NEC Network Controller uPD98502 - Manual (Page 6)

6 Preliminary User’s Manual S15543EJ1V0UM
PREFACE
Readers This manual is intended for engineers who need to be familiar with the capability of
the µPD98502 in order to develop application systems based on it.
Purpose The purpose of this manual is to help users understand the hardware capabilities
(listed below) of the
µPD98502.
Configuration This manual consists of the following chapters:
• Introduction
• V
R 4120A  CPU
• System controller
• ATM cell processor
• Ethernet controller
• USB controller
• PCI controller
• UART
• Timer
• Micro Wire
Guidance Readers of this manual should already have a general knowledge of electronics, logic
circuits, and microcomputers.
To gain an overall understanding of the function of the
µPD98502:
→ Read through all the chapters, in sequence.
To check the electrical characteristics of the µPD98502:
→ Refer to the separate data sheet.
Notation This manual uses the following conventions:
Data bit significance: High-order bits on the left side;
low-order bits on the right side
Active low: XXXX_B (Pin and signal names are suffixed with _B.)
Note: Explanation of an indicated part of text
Caution: Information requiring the user’s special attention
Remark: Supplementary information
Numerical value: Binary ... xxxx or xxxxB
Decimal ... xxxx
Hexadecimal ... xxxxH
Related Document Use this manual in combination with the following document.
The related documents indicated in this publication may include preliminary versions.
However, preliminary versions are not marked as such.
• µPD98502 Data Sheet: S15409E