COBHAM GR712RC User Manual

GR712RC-UM, Jun 2017, Version 2.9 133 www.cobham.com/gaisler
GR712RC
Table 112. GRETH control register
31 28 27 876543210
0000 RESERVED SP RS PM FD RI TI RE TE
27: 8 RESERVED
7 Speed (SP) - Sets the current speed mode. 0 = 10 Mbit, 1 = 100 Mbit. A default value is automati-
cally read from the PHY after reset. Reset value: ‘1’.
6 Reset (RS) - A one written to this bit resets the GRETH core. Self clearing.
5 Promiscuous mode (PM) - If set, the GRETH operates in promiscuous mode which means it will
receive all packets regardless of the destination address. Reset value: ‘0’.
4 Full duplex (FD) - If set, the GRETH operates in full-duplex mode otherwise it operates in half-
duplex. Reset value: ‘0’.
3 Receiver interrupt (RI) - Enable Receiver Interrupts. An interrupt will be generated each time a
packet is received when this bit is set. The interrupt is generated regardless if the packet was
received successfully or if it terminated with an error. Reset value: ‘0’.
2 Transmitter interrupt (TI) - Enable Transmitter Interrupts. An interrupt will be generated each time a
packet is transmitted when this bit is set. The interrupt is generated regardless if the packet was
transmitted successfully or if it terminated with an error. Reset value: ‘0’.
1 Receive enable (RE) - Should be written with a one each time new descriptors are enabled. As long
as this bit is one the GRETH will read new descriptors and as soon as it encounters a disabled
descriptor it will stop until TE is set again. This bit should be written with a one after the new
descriptors have been enabled. Reset value: ‘0’.
0 Transmit enable (TE) - Should be written with a one each time new descriptors are enabled. As long
as this bit is one the GRETH will read new descriptors and as soon as it encounters a disabled
descriptor it will stop until TE is set again. This bit should be written with a one after the new
descriptors have been enabled. Reset value: ‘0’.
Table 113. GRETH status register
31 876543210
RESERVED IA TS TA RA TI RI TE RE
7 Invalid address (IA) - A packet with an address not accepted by the MAC was received. Cleared
when written with a one. Reset value: ‘0’.
6 Too small (TS) - A packet smaller than the minimum size was received. Cleared when written with a
one. Reset value: ‘0’.
5 Transmitter AHB error (TA) - An AHB error was encountered in transmitter DMA engine. Cleared
when written with a one. Not Reset.
4 Receiver AHB error (RA) - An AHB error was encountered in receiver DMA engine. Cleared when
written with a one. Not Reset.
3 Transmitter interrupt (TI) - A packet was transmitted without errors. Cleared when written with a
one. Not Reset.
2 Receiver interrupt (RI) - A packet was received without errors. Cleared when written with a one. Not
Reset.
1 Transmitter error (TE) - A packet was transmitted which terminated with an error. Cleared when
written with a one. Not Reset.
0 Receiver error (RE) - A packet has been received which terminated with an error. Cleared when writ-
ten with a one. Not Reset.

COBHAM GR712RC Specifications

General

Brand	COBHAM
Model	GR712RC
Category	Computer Hardware
Language	English