FUJITSU MB91F109 FR30 User Manual
Page 168
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CHAPTER 4 BUS INTERFACE
❍
16-bit bus width
Figure 4.16-8 External Bus Access for 16-bit Bus Width
MSB
LSB
00
01
00
01
00
01
10
11
10
11
10
11
16bit
00
01
00
01
00
01
10
11
10
11
10
11
00
01
00
01
00
01
10
11
10
11
10
11
00
01
10
11
00
01
10
11
00
01
10
11
PA1/PA0 : Lower 2 bits of address specified by program
Output A1/A0 : Lower 2 bits of output address
: First byte location of output address
: Data byte location for access
1) to 2) : Bus access count
(A) Word access
(B) Half-word access
(C) Byte access
Output
A1/A0='10'
Output
A1/A0='10'
Output
A1/A0='10'
Output
A1/A0='00'
Output
A1/A0='00'
Output
A1/A0='00'
Output
A1/A0='00'
Output
A1/A0='10'
(a) PA1/PA0='00'
(b) PA1/PA0='01'
(c) PA1/PA0='10'
(d) PA1/PA0='11'
(a) PA1/PA0='00'
(b) PA1/PA0='01'
(c) PA1/PA0='10'
(d) PA1/PA0='11'
Output
A1/A0='00'
Output
A1/A0='00'
Output
A1/A0='10'
Output
A1/A0='10'
(a) PA1/PA0='00'
(b) PA1/PA0='01'
(c) PA1/PA0='10'
(d) PA1/PA0='11'
Output
A1/A0='00'
Output
A1/A0='01'
Output
A1/A0='10'
Output
A1/A0='11'