參數(shù)資料
型號(hào): 83C795
廠商: SMSC Corporation
英文描述: Ethernet System Controller
中文描述: 以太網(wǎng)系統(tǒng)控制器
文件頁(yè)數(shù): 73/136頁(yè)
文件大小: 1996K
代理商: 83C795
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register map shown in Table 6-7 changes when the
adapter is run in I/O-mapped mode (see section
6.8.6). Also, when the ROM space is disabled
(when BIO.4 and BIO.5 are both set), the ROM
configuration registers become read-only and
always read zeros.
There are 22-bits of information in the PnP
configuration registers that are used for configuring
the 83C795. These bits are shifted from the PnP
section to the 83C795 section whenever the chip is
activated. The same bits are shifted from the
83C795 section back to the PnP section at the end
of the initial EEROM load (to get the default values
into the PnP registers). Some of these bits may
have to be remapped before they are shifted so as
to match the formats of the two different register
Address
Function
Name
READ_DATA PORT ADDRESS
Resource String
Number
Secondary
Address
00
01
0 - 7
02
8
03
9 - N
04
N + 1
05
06
07
N + 2
30
31
40
41
42
43
44
48
49
4A
4B
4C
60
61
70
71
SERIAL ISOLATION
CONFIGURATION CONTROL
WAKE (CSN)
RESOURCE DATA
STATUS
CARD SELECT NUMBER
(CSN)
LOGICAL DEVICE NUMBER
ACTIVATE
I/O RANGE CHECK
RAM BASE ADDRESS [23-16]
RAM BASE ADDRESS [15-08]
ROM BASE ADDRESS [23-16]
RAM RANGE LENGTH [15-08]
ROM BASE ADDRESS [15-08]
RAM CONTROL
RAM RANGE LENGTH [23-16]
ROM CONTROL
ROM RANGE LENGTH [23-16]
ROM RANGE LENGTH [15-08]
I/O BASE ADDRESS [15-08]
I/O BASE ADDRESS [07-00]
IRQ NUMBER
IRQ TYPE
Serial ID
Checksum
Resource Data
End Tag
Checksum
Item
ADDRESS
WRITE_DATA
READ_DATA
0x0279
0x0A79
0x0200 -
0x03FF
ISA ADDRESS SPACE
EEROM CONTENTS
PNP SECONDARY ADDRESS SPACE
FIGURE 6-8. PLUG AND PLAY CONFIGURATION REGISTERS
83C795
HOST INTERFACE SECTION
60
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