Sharp LH79524 - Statistics Register Definitions; Table 6-34. PAUSEFRRX Register; Table 6-35. PAUSEFRRX Fields

LH79524/LH79525 User’s Guide Ethernet MAC Controller
Version 1.0 6-37
6.3.3 Statistics Register Definitions
Statistics registers accumulate statistics for software drivers, RMON applications, and
other uses. Reading statistics registers resets the counts to zero. If they are not read
before reaching maximum count, the count does not wrap, but sticks at all 1s. The receive
statistics registers only increment when the NETCTL:RXEN is programmed to 1.
For testing purposes, the statistics registers can be written to. Before writing to the statis-
tics registers, NETCTL:WRENSTAT must first be programmed to 1.
6.3.3.1 Pause Frames Received (PAUSEFRRX)
This register allows software to read the number of good pause frames received. A good
frame has a length of 64 to 1,518 (1,522 if NETCONFIG:RECBYTE is 1) and has no FCS,
alignment or receive symbol errors.
Table 6-34. PAUSEFRRX 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 PAUSEFRRXOk
RESET 0000000000000000
TYPE RW RW RW RW RW RW RW RW RW RW RW RW RW RW RW RW
ADDR 0xFFFC7000 + 0x3C
Table 6-35. PAUSEFRRX Fields
BITS NAME FUNCTION
31:16 /// Reserved Reading returns 0. Write the reset value.
15:0 PAUSEFRRXOK
Pause Frames Received OK A 16-bit register counting the num-
ber of good pause frames received.