Sharp LH79524 - SQE Test Errors (SQERR); Table 6-70. SQERR Register; Table 6-71. SQERR Fields; Table 6-72. RXLEN Register

LH79524/LH79525 User’s Guide Ethernet MAC Controller
Version 1.0 6-47
6.3.3.19 SQE Test Errors (SQERR)
This 8-bit register contains the number of frames where the ETHERCOL pin was not
asserted within 96 bit times (one inter-frame gap) of the ETHERTXEN pin being deas-
serted in half-duplex mode.
6.3.3.20 Received Length Field Mismatch (RXLEN)
This register counts the number of received frames that have a measured length shorter
than specified in its length field. Checking is enabled via the NETCONFIG:LENGTHCHK
bit. Frames containing a type ID in bytes 13 and 14 (length/type ID ≥ 0x0600) will not be
counted as length field errors, nor will excessive length frames.
Table 6-70. SQERR 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 /// SQERR
RESET 0000000000000000
TYPE RO RO RO RO RO RO RO RO RW RW RW RW RW RW RW RW
ADDR 0xFFFC7000 + 0x84
Table 6-71. SQERR Fields
BITS NAME FUNCTION
31:8 /// Reserved Reading returns 0. Write the reset value.
7:0 SQERR
SQE Test Errors Shows the number of frames where the ETHERCOL pin was
not asserted within 96 bit times
Table 6-72. RXLEN 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 /// RXLEN
RESET 0000000000000000
TYPE RO RO RO RO RO RO RO RO RW RW RW RW RW RW RW RW
ADDR 0xFFFC7000 + 0x88
Table 6-73. RXLEN Fields
BITS NAME FUNCTION
31:8 /// Reserved Reading returns 0. Write the reset value.
7:0 RXLEN
Receive Length Field Mismatch Contains the number of received frames that
have a measured length shorter than that extracted from its length field.