Datasheet

Appendix B Internal I/O Registers
Rev. 6.00 Aug 04, 2006 page 579 of 680
REJ09B0145-0600
SCR1—Serial Control Register 1 H'A0 SCI1
Bit
Initial value
Read/Write
7
SNC1
0
R/W
6
SNC0
0
R/W
5
MRKON
0
R/W
4
LTCH
0
R/W
3
CKS3
0
R/W
0
CKS0
0
R/W
2
CKS2
0
R/W
1
CKS1
0
R/W
Operating mode select
Clock source select
0 Clock source is prescaler S, SCK
1
is output pin
1 Clock source is external clock, SCK
1
is input pin
LATCH TAIL select
0 HOLD TAIL is output
1 LATCH TAIL is output
Tail mark control
0 Tail mark is not output (synchronous mode)
1 Tail mark is output (SSB mode)
0 8-bit synchronous mode
16-bit synchronous mode
1
0
1
0
1
Continuous clock output mode
Reserved
Clock select 2 to 0
Bit 2
CKS2
CKS1 CKS0
Bit 1 Bit 0
0 φ/1024
φ/256
1
1
0
φ/64
φ/321
φ/1610
1
1
0
0
1
φ/8
00
00
0
1
0
φ/41
1
1
0
1
φ
W
/4
φ = 2.5 MHz
409.6 µs
102.4 µs
25.6 µs
12.8 µs
6.4 µs
3.2 µs
1.6 µs
122 µs
Clock Cycle
Serial Clock Cycle
Prescaler
Division
Ratio