Cirrus Logic ARM CDB89712, Руководство пользователя

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7-1
Copyright

Cirrus Logic, Inc. 2000
(All Rights Reserved)
P.O. Box 17847, Austin, Texas 78760
(512) 445 7222 FAX: (512) 445 7581
http://www.cirrus.com
CDB89712
Chapter 7: Board Specifications
7.1 INTRODUCTION
This chapter describes the specifications for the development board and the components on the
board. It also describes the optimum operating and storage environment that ensures that the
development board will operate at the performance levels described in the
CS89712 Data Sheet .
7.2 PHYSICAL SPECIFICATION
The development board has the physical characteristics described in the following sections.
7.2.1 Printed Circuit Board (PCB)
7.2.1.1. PCB Form Factor
The PCB form factor is 19.6 cm x 20.2 cm (7.7” x 8”). A picture of the board is shown in Figure 4-
3, “Layout of CS89712 Development Board with Major Board Components Identified,” .
7.2.1.2. PCB Construction Materials
The PCB is constructed from materials with a flame rating of 94V0. This rating meets the
self-extinguishing characteristics required by safety agencies in countries of sale.
7.2.1.3. Connector Characteristics
Processor Daughter Module Headers (J4-J7)
The four connectors intended for use as daughter module headers are arranged around the processor
and are intended for future processor development. Example part: Samtec - TSW-125-07-G-D.
Expansion Header (J22)
These headers bring out the pins for the keyboard, LCD, and other interfaces. The headers are 0.100”
spacing, 0.025” square posts. Example part: Samtec TSW-120-07-G-S.
Ethernet (J3)
The Ethernet connector used in this design is a standard right angle 10Base-T RJ45. Example part:
CorCom - RJ45-8L2-S.
Serial Ports (J8, J9)
The serial port connectors are male, right angle standard density 9-contact DSUBs. Example part:
JUL ‘01
DS502UM2