Datasheet

Section 14 Serial Communication Interface (SCI, IrDA)
Rev.6.00 Mar. 18, 2009 Page 553 of 980
REJ09B0050-0600
Bit Bit Name Initial Value R/W Description
1
0
CKE1
CKE0
0
0
R/W
R/W
Clock Enable 1 and 0
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