Fujitsu FR20 Home Theater Server User Manual


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101
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Width of bus of 16 bits
Figure 4.6-6 External bus access on 16-bit bus width
(A) Word access
MSB LSB
00 01 00 01 00 01 00 01
10 11 10 11 10 11 10 11
16bit
(B) Halfword access
00 01 00 01 00 01 00 01
10 11 10 11 10 11 10 11
(B) Byte access
00 01 00 01 00 01 00 01
10 11 10 11 10 11 10 11
2) Output A1/A0='10'
1) Output A1/A0='00'
(a) PA1/PA0='00'
2) Output A1/A0='10'
1) Output A1/A0='00'
(b) PA1/PA0='01'
2) Output A1/A0='10'
1) Output A1/A0='00'
(b) PA1/PA0='10'
2) Output A1/A0='10'
1) Output A1/A0='00'
(b) PA1/PA0='11'
(a) PA1/PA0='00'
(b) PA1/PA0='01'
(c) PA1/PA0='10'
(d) PA1/PA0='11'
(a) PA1/PA0='00' (b) PA1/PA0='01' (b) PA1/PA0='10' (d) PA1/PA0='11'
1) Output A1/A0='10'
1) Output A1/A0='10'
1) Output A1/A0='00'
1) Output A1/A0='00'
1) Output A1/A0='00' 1) Output A1/A0='01'
1) Output A1/A0='10'
1) Output A1/A0='11'
MSB LSB
MSB LSB
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