Datasheet

Section 15 Serial Communication Interface (SCI)
Rev. 6.00 Mar. 18, 2010 Page 560 of 982
REJ09B0054-0600
Bit Bit Name
Initial
Value R/W Description
1
0
CKE1
CKE0
0
0
R/W
R/W
Clock Enable 0 and 1
Selects the clock source and SCK pin function.
Asynchronous mode
00: On-chip baud rate generator
SCK pin functions as I/O port
01: On-chip baud rate generator
Outputs a clock of the same frequency as the
bit rate from the SCK pin.
1×: External clock
Inputs a clock with a frequency 16 times the bit
rate from the SCK pin.
Clocked synchronous mode
0×: Internal clock (SCK pin functions as clock
output)
1×: External clock (SCK pin functions as clock
input)
Legend:
×: Don’t care