Fujitsu MB91460 SERIES FR60 User Manual page 564

Chapter 31 External Bus
4.Endian and Bus Access
● 8-bit bus width
(A) Word access
(a) PA1/PA0="00"
(1) Output A1/A0="00"
(2) Output A1/A0="01"
(3) Output 1/A0="10"
(4) Output 1/A0="11"
MSB LSB
00
(1)
01
(2)
(3) 10
(4)
11
8bit
(B) Halfword access
(a) PA1/PA0="00"
(1) Output A1/A0="00"
(2) Output A1/A0="01"
00
(1)
01
(2)
10
11
(C) Byte access
(a) PA1/PA0="00"
(1) Output A1/A0="00"
00
(1)
01
10
11
■ Example of Connection with External Devices
Figure 4-13 "Example of Connecting the MB91460 Series to External Devices" shows an example of connection
the MB91460 series to external devices.
548
Figure 4-12 External Bus Access for 8-Bit Bus Width
(b) PA1/PA0="01"
(1) Output A1/A0="00"
(2) Output A1/A0="01"
(3) Output 1/A0="10"
(4) Output 1/A0="11"
00
(1)
01
(2)
(3) 10
(4)
11
(b) PA1/PA0="01"
(1) Output A1/A0="00"
(2) Output A1/A0="01"
00
(1)
01
(2)
10
11
(b) PA1/PA0="01"
(1) Output A1/A0="00"
00
01
(1)
10
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"
00
(1)
01
(2)
(3) 10
(4)
11
(c) PA1/PA0="10"
(1) Output A1/A0="10"
(2) Output A1/A0="11"
00
01
10
(1)
11
(2)
(c) PA1/PA0="10"
(1) Output A1/A0="10"
00
01
10
(1)
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"
00
(1)
01
(2)
(3) 10
(4)
11
(d) PA1/PA0="11"
(1) Output A1/A0="10"
(2) Output A1/A0="11"
00
01
10
(1)
11
(2)
(d) PA1/PA0="11"
(1) Output A1/A0="10"
00
01
10
11
(1)