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CDB8952
Crystal LAN? 10Base-T and 100Base-X Transceiver
INTRODUCTION
This manual provides information specifically on
the CDB8952 Evaluation board and generally on
any design incorporating the CS8952 Crystal-
LAN TM 10Base-T and 100Base-X Transceiver.
The reader should have a general knowledge of
hardware design and Ethernet operation.
J5 - MII Power. When the board is connected to a
system that does not supply power through the MII
connector, +5 V or +3.3 V must be supplied here.
J6 - CS8952 Core Power. +5 V must be supplied
here from either J5 (if +5 V is supplied through the
MII connector) or an external power supply.
J13 - MII Connector (Table 3).
Background Information
Pin
1
Function
MII Power
Pin
21
Function
MII Power
?
?
IEEE Std 802.3u-1995 (ISO/IEC 8802.3:1996)
CSMA/CD Access Method and Physical Layer
Specifications
IEEE Std 802.3u-1995 Supplement Clause 28
(Auto- N egotiation)
2
3
4
5
6
7
8
MDIO
MDC
RXD3
RXD2
RXD1
RXD0
RX_DV
22
23
24
25
26
27
28
Ground
Ground
Ground
Ground
Ground
Ground
Ground
?
CS8952 CrystalLAN TM
10Base-T
and
9
RX_CLK
29
Ground
100Base-X Transceiver Datasheet
Evaluation Kit Contents
The CDB8952 Evaluation Board Kit includes the
following:
10
11
12
13
14
15
RX_ER/RXD4
TX_ER/TXD4
TX_CLK
TX_EN
TXD0
TXD1
30
31
32
33
34
35
Ground
Ground
Ground
Ground
Ground
Ground
Quantity Item
1 CDB8952 Evaluation Board
1 CS8952 Datasheet
1 CDB8952 Reference Manual
1 CDB8952 Kit Packing List
Table 1. Evaluation Kit Contents
16
17
18
19
20
TXD2 36
TXD3 37
COL 38
CRS 39
MII Power 40
Table 3. MII Connector
Ground
Ground
Ground
Ground
MII Power
BOARD CONFIGURATION
I/O Connectors
J1 - External TX_CLK. This connector may be
used to supply TX_CLK when HDR42 and HDR43
are set appropriately.
J2 - RJ45, Twisted-pair Media (Table 2).
Pin Function
1 TD+
2 TD-
Configuration Jumpers and Switches
S1 - Board Reset. Depressing this push-button
switch will force the CS8952 into a reset state.
S2 - Test 1 (not populated). This switch is used to
select a factory test mode, and should not be
pressed during normal operation.
S3 - Physical Address Select. This 5-position
switch is used to select the physical address to
which the CS8952 will respond. “Open” or “Off”
3
4
5
6
7
8
RD+
-
-
RD-
-
-
will set the corresponding physical address bit to
ZERO, while “Closed” or “On” will set it to ONE.
The CS8952 checks the positions of this switch
only during power-up or reset. If any switch posi-
tion is changed, a reset or power cycle is required
Table 2. Twisted-pair Media
before the new settings will take effect.
CIRRUS LOGIC ADVANCED PRODUCT DATABOOK
2
DS206DB2
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