dp83261 National Semiconductor Corporation, dp83261 Datasheet - Page 65

• Manufacturer Part Number: dp83261
• Description: Bmac Device Fddi Media Access Controller
• Manufacturer: National Semiconductor Corporation

6 0 Control Information
Frame Copied Counter (FCCT)
The Frame Copied Counter (FCCT) maintains the count of the number of frames successfully copied by this station This
counter can be used to accumulate station performance statistics
The Frame Copied Counter is incremented when an internal or external match occurs on the Destination Address no errors
were detected in the frame and the frame was successfully copied (VCOPY signal is asserted) Copied MAC and Void frames
are not included in this count
For SMT NSA frames the Frame Copied Count only increments for NSA frames received with the A Indicator as an R symbol for
which the frame was copied SMT NSA frames received with the A Indicator as an S do not cause this count to increment even
if the frame is successfully copied
Increments are available on increment (CILR FRCOP) and when the 20-bit counter overflows and wraps around (COLR FRC-
OP)
ACCESS RULES
FCCT0
FCCT1
FCCT2
FCCT3
Address
AC – AFh
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
65
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