Table 6-70. Sqerr Register; Table 6-71. Sqerr Fields; Table 6-72. Rxlen Register; Table 6-73. Rxlen Fields - Sharp LH79524 User Manual

LH79524/LH79525 User's Guide

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.
BIT
FIELD
RESET
TYPE
BIT
FIELD
RESET
TYPE
ADDR
BITS
31:8
7:0
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.
BIT
FIELD
RESET
TYPE
BIT
FIELD
RESET
TYPE
ADDR
BITS NAME
31:8
7:0

Table 6-70. SQERR Register

31 30 29 28
0 0 0 0
RO RO RO RO RO
15 14 13 12
///
0 0 0 0
RO RO RO RO RO
NAME
/// Reserved Reading returns 0. Write the reset value.
SQE Test Errors Shows the number of frames where the ETHERCOL pin was
SQERR
not asserted within 96 bit times
31 30 29 28
0 0 0 0
RO RO RO RO RO
15 14 13 12
///
0 0 0 0
RO RO RO RO RO
/// Reserved Reading returns 0. Write the reset value.
Receive Length Field Mismatch Contains the number of received frames that
RXLEN
have a measured length shorter than that extracted from its length field.
27 26 25 24 23
///
0 0 0 0 0
RO RO RO RO
11 10 9 8 7
0 0 0 0 0
RO RO RO RW
0xFFFC7000 + 0x84

Table 6-71. SQERR Fields

FUNCTION

Table 6-72. RXLEN Register

27 26 25 24 23
///
0 0 0 0 0
RO RO RO RO
11 10 9 8 7
0 0 0 0 0
RO RO RO RW
0xFFFC7000 + 0x88

Table 6-73. RXLEN Fields

FUNCTION
Version 1.0
Ethernet MAC Controller
22 21 20 19 18
0 0 0 0 0
RO RO RO RO RO
6 5 4 3 2
SQERR
0 0 0 0 0
RW RW RW RW RW
22 21 20 19 18
0 0 0 0 0
RO RO RO RO RO
6 5 4 3 2
RXLEN
0 0 0 0 0
RW RW RW RW RW
17 16
0 0
RO RO
1 0
0 0
RW RW
17 16
0 0
RO RO
1 0
0 0
RW RW
6-47