dp83251 National Semiconductor Corporation, dp83251 Datasheet - Page 49
dp83251
Manufacturer Part Number
dp83251
Description
Player Device Fddi Physical Layer Controller
Manufacturer
National Semiconductor Corporation
Datasheet
1.DP83251.pdf
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5 0 Registers
DEVICE ID REGISTER (IDR)
The Device ID Register contains the binary equivalent of the revision number for this device It can be used to ensure proper
software and hardware versions are matched
During the Control Bus Interface write-cycle the PLAYER device will set the Control Bus Write Command Register bit (CCR) of
the Interrupt Condition Register (ICR) to 1 and will ignore write-cycle
ACCESS RULES
D0
D1 – 6
D7
D7
DID7
ADDRESS
Bit
18h
D6
DID6
(Continued)
DID0
DID1 – 6
DID7
READ
Always
Symbol
D5
DID5
WRITE
Write Reject
D4
DID4
DEVICE ID BIT
DEVICE ID BIT
DEVICE ID BIT
D3
DID3
49
k
k
k
0
1-0-6
7
l
l
Least significant bit (LSB) of the revision number
Most significant bit (MSB) of the revision number
D2
DID2
l
Intermediate bits of the revision number
Description
D1
DID1
D0
DID0
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