Table 6-3, Table 6-4 – Motorola MC68VZ328 User Manual

Page 93

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Programming Model

Chip-Select Logic

6-5

CSGBB

Chip-Select Group B Base Address Register

0x(FF)FFF102

CSGBC

Chip-Select Group C Base Address Register

0x(FF)FFF104

BIT

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

BIT

0

GB

B28

GB

B27

GB

B26

GB

B25

GB

B24

GB

B23

GB

B22

GB

B21

GB

B20

GB

B19

GB

B18

GB

B17

GB

B16

GB

B15

GB

B14

TYPE

rw

rw

rw

rw

rw

rw

rw

rw

rw

rw

rw

rw

rw

rw

rw

RESET

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0x0000

Table 6-3. Chip-Select Group B Base Address Register Description

Name Description

Setting

GBBx
Bits 15

1

Group B Base Address

These bits select

the high-order bits (28–14) of the starting
address for the chip-select range.

The chip-select base address must be set
according to the size of the corresponding
chip-select signals of the group.

Reserved
Bit 0

Reserved

This bit is reserved and should be set to 0.

BIT

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

BIT

0

GB

C2

8

GB

C2

7

GB

C2

6

GB

C2

5

GB

C2

4

GB

C2

3

GB

C2

2

GB

C2

1

GB

C2

0

GB

C1

9

GB

C1

8

GB

C1

7

GB

C1

6

GB

C1

5

GB

C1

4

TYPE

rw

rw

rw

rw

rw

rw

rw

rw

rw

rw

rw

rw

rw

rw

rw

RESET

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0x0000

Table 6-4. Chip-Select Group C Base Address Register Description

Name Description

Setting

GBCx
Bits 15–1

Group C Base Address—These bits select
the high-order bits (28–14) of the starting
address for the chip-select range.

The chip-select base address must be set
according to the size of the corresponding
chip-select signals of the group.

Reserved
Bit 0

Reserved

This bit is reserved and should be set to 0.

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