D12320VF25IV Datasheet, PDF (642/1304 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 14 Serial Communication Interface (SCI)
For details of clock source selection, see table 14.9.
Bit 1
CKE1
0
Bit 0
CKE0
0
Description
Asynchronous mode
Internal clock/SCK pin functions as I/O port^*1
Synchronous mode
Internal clock/SCK pin functions as serial clock
output
1
Asynchronous mode
Internal clock/SCK pin functions as clock output^*2
Synchronous mode
Internal clock/SCK pin functions as serial clock
output
1
0
Asynchronous mode
External clock/SCK pin functions as clock input^*3
Synchronous mode
External clock/SCK pin functions as serial clock
input
1
Asynchronous mode
External clock/SCK pin functions as clock input^*3
Synchronous mode
External clock/SCK pin functions as serial clock
input
Notes: 1. Initial value
2. Outputs a clock of the same frequency as the bit rate.
3. Inputs a clock with a frequency 16 times the bit rate.
Rev.6.00 Sep. 27, 2007 Page 610 of 1268
REJ09B0220-0600