TLK100_11 Datasheet, PDF (60/88 Pages) Texas Instruments – Industrial Temp, Single Port 10/100 Mb/s Ethernet Physical Layer Transceiver

TLK100
SLLS931B – AUGUST 2009 – REVISED DECEMBER 2009
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8.4.15 False Carrier Sense Counter Register (FCSCR)
This register counts the error nibbles between the IDLE nibbles (BAD_SSD), in nibble time. This count
register is reset when this register is read.
Table 8-28. False Carrier Sense Counter Register (FCSCR), address 0x0042
BIT
BIT NAME
15:8 RESERVED
7:0 idle_err_count_100
DEFAULT
0, RO
0, RO
DESCRIPTION
Ignore on read
IDLE error counter value. Counts received error nibbles between IDLE nibbles (BAD_SSD), in
nibble time.
Note: Reading this register clears the idle_err_count_100 counter
8.4.16 RX Channel Control Register (RXCCR)
This register allows configuration of RX channel. By programming bits 3,2 of this register to ‘1’ the
channels can be mirrored.
BIT
NAME
15:4 Reserved
3 Polarity_inv
2 Mdix
1:0 Reserved
Table 8-29. RX Channel Control Register (RXCCR), address 0x0070
DEFAULT
0,RO
0,RW
0,RW
0,RW
FUNCTION
Ignore on read
When 1 Change the polarity of:
1 = Polarity of RD and TD is inverted
0 = Polarity of RD and TD is not inverted
1 = MDIX
0 = MDI
Always write 0
8.5 Cable Diagnostic Registers
8.5.1 Cable Diagnostic Registers (CDCR)
This register is used to select the channel for which cable diagnostics test needs to be done. It has the
enable bits for the diagnostic tests and also allows one to choose which TDR peak and location will be
written to the CDRR register (0x001C).
Table 8-30. Cable Diagnostic Registers (CDCR), address 0x001A
BIT
15:14
13
12
NAME
Reserved
ALCD/DSA Test
Start
TDR Test Start
11 Reserved
10:8 Cable Diagnostics
Result Select
8:1 Reserved
0 Channel Select
DEFAULT
0,RW, SC
0,RW, SC
0,RW, SC
0,RO
0,RW
0,RO
0,RW
DESCRIPTION
Always 0
1 = Start ALCD/DSA test.
0 = Do not start ALCD/DSA test
1 = Start TDR test
0 = Do not start TDR test
Reserved
Selects the output of register 0x1C as follows:
0: {TDR peak 0 amplitude, TDR peak 0 location}
1: {TDR peak 1 amplitude, TDR peak 1 location}
2: {TDR peak 2 amplitude, TDR peak 2 location}
3: {TDR peak 3 amplitude, TDR peak 3 location}
4: {TDR peak 4 amplitude, TDR peak 4 location}
6: ALCD Length
Ignore on read
Selects channel for Cable Diagnostics Test
0 = TD±
1 = RD±
60
Register Block
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