CRD8900A-1 Cirrus Logic Inc, CRD8900A-1 Datasheet - Page 15

• 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

DS271F5
EECS - EEPROM Chip Select, PIN 3.
EEDataIn - EEPROM Data In, Input Internal Weak Pullup PIN 6.
ELCS - External Logic Chip Select, Internal Weak Pullup PIN 2.
EEDataOut - EEPROM Data Out, PIN 5.
CSOUT - Chip Select for External Boot PROM, PIN 17.
10BASE-T Interface
TXD+/TXD- - 10BASE-T Transmit, Differential Output Pair PINS 87 and 88.
RXD+/RXD- - 10BASE-T Receive, Differential Input Pair PINS 91 and 92.
Attachment Unit Interface (AUI)
DO+/DO- - AUI Data Out, Differential Output Pair PINS 83 and 84.
DI+/DI- - AUI Data In, Differential Input Pair PINS 79 and 80.
CI+/CI- - AUI Collision In, Differential Input Pair PINS 81 and 82.
CS8900A
Crystal LAN™ Ethernet Controller
Active-high output used to select the EEPROM.
Serial input used to receive data from the EEPROM. Connects to the DO pin on the
EEPROM. EEDataIn is also used to sense the presence of the EEPROM.
Bi-directional signal used to configure external Latchable Address (LA) decode logic. If
external LA decode logic is not needed, ELCS should be tied low.
Serial output used to send data to the EEPROM. Connects to the DI pin on the
EEPROM. When TEST is low, this pin becomes the output for the Boundary Scan
Test.
Active-low output used to select an external Boot PROM when the CS8900A decodes
a valid Boot PROM memory address.
Differential output pair drives 10 Mb/s Manchester-encoded data to the 10BASE-T
transmit pair.
Differential input pair receives 10 Mb/s Manchester-encoded data from the 10BASE-T
receive pair.
Differential output pair drives 10 Mb/s Manchester-encoded data to the AUI transmit
pair.
Differential input pair receives 10 Mb/s Manchester-encoded data from the AUI receive
pair.
Differential input pair connects to the AUI collision pair. A collision is indicated by the
presence of a 10 MHz ± 15% signal with duty cycle no worse than 60/40.
CIRRUS LOGIC PRODUCT DATASHEET
15