dp83261 National Semiconductor Corporation, dp83261 Datasheet - Page 62
dp83261
Manufacturer Part Number
dp83261
Description
Bmac Device Fddi Media Access Controller
Manufacturer
National Semiconductor Corporation
Datasheet
1.DP83261.pdf
(132 pages)
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6 0 Control Information
Frame Received Counter (FRCT)
The Frame Received Counter (FRCT) is specified in the FDDI MAC Standard It is the count of all complete frames received
including MAC frames Void frames and frames stripped by this station
Interrupts are available on increment (CILR FRRCV) and when the 20-bit counter overflows and wraps around (COLR FRRCV)
ACCESS RULES
FRCT0
FRCT1
FRCT2
FRCT3
Address
A0 – A3h
CT(15)
CT(7)
Zero
Zero
D7
Always
Read
CT(14)
CT(6)
Zero
Zero
D6
(Continued)
Stop Mode
Write
CT(13)
CT(5)
Zero
Zero
D5
CT(12)
CT(4)
Zero
Zero
D4
62
CT(19)
CT(11)
CT(3)
Zero
D3
CT(18)
CT(10)
CT(2)
Zero
D2
CT(17)
CT(9)
CT(1)
Zero
D1
CT(16)
CT(8)
CT(0)
Zero
D0
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