dp83261 National Semiconductor Corporation, dp83261 Datasheet - Page 45

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

Bit
D0
D1
D2
D3
D4
D5
D6
D7
6 0 Control Information
Counter Overflow Mask Register (COMR)
The Counter Overflow Mask Register (COMR) is used to mask bits from the Counter Overflow Latch Register (COLR) If a bit in
Register COMR is set to One the corresponding bit in Register COLR will be applied to the Interrupt Condition Register which
can then be used to generate an interrupt
All bits in this register are set to Zero upon reset
ACCESS RULES
REGISTER BITS
RES
D7
Address
FRRCV
FREI
FRLST
FRCOP
FRNCOP
FRTRX
TKRCVD
RES
Symbol
1Dh
TKRCVD
D6
Frame Received Counter Overflow Mask This bit is used to mask COLR FRRCV
Error Isolated Counter Overflow Mask This bit is used to mask COLR FREI
Lost Frame Counter Overflow Mask This bit is used to mask COLR FRLST
Frame Copied Counter Overflow Mask This bit is used to mask COLR FRCOP
Frame Not Copied Counter Overflow Mask This bit is used to mask COLR FRNCOP
Frame Transmitted Counter Overflow Mask This bit is used to mask COLR FRTRX
Token Received Counter Overflow Mask This bit is used to mask COLR TKRCVD
Reserved
FRTRX
D5
Always
Read
FRNCOP
D4
(Continued)
FRCOP
Always
Write
D3
FRLST
D2
45
FREI
D1
Description
FRRCV
D0