HD6417615 Hitachi Semiconductor, HD6417615 Datasheet - Page 278

• Manufacturer Part Number: HD6417615
• Description: Hardware Manual
• Manufacturer: Hitachi Semiconductor

Bits 5 and 4—Bus Size Specification for Area 2 (CS2) (A2SZ1, A2SZ0): Effective only when
ordinary space is set.
Bit 5: A2SZ1
0
1
Bits 3 and 2—Bus Size Specification for Area 1 (CS1) (A1SZ1, A1SZ0)
Bit 3: A1SZ1
0
1
Bits 1 and 0—Reserved: These bits are always read as 0. The write value should always be 0.
7.2.3
Initialize the BASEL, EDO, and BWE bits after a power-on reset and do not write to them
thereafter. To change other bits by writing to them, write the same value as they are initialized to.
Do not access any space other than CS0 until the register initialization ends.
Bits 15 to 12—Reserved bits: These bits are always read as 0. The write value should always be 0.
Bits 11 to 8—Long Wait Specification for Areas 0 to 4 (AnLW2): When the basic memory
interface setting is made for CS n, from 3 to 14 wait cycles are inserted in CS n accesses,
Initial value:
Initial value:
Bus Control Register 3 (BCR3)
R/W:
R/W:
Bit:
Bit:
Bit 4: A2SZ0
0
1
0
1
Bit 2: A1SZ0
0
1
0
1
DSWW1 DSWW0
R/W
15
—
0
R
7
0
R/W
14
—
0
R
6
0
Description
Reserved (do not set)
Byte (8-bit) size
Word (16-bit) size
Longword (32-bit) size
Description
Reserved (do not set)
Byte (8-bit) size
Word (16-bit) size
Longword (32-bit) size
13
—
—
0
R
5
0
R
12
—
—
0
R
4
0
R
A4LW2
R/W
11
—
1
3
0
R
AHLW2
BASEL
R/W
R/W
10
1
2
0
A1LW2
EDO
R/W
R/W
9
1
1
0
(Initial value)
(Initial value)
A0LW2
BWE
R/W
R/W
8
1
0
0
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