Datasheet

Rev. 3.00, 03/04, page 377 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
Asynchronous Mode Clock Source Select
Specify the clock source and the average transfer rate
in asynchronous mode. These bits are valid only when
external clock is supplied in asynchronous mode.
0000: Normal operation with external clock input and
average transfer rate operation not used
(operated using the basic clock with a frequency
16 or 8 times the transfer clock frequency)
0001: Average transfer rate operation at 115.152 kbps
when the system clock frequency is 10.667 MHz
(operated using the basic clock with a frequency
16 times the transfer clock frequency)
0010: Average transfer rate operation at 460.606 kbps
when the system clock frequency is 10.667 MHz
(operated using the basic clock with a frequency
8 times the transfer clock frequency)
0011: Average transfer rate operation at 720 kbps when
the system clock frequency is 32 MHz (operated
using the basic clock with a frequency 16 times
the transfer clock frequency)
0100: Reserved
0101: Average transfer rate operation at 115.196 kbps
when the system clock frequency is 16 MHz
(operated using the basic clock with a frequency
16 times the transfer clock frequency)
0110: Average transfer rate operation at 460.784 kbps
when the system clock frequency is 16 MHz
(operated using the basic clock with a frequency
16 times the transfer clock frequency)
0111: Average transfer rate operation at 720 kbps when
the system clock frequency is 16 MHz (operated
using the basic clock with a frequency 8 times the
transfer clock frequency)
1000: Average transfer rate operation at 115.196 kbps
when the system clock frequency is 16 MHz
(operated using the basic clock with a frequency
16 times the transfer clock frequency)
1001: Average transfer rate operation at 230.392 kbps
when the system clock frequency is 16 MHz
(operated using the basic clock with a frequency
16 times the transfer clock frequency)