HD6417641 RENESAS [Renesas Technology Corp], HD6417641 Datasheet - Page 748
HD6417641
Manufacturer Part Number
HD6417641
Description
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
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Section 19 Serial Communication Interface with FIFO (SCIF)
Rev. 4.00 Sep. 14, 2005 Page 698 of 982
REJ09B0023-0400
Bit
2
1
0
Bit Name
CKE1
CKE0
Initial
value
0
0
0
R/W
R
R/W
R/W
Description
Reserved
This bit is always read as 0. The write value should
always be 0.
Clock Enable 1, 0
Select the SCIF clock source and enable or disable
clock output from the SCK pin. Depending on the
combination of CKE1 and CKE0, the SCK pin can be
used for serial clock output or serial clock input.
If the serial clock output is set in synchronous mode,
the communication mode bit (C/A) in SCSMR2 is set to
1, and then CKE1 and CKE0 bits are set.
•
00: Internal clock, SCK pin used for input pin (input
01: Internal clock, SCK pin used for clock output
10: External clock, SCK pin used for clock input
11: Setting prohibited
•
00: Internal clock, SCK pin used for serial clock output
01: Internal clock, SCK pin used for serial clock output
10: External clock, SCK pin used for serial clock input
11: Setting prohibited
Asynchronous mode
Synchronous mode
signal is ignored)
(The output clock frequency is 16 times the bit rate.)
(The input clock frequency is 16 times the bit rate.)
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