Bit bus width, Figure 4-12, External – FUJITSU MB91460 SERIES FR60 User Manual
Page 564: Example of connection with external devices, A) word access (b) halfword access (c) byte access
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Chapter 31 External Bus
4.Endian and Bus Access
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8-bit bus width
Figure 4-12 External Bus Access for 8-Bit Bus Width
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Example of Connection with External Devices
"Example of Connecting the MB91460 Series to External Devices" shows an example of connection
the MB91460 series to external devices.
11
10
01
00
11
10
01
00
11
10
01
00
11
10
01
00
(a) PA1/PA0="00"
(1) Output A1/A0="00"
(b) PA1/PA0="01"
(1) Output A1/A0="00"
(c) PA1/PA0="10"
(1) Output A1/A0="10"
(d) PA1/PA0="11"
(1) Output A1/A0="10"
(1)
(1)
(1)
(1)
LSB
MSB
11
10
01
(1)
(2)
(3)
(4)
(1)
(2)
(3)
(4)
(1)
(2)
(3)
(4)
(1)
(2)
(3)
(4)
8bit
00
11
10
01
00
11
10
01
00
11
10
01
00
(a) PA1/PA0="00"
(1) Output A1/A0="00"
(2) Output A1/A0="01"
(3) Output 1/A0="10"
(4) Output 1/A0="11"
(b) PA1/PA0="01"
(1) Output A1/A0="00"
(2) Output A1/A0="01"
(3) Output 1/A0="10"
(4) Output 1/A0="11"
(c) PA1/PA0="10"
(1) Output A1/A0="00"
(2) Output A1/A0="01"
(3) Output 1/A0="10"
(4) Output 1/A0="11"
(d) PA1/PA0="11"
(1) Output A1/A0="00"
(2) Output A1/A0="01"
(3) Output 1/A0="10"
(4) Output 1/A0="11"
(A) Word access
(B) Halfword access
(C) Byte access
11
10
01
00
11
10
01
00
11
10
01
00
11
10
01
00
(a) PA1/PA0="00"
(1) Output A1/A0="00"
(2) Output A1/A0="01"
(b) PA1/PA0="01"
(1) Output A1/A0="00"
(2) Output A1/A0="01"
(c) PA1/PA0="10"
(1) Output A1/A0="10"
(2) Output A1/A0="11"
(d) PA1/PA0="11"
(1) Output A1/A0="10"
(2) Output A1/A0="11"
(1)
(2)
(1)
(2)
(1)
(2)
(1)
(2)