Datasheet

Section 20 Serial Communication Interface 3 (SCI3, IrDA)
REJ09B0465-0300 Rev. 3.00 Page 687 of 982
Sep 17, 2010
H8S/20103, H8S/20203, H8S/20223, H8S/20115, H8S/20215, H8S/20235 Group
Bit Symbol Bit Name Description R/W
1, 0 CKE[1:0] Clock enable 0
and 1
Selects the clock source.
Asynchronous mode:
00: On-chip baud rate generator
01: On-chip baud rate generator
Outputs a clock of the same frequency as the bit rate
from the SCK3 pin.
10: External clock
A clock with a frequency 16 times the bit rate should
be input from the SCK3 pin.
11:Reserved
Clocked synchronous mode:
00: On-chip clock (The SCK3 pin functions as clock
output.)
01: Reserved
10: External clock (The SCK3 pin functions as clock
input.)
11: Reserved
R/W
Notes: 1. The TE and RE bits are reset and the other bits are retained when (module) standby
mode is entered.
2. For details on interrupt requests, see section 20.8, Interrupt Requests.