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272
Chapter 7
Bus and Memory Control (BCU, MEMC)
Preliminary User’s Manual U17566EE1V2UM00
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LBS - Local bus size configuration register
The 16-bit LBS register controls the data bus width for each chip select area.
Access
This register can be read/written in 16-bit units.
Address
FFFF F48E
H
Initial Value
AAAA
H
.
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
LB71 LB70 LB61 LB60 LB51 LB50 LB41 LB40 LB31 LB30 LB21 LB20 LB11 LB10 LB01 LB00
CS7
CS6
CS5
CS4
CS3
CS2
CS1
CS0
Table 7-19
LBS register contents
Bit position
Bit name
Function
15 to 0
LBk[1:0]
Sets the data bus width for each chip select area.
LBk1
LBk0
Data bus size
0
0
8 bit
0
1
16 bit
1
0
32 bit
1
1
prohibited
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