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參數資料
型號: MC68332AVFC16
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 32-Bit Modular Microcontroller
中文描述: 32-BIT, 16.78 MHz, MICROCONTROLLER, PQFP132
封裝: PLASTIC, QFP-132
文件頁數: 33/88頁
文件大小: 446K
代理商: MC68332AVFC16
MC68332
MC68332TS/D
MOTOROLA
33
3.5.3 Base Address Registers
A base address is the starting address for the block enabled by a given chip select. Block size deter-
mines the extent of the block above the base address. Each chip select has an associated base register
so that an efficient address map can be constructed for each application. If a chip-select base address
register is programmed with the same address as a microcontroller module or memory array, an access
to that address goes to the module or array and the chip-select signal is not asserted.
ADDR[23:11] — Base Address Field
This field sets the starting address of a particular address space. The address compare logic uses only
the most significant bits to match an address within a block. The value of the base address must be a
multiple of block size. Base address register diagrams show how base register bits correspond to ad-
dress lines.
BLKSZ — Block Size Field
This field determines the size of the block that must be enabled by the chip select. The following table
shows bit encoding for the base address registers block size field.
3.5.4 Option Registers
The option registers contain eight fields that determine timing of and conditions for assertion of chip-
select signals. For a chip-select signal to be asserted, all bits in the base address register must match
the corresponding internal upper address lines, and all conditions specified in the option register must
be satisfied. These conditions also apply to providing DSACK or autovector support.
CSBARBT
— Chip-Select Base Address Register Boot ROM
$YFFA48
15
14
13
12
11
10
9
8
7
6
5
4
3
2
0
ADDR
23
ADDR
22
ADDR
21
ADDR
20
ADDR
19
ADDR
18
ADDR
17
ADDR
16
ADDR
15
ADDR
14
ADDR
13
ADDR
12
ADDR
11
BLKSZ
RESET:
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
CSBAR[10:0]
—Chip-Select Base Address Registers
$YFFA4C–$YFFA74
15
14
13
12
11
10
9
8
7
6
5
4
3
2
0
ADDR
23
ADDR
22
ADDR
21
ADDR
20
ADDR
19
ADDR
18
ADDR
17
ADDR
16
ADDR
15
ADDR
14
ADDR
13
ADDR
12
ADDR
11
BLKSZ
RESET:
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Block Size Field
000
001
010
011
100
101
110
111
Block Size
2 K
8 K
16 K
64 K
128 K
256 K
512 K
1 M
Address Lines Compared
ADDR[23:11]
ADDR[23:13]
ADDR[23:14]
ADDR[23:16]
ADDR[23:17]
ADDR[23:18]
ADDR[23:19]
ADDR[23:20]
相關PDF資料
PDF描述
MC68332CFC16 32-Bit Modular Microcontroller
MC68332CFC20 32-Bit Modular Microcontroller
MC68332MFC16 32-Bit Modular Microcontroller
MC68332MFC20 32-Bit Modular Microcontroller
MC68332TS 32-Bit Modular Microcontroller
相關代理商/技術參數
參數描述
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MC68332AVFV16 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:32-Bit Modular Microcontroller
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MC68332CFC16 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:32-Bit Modular Microcontroller
MC68332CFC20 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:32-Bit Modular Microcontroller
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