HD6417660 RENESAS [Renesas Technology Corp], HD6417660 Datasheet - Page 486
HD6417660
Manufacturer Part Number
HD6417660
Description
Renesas 32-Bit RISC Microcomputer
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6417660.pdf
(846 pages)
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Rev. 1.00, 02/04, page 448 of 804
Bit
1
0
Bit Name
CKE1
CKE0
Initial
Value
0
0
R/W
R/W
R/W
Description
Clock Enable
Select the SCIF clock source. The CKE1 and CKE0 bits must
be set before determining the SCIF operating mode with
SCSMR.
00: Internal clock/SCK pin functions as input pin (input signal
01: Internal clock/SCK pin functions as serial clock output*
10: External clock/SCK pin functions as clock input*
11: External clock/SCK pin functions as clock input*
When data is sampled by the on-chip baud rate generator, set
bits CKE1 and CKE0 to B'00 (internal clock/SCK pin functions
as input pin (input signal ignored)).
When using the SCK pin as a port, set bits CKE1 and CKE0 to
B'00.
Notes: 1. In synchronous mode, a clock with a frequency
ignored)
2. In asynchronous mode, a clock with a sampling
equal to the bit rate is output.
rate should be input. For example, when the
sampling rate is 1/16, a clock with a frequency of 8
times the bit rate should be input. When an
external clock is not input, set bits CKE1 and
CKE0 to B'00 or B'01.
2
2
1
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