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參數(shù)資料
| 型號： | LAN83C175 |
| 廠商： | STANDARD MICROSYSTEMS CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | Ethernet CARDBUS Integrated Controller With Modem Support |
| 中文描述： | 1 CHANNEL(S), 100M bps, LOCAL AREA NETWORK CONTROLLER, PQFP208 |
| 封裝： | 28 X 28 MM, 1.40 MM HEIGHT, TQFP-208 |
| 文件頁數(shù)： | 64/92頁 |
| 文件大?。?/td> | 299K |
| 代理商： | LAN83C175 |
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64
Modem and External Flash RAM Interface and Control
Access to the external modem is made
through accesses by the host to the EPIC/C.
The CardBus configuration space for the
modem function must be setup during card
initialization. Once this is done, I/O or
memory space writes or reads on the CardBus
to these defined spaces will be passed to the
modem or its register space. Accesses to the
modem I/O address space are defined in
Table 3, with dword addresses shown. Note
that accesses to the physical modem read and
write addresses physically found in the
modem, such as the transmit and receive
FIFO’s. The other registers are physically
located in the EPIC/C.
I/O accesses to dword addresses 00-7C are
passed to the modem itself on a byte addressed
basis. For example, if a read access has the I/O
base address register, with bit CAD(7) equal to ‘0’,
bits CAD(6:0) are passed directly to the modem.
A modem, typically, will only use 3-6 address
lines, but the EPIC/C can accommodate up to 128
byte addresses to the physical modem in the
EPIC/C’s I/O space.
Accesses to dword addresses 80-94 will return the
registers shown in Table and defined later in the
document.
Access to the external RAM is through the 64K
byte configuration space defined in the Expansion
ROM Base Address.
Modem Registers Map
Table 4 - Modem I/O Address Space
00
04
08
0C
10
14
18
1C
20
24
28
2C
40
44
48
4C
50
54
58
5C
60
64
68
6C
80
84
88
8C
90
94
98
9C
A0
A4
A8
AC
NVCTL_m
STATUS_m
FEVTR
FEVTRMSKR
FPRSTSTR
FFRCEVTR
C0
C4
C8
CC
D0
D4
D8
DC
E0
E4
E8
EC
Physical
Modem
Address
Space
(must be
byte addressed)
Physical
Modem
Address
Space
(must be
byte
addressed)
Unused
Unused
30
34
38
3C
70
74
78
7C
B0
B4
B8
BC
F0
F4
F8
FC
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