
1
0
CKE1
CKE0
0
0
R/W
R/W
Clock Enable 1 and 0
These bits select the clock source and SCK pin function.
Asynchronous mode:
00: Internal clock
(SCK pin functions as I/O port.)
01: Internal clock
(Outputs a clock of the same frequency as the bit rate
from the SCK pin.)
1x: External clock
(Inputs a clock with a frequency 16 times the bit rate
from the SCK pin.)
Clock synchronous mode:
0x: Internal clock (SCK pin functions as clock output.)
1x: External clock (SCK pin functions as clock input.)
[Legend]
x: Don't care