Table 6-8. Netconfig Register; Table 6-9. Netconfig Fields; Network Configuration Register (Netconfig) - Sharp LH79524 User Manual

Ethernet MAC Controller

6.3.2.2 Network Configuration Register (NETCONFIG)

This register allows general network configuration.
BIT
FIELD
RESET
TYPE
BIT
FIELD
RESET
TYPE
ADDR
BITS
31:20
19
18
17
16
15:14
13
6-22

Table 6-8. NETCONFIG Register

31 30 29 28
0 0 0 0
RO RO RO RO RO
15 14 13 12
0 0 0 0
RW RW RW RW RW

Table 6-9. NETCONFIG Fields

NAME
/// Reserved Reading returns 0. Write the reset value.
Ignore RX FCS This bit causes frames with FCS/CRC errors to not be rejected
and no FCS error statistics to be counted. For normal operation, this bit must be
programmed to 0.
IGNORE
1 = Do not reject frames with FCS/CRC errors or count FCS errors
0 = Normal operation
Enable Frames Enable frames to be received in half-duplex mode while transmitting.
ENFRM
1 = Enable frame receipt in half-duplex mode while transmitting
0 = Disable frame receipt in half-duplex mode while transmitting
Discard Receive FCS Specifies whether the FCS field of received frames will be
copied to memory.
DISCARDFCS
1 = Do not copy FCS field to memory
0 = Copy FCS field to memory
Receive Length Field Checking Enable Specifies whether frames with measured
lengths shorter than their length fields will be discarded. Frames containing a type ID
in bytes 13 and 14 (length/type ID = 0600) will not be counted as length errors.
LENGTHCHK
1 = Discard frames with length shorter than length field
0 = Do not discard frames with length shorter than length field
Receive Buffer Offset Indicates the number of bytes by which the received data
RXBUFOS
is offset from the start of the first receive buffer.
Pause Enable Specifies if transmission will pause when a valid Pause frame is
received.
PAUSEEN
1 = Pause transmission if a valid Pause frame is received
0 = Do not pause on receipt of a Pause frame
27 26 25 24 23
///
0 0 0 0 0
RO RO RO RO
11 10 9 8 7
DIV ///
1 0 0 0 0
RW RW RW RW
0xFFFC7000 + 0x04
FUNCTION
Version 1.0
LH79524/LH79525 User's Guide
22 21 20 19 18
0 0 0 0 0
RO RO RO RW RW
6 5 4 3 2
0 0 0 0 0
RW RW RW RW RW
17 16
0 0
RW RW
1 0
///
0 0
RW RW