LAN8820 Datasheet, PDF (49/83 Pages) Microchip Technology – RGMII 10/100/1000 Ethernet Transceiver

LAN8820/LAN8820I
4.2.19 CONTROL / STATUS INDICATIONS REGISTER
Index (In Decimal): 27
Size:
16 bits
Bits
Description
15:10
9
RESERVED
RGMII PHY TXC Delay Enable
Configures the RGMII PHY TXC delay mode:
0 = RGMII PHY TXC delay mode disabled
1 = RGMII PHY TXC delay mode enabled
8
RGMII PHY RXC Delay Enable
Configures the RGMII PHY RXC delay mode:
0 = RGMII PHY RXC delay mode disabled
1 = RGMII PHY RXC delay mode enabled
7:5 RESERVED
4
XPOL
Polarity state of the 10BASE-T:
0 = Normal polarity
1 = Reversed polarity
3:0 RESERVED
Type
RO
R/W
NASR
Default
-
Note 4-8
R/W
NASR
Note 4-8
RO
-
RO
0b
RO
-
Note 4-8
The default is determined by the RGMII_ID_MODE configuration strap. When RGMII_ID_MODE is
latched high, bits 8 and 9 are “1”. When RGMII_ID_MODE is latched low, bits 8 and 9 are “0”. Refer
to Section 3.3, "RGMII Interface," on page 18 and Section 3.8.1.1, "Configuration Straps," on page 24
for additional information.
4.2.20 INTERRUPT SOURCE FLAGS REGISTER
Index (In Decimal): 29
Size:
16 bits
Bits
15:11
10
9
8
Description
RESERVED
INT10
0 = Not source of interrupt
1 = Transmitter Elastic Buffer Overflow
INT9
0 = Not source of interrupt
1 = Transmitter Elastic Buffer Underflow
INT8
0 = Not source of interrupt
1 = Idle Error Count Overflow
Type
RO
LH/WC
Default
-
0b
LH/WC
0b
LH/WC
0b
 2009-2015 Microchip Technology Inc.
DS00001871B-page 49