Datasheet

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