Motorola MC68VZ328 用户手册
DRAM Controller Operation
DRAM Controller
7-5
Table 7-2 through Table 7-5 on page 7-6 provide recommendations for MC68VZ328–to–SDRAM
connections and for selecting multiplexing options for different types of SDRAM.
connections and for selecting multiplexing options for different types of SDRAM.
Table 7-2. 16 Mbit SDRAM—256 (16-Bit) and 512 (8-Bit) Page Size
SDRAM
Pins
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
BS
VZ Pins
A1/
MD0
A2/
MD1
A3/
MD2
A4/
MD3
A5/
MD4
A6/
MD5
A7/
MD6
A8/
MD7
A9/
MD8
A10/
MD9
MD9
A11/
MD10
A12/
MD11
Row
Address
Options
PA11
PA12
PA13
PA14
PA15
PA16
PA17
PA18
PA10
PA9
PA19
PA20
Column
Address
Options
(16-Bit)
PA1
PA2
PA3
PA4
PA5
PA6
PA7
PA8
X
X
0
PA20
Column
Address
Options
(8-Bit)
PA0
PA2
PA3
PA4
PA5
PA6
PA7
PA8
PA1
X
0
PA20
Note:
X = “don’t care”
Table 7-3. 64 Mbit SDRAM—256 (16-Bit) and 512 (8-Bit) Page Size
SDRAM
Pins
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
BS0
BS1
VZ Pins
A1/
MD
MD
0
A2/
MD
MD
1
A3/
MD
MD
2
A4/
MD
MD
3
A5/
MD
MD
4
A6/
MD
MD
5
A7/
MD
MD
6
A8/
MD
MD
7
A9/
MD
MD
8
A10
/MD
/MD
9
A11
/MD
/MD
10
A12
/MD
/MD
11
A13/
MD
12
A14/
MD
13
Row
Address
Options
PA
11
PA
12
PA
13
PA
14
PA
15
PA
16
PA
17
PA
18
PA
10
PA
9
PA
19
PA
20
PA21
PA22
Column
Address
Options
(16-Bit)
PA
1
PA
2
PA
3
PA
4
PA
5
PA
6
PA
7
PA
8
X
X
0
X
PA21
PA22
Column
Address
Options
(8-Bit)
PA
0
PA
2
PA
3
PA
4
PA
5
PA
6
PA
7
PA
8
PA
1
X
0
X
PA21
PA22
Note:
X = “don’t care”