HD64F2168 Datasheet, PDF (418/874 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer

Bit Bit Name Initial Value R/W Description
4
ACS4
0
2
ACS2
0
1
ACS1
0
0
ACS0
0
R/W 1010: Average transfer rate operation at 115.196 kbps
R/W
when the system clock frequency is 20 MHz
R/W
(operated using the basic clock with a frequency
R/W
16 times the transfer clock frequency)
1011: Average transfer rate operation at 230.392 kbps
when the system clock frequency is 20 MHz
(operated using the basic clock with a frequency
16 times the transfer clock frequency)
1100: Average transfer rate operation at 115.196 kbps
when the system clock frequency is 24 MHz
(operated using the basic clock with a frequency
16 times the transfer clock frequency)
1101: Average transfer rate operation at 230.392 kbps
when the system clock frequency is 24 MHz
(operated using the basic clock with a frequency
16 times the transfer clock frequency)
1110: Average transfer rate operation at 460.784 kbps
when the system clock frequency is 24 MHz
(operated using the basic clock with a frequency
16 times the transfer clock frequency)
1111: Average transfer rate operation at 720 kbps when
the system clock frequency is 24 MHz (operated
using the basic clock with a frequency 8 times the
transfer clock frequency)
Table 14.10 Asynchronous Mode Clock Source Select
Average
ACS 4 ACS 2 ACS 1 ACS 0 Transfer Rate
0
0
0
0
None
0
0
0
1
115.152 kbps
0
0
1
0
460.606 kbps
0
0
1
1
Reserved
0
1
0
0
Reserved
0
1
0
1
115.196 kbps
0
1
1
0
460.784 kbps
0
1
1
1
720 kbps
1
0
0
0
115.196 kbps
1
0
0
1
230.392 kbps
1
0
1
0
115.196 kbps
System Clock (φ)
External clock input,
normal operation
10.667 MHz
10.667 MHz
Reserved
Reserved
16 MHz
16 MHz
16 MHz
16 MHz
16 MHz
20 MHz
Operating Clock
Transfer rate × 16 or
Transfer rate × 8
Transfer rate × 16
Transfer rate × 8
Reserved
Reserved
Transfer rate × 16
Transfer rate × 16
Transfer rate × 8
Transfer rate × 16
Transfer rate × 16
Transfer rate × 16
Rev. 3.00, 03/04, page 378 of 830