CRD8900A-1 Cirrus Logic Inc, CRD8900A-1 Datasheet - Page 68

• Manufacturer Part Number: CRD8900A-1
• Description: KIT EVAL FOR CS8900A
• Manufacturer: Cirrus Logic Inc
• Series: CrystalLAN™r

Specifications of CRD8900A-1

• Main Purpose: Interface, Ethernet
• Utilized Ic / Part: CS8900A
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Secondary Attributes: -
• Embedded: -
• Primary Attributes: -
• Other names: 598-1163

Disable Backoff
FDX
At reset, if no EEPROM is found by the CS8900A, then the register has the following initial state. If an EEPROM is
found, then the register’s initial value may be set by the EEPROM. See Section 3.3 on page 19.
Reset value is: 0000 0000 0001 1001
4.4.23 Register 1C: AUI Time Domain Reflectometer
(Read-only, Address: PacketPage base + 013Ch)
The TDR counter (Bits 6 through F) is a time domain reflectometer useful in locating cable faults in 10BASE-2 and
10BASE-5 coax networks. It counts at a 10 MHz rate from the beginning of transmission on the AUI to when a col-
lision or Loss-of-Carrier error occurs. The TDR counter is cleared when read.
011100
AUI-Delay
Reset value is: 0000 0000 0001 1100
68
7
F
AUI Delay
of the inter packet gap before starting transmission. When clear, the backoff algorithm is used.
nored. This bit must be set when performing loopback tests on the 10BASE-T port. When clear,
the CS8900A is configured for standard half-duplex 10BASE-T operation.
Register. When reading this register, these bits will be 011100, where the LSB corresponds to
Bit 0.
transmission on the AUI to when a collision or Loss-of-Carrier error occurs.
When set, the backoff algorithm is disabled. The CS8900A transmitter looks only for completion
When set, 10BASE-T full duplex mode is enabled and CRS (Register 14, LineST, Bit E) is ig-
These bits provide an internal address used by the CS8900A to identify this as the Bus Status
The upper ten bits contains the number of 10 MHz clock periods between the beginning of
E
6
D
5
CIRRUS LOGIC PRODUCT DATASHEET
C
4
AUI Delay
B
3
011100
Crystal LAN™ Ethernet Controller
A
2
1
9
CS8900A
DS271F5
0
8