Cirrus Logic EP93 Series User Manual page 350

1/10/100 Mbps Ethernet LAN Controller
EP93xx User's Guide
9
DiagAd
31 30
15 14
Address:
Chip Reset:
Soft Reset:
Definition:
Bit Descriptions:
9-48
RESET:
29 28 27 26
13 12 11 10
RSVD
0x8001_0038 - Read/Write
0x0000_0000
0x0000_0000
Diagnostic Address Register. The Diagnostic Address Register provides an
indirect addressing method to point to internal diagnostic locations, which
provide access to features not required for normal driver operation. To access
the internal registers, the address of the register is written to the Diagnostic
Address register, and the Diagnostic Data register is used to access the actual
data.
RSVD:
ADDR:
Copyright 2007 Cirrus Logic
Soft Reset. This is an act-once bit. When set, a Soft Reset
is initiated immediately, this will reset the FIFO, mac and
Descriptor Processor. This bit is cleared as a result of the
reset. Driver software should wait until the bit is cleared
before proceeding with MAC initialization.
25 24 23 22
RSVD
9 8 7 6
Reserved. Unknown During Read.
Diagnostic Address. The following table identifies the
address map.
Address Register Name
0x00 Debug Control
0x04 Debug FIFO Control
0x08 Debug FIFO Data
0x98 Receive Data FIFO Pointers
0x9C Transmit Data FIFO Pointers
0xA0 Receive Status FIFO Pointers
0xA4 Transmit Status FIFO Pointers
0xA8 Receive Descriptor FIFO Pointers
0xAC Transmit Descriptor FIFO Pointers
21 20 19 18
5 4 3 2
ADDR
17 16
1 0
DS785UM1