Motorola MVME5100 사용자 설명서
Programming Model
http://www.motorola.com/computer/literature
3-59
3
rom b we
When rom b we is set, writes to Block B ROM/Flash are
enabled. When rom b we is cleared, they are disabled.
Refer back to
enabled. When rom b we is cleared, they are disabled.
Refer back to
for more details.
ROM Speed Attributes Registers
rom_a_spd0,1
rom_a_spd0,1 determine the access timing used for
ROM/Flash Block A. The encoding of these bits are
shown in
ROM/Flash Block A. The encoding of these bits are
shown in
.
The device access times shown in the table are
conservative and allow time for buffers on address,
control, and data signals. For more accurate information
see the section entitled Timing Specifications for
ROM/Flash Signals further on in this manual, along with
the section titled ROM/Flash Read Timing Diagram.
conservative and allow time for buffers on address,
control, and data signals. For more accurate information
see the section entitled Timing Specifications for
ROM/Flash Signals further on in this manual, along with
the section titled ROM/Flash Read Timing Diagram.
Address
$FEF80060
Bit
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
Name
0
0
ro
m a sp
d
0
ro
m a sp
d
1
0
0
ro
m b
sp
d
0
ro
m b
sp
d
1
Operation
READ ZERO
READ ZERO
READ ZERO
R
R
R/W
R/W
R
R
R/W
R/W
Reset
X
X
X
X
X
0 P
L
0 P
L
X
X
0 P
L
0 P
L