HD6473887 Datasheet, PDF (445/523 Pages) Renesas Technology Corp – Hitachi Single-Chip Microcomputer

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
2
CKS2
0
R/W
1
CKS1
0
R/W
0
CKS0
0
R/W
Clock select 2 to 0
Prescaler ^{Serial Clock Cycle}
Bit 2 Bit 1 Bit 0 _Division
Clock Cycle
CKS2 CKS1 CKS0 Ratio
ø = 2.5 MHz
0
0
0 ø/1024 409.6 µs
0
0
1 ø/256
102.4 µs
0
1
0 ø/64
25.6 µs
0
1
1 ø/32
12.8 µs
1
0
0 ø/16
6.4 µs
1
0
1 ø/8
3.2 µs
1
1
0 ø/4
1.6 µs
1
1
1 ø_W/4
122 µs
Clock source select
0 Clock source is prescaler S, SCK₁ is output pin
1 Clock source is external clock, SCK₁ 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)
Operating mode select
0 0 8-bit synchronous mode
1 16-bit synchronous mode
1 0 Continuous clock output mode
1 Reserved
428