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參數(shù)資料
| 型號： | W6692ACD |
| 英文描述： | ISDN LINE INTERFACE|BASIC|CMOS|QFP|100PIN|PLASTIC |
| 中文描述： | 綜合業(yè)務數(shù)字網(wǎng)線接口|基本|的CMOS | QFP封裝| 100引腳|塑料 |
| 文件頁數(shù)： | 84/101頁 |
| 文件大小： | 851K |
| 代理商： | W6692ACD |
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W6692A
- 84 -
8.4.5 Base Address Register 0 Read/Write
Address 10
H
Depending on EEPROM status and MEN, IEN bits in EEPROM, there are different implementations:
MEN
1
1
0
0
EEPROM empty
IEN
1
0
1
0
Location 10H
Memory Base Address Reg. IO Base Address Reg.
Memory Base Address Reg. Not Implemented
IO Base Address Reg.
Not Implemented
Memory Base Address Reg. IO Base Address Reg.
Location 14H
PRE used
Yes
Yes
No
No
PRE = 0
Not Implemented
Not Implemented
If EEPROM is empty, the power on reset value at 10
H
=0000 0000
H
, and the power on reset value at
14
H
= 0000 0001
H
Memory Base Adress Register:
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
Memory Base Address
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Memory Base Address
Hardwired to 0
PRE
Type
0
This register can be used to relocate memory address space to any location that is aligned to 4K
bytes for mapping W6692A's internal registers.
Bits 31-12 Memory Base Address R/W
These bits are read/write and are used to relocate the memory address space at 4K byte boundary.
Bits 11-4 Read_only
These bits are read_only and are hardwired to 0
.
Bit 3 Prefetchable Read_only
This bit is hardwired to 0 if EEPROM is empty. Otherwise, it is loaded from EEPROM.
Bits 2-1 Type Read_only
These two bits are hardwired to 00, indicating the memory range can locate anywhere in 32 bit
address space.
Bit 0 Memory Space Indicator Read_only
This bit is hardwired to 0, indicating a memory space is allocated.
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