參數(shù)資料
型號: MX98905B
廠商: Electronic Theatre Controls, Inc.
英文描述: The MX98905 is designed for easy implementation of CSMA/CD local area networks,
中文描述: 該MX98905是專為易于實現(xiàn)的多址/光盤局域網,
文件頁數(shù): 38/86頁
文件大?。?/td> 352K
代理商: MX98905B
38
P/N: PM0365
REV. 1.3, NOV 20 ,1995
MX98905B
These four bits (IOBEN, PAGE, NEWCF and LOCKE)
can be loaded/stored from/to EEPROM.
RESV4..1 --- Reserved bits for future use.
Note:
Don't write this register through Base+09H/
Base+19H except it is confirmed that I/O Base does
not conflict with other Add_on card.
SYMBOL
BIT
DESCRIPTION
IOBEN
D0
I/O BASE ENABLE.
Power-on low
0 :
1 :
7 I/O base (compatible with DP83905)
15 I/O bases
PAGE
D1
PAGE SELECT FOR I/O BASE.
Power-on low
only valid when IOBEN and HCFRE of HCMR is high
0 :
1 :
I/O base address are the same as IOAD2..0 of Configuration A
I/O base address are redefined (see I/O Base support for more detail). This bit
will be updated automatically according to the sequence of AUTO configuration
when IOBEN is set.
NEWCF
D2
NEW CONFIGURATION LOADED TO CA, CB AND CC AFTER EESTORE IS
EXECUTED.
Power-on low
0 :
New configuration will not be loaded to CA, CB and CC after EESTORE
algorithm is executed. Compatible with DP83905.
New Configuration will be loaded to CA, CB and CC after EESTORE algorithm
is completed. Enhanced feature.
1 :
LOCKE
D3
LOCK ENABLE.
I/O base will not be changed when AUTO of HCMR is written into.
Power-on low.
0 :
1 :
Enable internal LOCK bit. Write 1 to AUTO will change I/O base
Enable internal LOCK bit. Write 1 to AUTO will not change I/O base. When this
bit is set, AUTO of HCMR has no effect. User CANNOT read the value of
Signature Register. After I/O base is determined (see Multi_lan card conflict
free for more detail), this bit should be programmed through base+09H for I/O
map or Base+19H for shared memory map.
2.2 HIDDEN CONFIGURATION REGISTER (R/W) (HCFR)(Continued)
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