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參數資料
型號: MC68CK338
廠商: Motorola, Inc.
元件分類: 32位微控制器
英文描述: Highly Integrated, Low-Power, 32-Bit Microcontroller
中文描述: 高度集成,低功耗,32位微控制器
文件頁數: 35/133頁
文件大小: 798K
代理商: MC68CK338
MC68CK338
MC68CK338TS/D
MOTOROLA
35
ADDR[23:11] — Base Address Field
This field sets the starting address of a particular chip-select’s address space. The address compare
logic uses only the most significant bits to match an address within a block. The value of the base ad-
dress must be a multiple of the block size. The base address register diagrams above show how register
bits correspond to CPU address lines.
BLKSZ[2:0] — Block Size Field
This field determines the size of the block that must be enabled by the chip-select.
Table 23
shows bit
encoding for the base address registers block size field.
3.6.4 Option Registers
The option registers contain eight fields that determine timing of and conditions for assertion of chip-
select signals. To assert a chip-select signal, and to provide DSACK or autovector support, other con-
straints set by fields in the option register and in the base address register must also be satisfied.
CSBAR[0:10] —
Chip-Select Base Address Registers
$YFFA4C–$YFFA74
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
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[2:0]
RESET:
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Table 23 Block Size Field Bit Encoding
Block Size
Field
000
001
010
011
100
101
110
111
Block Size
Address Lines Compared
2 Kbyte
8 Kbyte
16 Kbyte
64 Kbyte
128 Kbyte
256 Kbyte
512 Kbyte
1 Mbyte
ADDR[23:11]
ADDR[23:13]
ADDR[23:14]
ADDR[23:16]
ADDR[23:17]
ADDR[23:18]
ADDR[23:19]
ADDR[23:20]
CSORBT —
Chip-Select Option Register Boot ROM
$YFFA4A
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
MODE
BYTE[1:0]
R/
W
[1:0]
STRB
DSACK[3:0]
SPACE[1:0]
IPL[2:0]
AVEC
RESET:
0
1
1
1
1
0
1
1
0
1
1
1
0
0
0
0
CSOR[0:10] —
Chip-Select Option Registers
$YFFA4E–YFFA76
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
MODE
BYTE[1:0]
R/
W
[1:0]
STRB
DSACK[3:0]
SPACE[1:0]
IPL[2:0]
AVEC
RESET:
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
相關PDF資料
PDF描述
MC68EC060 32-Bit Microprocessors.(32位微處理器)
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MC68EN360CFE25 QUad Integrated Communications Controller Users Manual
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MC68EN360FE25V QUad Integrated Communications Controller Users Manual
相關代理商/技術參數
參數描述
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