cx82100 Conexant Systems, Inc., cx82100 Datasheet - Page 129

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cx82100

Manufacturer Part Number
cx82100
Description
Home Network Processor Hnp
Manufacturer
Conexant Systems, Inc.
Datasheet

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101306C
Bit(s)
10:9
15
14
13
12
11
8
7
6
5
4
Type
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
Default
2’b00
1’b0
1’b0
1’b0
1’b0
1’b0
1’b0
1’b0
1’b0
1’b0
1’b0
Conexant Proprietary and Confidential Information
E_NA_JBD
E_NA_HUJ
E_NA_JCLK
E_NA_SB
E_NA_FD
E_NA_OM
E_NA_FC
E_NA_HLAN
E_NA_SR
E_NA_NS
E_NA_RWR
CX82100 Home Network Processor Data Sheet
Name
Jabber Disable.
E_NA_JCLK controls the duration of the Transmit Jabber Time-Out
clock.
Host Un-Jabber Control.
This field configures the time delay between a Transmit Jabber time-
out event and re-enabling the transmit process.
The bit-time is dependent on the current network operating speed.
Jabber Clock Control.
This field is used to configure the length of the timer used to detect
transmit jabber conditions and cut-off transmission.
Start/Stop Backoff Counter.
Valid only in Half-Duplex mode. If this field is cleared, the collision
backoff counter may expire while Carrier Sense is true. Since Carrier
Sense is an indication of network activity, the HNP may attempt to
transmit and have to defer.
Full-Duplex Select.
Operating Mode Select.
Configures the device for normal operation or Loopback test modes.
TX Force Collisions.
7-WS Enable.
Receive Start/Stop Control.
Network Speed Select.
Receive Watchdog Release Time Select.
0 = Enable.
1 = Disable checking for exceedingly long packets during transmit
0 = 420 ms/42 ms.
1 = Immediate.
0 = 26 ms/2.6 ms.
1 = 2560 bit-times.
0 = Incrementing of the collision backoff counter is not stopped
1 = Incrementing of the collision backoff counter is stopped while
0 = Configure for half-duplex operation.
1 = Configure for full-duplex operation.
00 = Normal operation.
10 = External Loopback test.
01 = Internal Loopback test.
11 = Reserved.
0 = Do not force collisions on each transmit attempt while in Internal
1 = Force collisions on each transmit attempt while in Internal
0 = Enable Parallel Data Mode on MII pins.
1 = Enable 7-wire serial interface (7-WS) on MII pins.
1 = Start receive.
0 = Stop receive.
0 = Configure 100 Mbps network speed.
1 = Configure 10 Mbps network speed.
0 = Release watchdog timer 24 bit times after carrier is deasserted.
1 = Release watchdog timer 48 bit times after carrier is deasserted.
operations. If the Transmit Jabber function is enabled, E_S_TJT
will be set after the timer has expired.
while Carrier Sense is true.
Carrier Sense is true. Once Carrier Sense is false, the counter
will resume incrementing.
Loopback mode.
Loopback mode.
Description
7-31

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