HD6433832S Datasheet, PDF (486/560 Pages) Renesas Technology Corp – single-chip microcomputers

SCR1—Serial control register 1
Bit
Initial value
Read/Write
7
6
5
SNC1 SNC0 —
0
0
0
R/W
R/W
R/W
H'A0
SCI1
4
3
2
1
0
— CKS3 CKS2 CKS1 CKS0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
Clock Select (CKS2 to CKS0)
Bit 2 Bit 1 Bit 0 _Prescaler
CKS2 CKS1 CKS0 Division
0
0
0 φ /1024
1 φ /256
1
0 φ /64
1 φ /32
1
0
0 φ /16
1 φ /8
1
0 φ /4
1 φ /2
Serial Clock Cycle
Synchronous
φ = 5 MHz φ = 2.5 MHz
204.8 µs 409.6 µs
51.2 µs
102.4 µs
12.8 µs
25.6 µs
6.4 µs
12.8 µs
3.2 µs
6.4 µs
1.6 µs
3.2 µs
0.8 µs
1.6 µs
—
0.8 µs
Clock source select
0 Clock source is prescaler S, and pin SCK ₁ is output pin
1 Clock source is external clock, and pin SCK₁ is input pin
Operation mode select
0 0 8-bit synchronous transfer mode
1 16-bit synchronous transfer mode
1 0 Continuous clock output mode
1 Reserved
471