Fujitsu MB91360 SERIES Manuel de l'utilisateur - Page 8
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2 Installation
2.1 Using of the header board for extended bus interface at 3v level
2.1.1 Using of new header board MB2197-127-3V3
For the extended bus interface at 3v level we using the new header board
MB2197-127-3V3, designed with separately 3v and 5v power supply lines.
2.1.2 Using of modified header board MB2197-127
If VDD pins 25,51,182 and 198 are connected to 3.3v and VDD-pins 79,82,144,160 and 118
to 5v externally the external bus interface can be normally operated at 3.3v.
Please note that the Eva-chip MB91V360 doesn't support the external bus interface at 3.3v
levels.
The Level-Shifter board is designed to convert 5v to 3.3v bus interface for this.
The problem is yet, that the various VDD-pin (3.3v and 5v) are connected on the header
board. Therefore, we have to cut the 3.3v pins 25,51,182 and 198 on the pin header of the
header board MB2197-127.
Figure 3: Modification of Pin-Header Board MB2197-127
UG-910005-24
LEVELSHIFTER BOARD
Chapter 2 Installation
105
156
104
157
182
198
208
51
25
53
52
1
Pin Header
MB2197-127
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