LH79524/LH79525 User’s Guide Ethernet MAC Controller
Version 1.0 6-41
6.3.3.8 Deferred Transmission Frames (DEFTXFRM)
This is a 16-bit register containing the number of frames experiencing deferral due to
carrier sense being active on their first attempt at transmission. Frames involved in any col-
lision are not counted nor are frames that experienced a transmit underrun.
6.3.3.9 Late Collisions (LATECOL)
This is an 8-bit register containing the number of frames that experience a collision after
the slot time (512 bit times) has expired. A late collision is counted twice (both as a collision
and a late collision)
.
Table 6-48. DEFTXFRM Register
BIT 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
FIELD ///
RESET 0000000000000000
TYPE RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO
BIT 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
FIELD DEFTXFRM
RESET 0000000000000000
TYPE RW RW RW RW RW RW RW RW RW RW RW RW RW RW RW RW
ADDR 0xFFFC7000 + 0x58
Table 6-49. DEFTXFRM Fields
BITS NAME FUNCTION
31:16 /// Reserved Reading returns 0. Write the reset value.
15:0 DEFTXFRM Deferred Transmission Frames Deferred transmission frames count.
Table 6-50. LATECOL Register
BIT 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
FIELD ///
RESET 0000000000000000
TYPE RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO RO
BIT 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
FIELD /// LATECOL
RESET 0000000000000000
TYPE RO RO RO RO RO RO RO RO RW RW RW RW RW RW RW RW
ADDR 0xFFFC7000 + 0x5C
Table 6-51. LATECOL Fields
BITS NAME FUNCTION
31:8 /// Reserved Reading returns 0. Write the reset value.
7:0 LATECOL Late Collisions Number of late collisions.
To Next Page
Loading...