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CHAPTER 4 BUS INTERFACE
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Example of Connection to External Devices
❍
16-bit bus width
Figure 4.16-16 Example of Connection between MB91F109 and External Devices (16-Bit Bus Width)
❍
8-bit bus width
Figure 4.16-17 Example of Connection between MB91F109 and External Devices (8-Bit Bus Width)
MB91F109 CSnX
CSmX
WW
D31 R D23 R
0 1
D24 X D16 X
Big endian area Little endian area
WR0X WR1X WR1X WR0X
D31-24 D23-16 D23-16 D31-24
MSB LSB MSB LSB
D15 D08D07 D00 D15 D08D07 D00
MB91F109 CSnX
CSmX
WW
D31 R D23 R
0 1
D24 X D16 X
Big endian area Little endian area
D07 D00 D07 D00