HD6417750RF240V Datasheet, PDF (358/606 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2600 Series

Section 14 Serial Communication Interface (SCI)
Bit Bit Name Initial Value R/W
1
CKE1
0
R/W
0
CKE0
0
R/W
Legend:
X: Don’t care
Description
Clock Enable 0 and 1
Selects 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.
Clocked synchronous mode
0X: Internal clock (SCK pin functions as clock output)
1X: External clock (SCK pin functions as clock input)
Rev. 7.00 Sep. 11, 2009 Page 322 of 566
REJ09B0211-0700