Datasheet

Table Of Contents
Section 18 Serial Communication Interface 4 (SCI4)
Rev. 2.00 Jul. 04, 2007 Page 420 of 692
REJ09B0309-0200
Table 18.2 shows a prescaler division ratio and transfer clock cycle.
Table 18.2 Prescaler Division Ratio and Transfer Clock Cycle (Internal Clock)
Bit 3 Bit 2 Bit 1 Bit 0 Transfer Clock Cycle Function
CKS3
CKS2
CKS1
CKS0
Prescaler
Division
Ratio
φ =
5 MHz
φ =
2.5 MHz
Clock
Source
Pin
Function
0 0 0 0 φ/1024 204.8 µs 409.6 µs Internal
clock
SCK4
output pin
0 0 0 1 φ/256 51.2 µs 102.4 µs Internal
clock
SCK4
output pin
0 0 1 0 φ/64 12.8 µs 25.6 µs Internal
clock
SCK4
output pin
0 0 1 1 φ/32 6.4 µs 12.8 µs Internal
clock
SCK4
output pin
0 1 0 0 φ/16 3.2 µs 6.4 µs Internal
clock
SCK4
output pin
0 1 0 1 φ/8 1.6 µs 3.2 µs Internal
clock
SCK4
output pin
0 1 1 0 φ/4 0.8 µs 1.6 µs Internal
clock
SCK4
output pin
0 1 1 1 φ/2 0.8 µs Internal
clock
SCK4
output pin
1 0 0 0 I/O port (initial value)
1 0 0 1 I/O port
1 0 1 0 I/O port
1 0 1 1 I/O port
1 1 0 0 I/O port
1 1 0 1 I/O port
1 1 1 0 I/O port
1 1 1 1 External
clock
SCK4 input
pin