Chapter 1 Introduction; Outline - NEC V850E/RS1 User Manual

The V850E/RS1 is a product in the V850 Series of NEC Electronics Corporation single-chip microcon-
trollers. This chapter provides an overview of the V850E/RS1.

1.1 Outline

The V850E/RS1single chip microcontroller is a member of NEC's V850 32-bit RISC family, which match
the performance gains attainable with RISC-based controllers to the needs of embedded control appli-
cations. The V850E CPU offers easy pipeline handling and programming, resulting in compact code
size comparable to 16-bit CISC CPUs.
The V850E/RS1 offers an excellent combination of general purpose peripheral functions, like serial
communication interfaces (UART, clocked SI, clocked SI with translation buffer), timers and measure-
ment inputs (A/D converter), with dedicated CAN network support. The device offers power-saving
modes to manage the power consumption effectively under varying conditions. Thus equipped, the
V850E/RS1 is ideally suited for automotive applications.
(1) Implementation of V850E CPU
The V850E CPU supports a RISC instruction set in which instruction execution speeds are
increased greatly through the use of basic instructions that execute one instruction per clock and
optimized pipelines.
Object code efficiency is increased in the C compiler by using 2-byte length basic instructions and
instructions corresponding to high-level languages, which makes a program compact.
Furthermore, since interrupt response time including processing by the on-chip interrupt controller
also is fast, this CPU is suited to the realm of advanced real-time control.
(2) Peripheral I/O function
The V850E/RS1 includes various function Timer (TMQ, TMP, TMM) and, Serial interface (CSI3,
CSIB, UART) and CAN controller. CSI3 includes translation buffer (20 bits x 16 depth).
(3) External bus interface function (µPD70F3403 and µPD70F3403A)
The µPD70F3403 and µPD70F3403A are provided with an external bus interface function by
which external memories such as ROM and RAM, and I/O can be connected.
Cautions: 1. Do not set up any external bus interface configuration to the µPD70F3402.
(4) On-chip flash memory
The µPD70F3402, µPD70F3403 and µPD70F3403A have on-chip an high speed flash memory,
which is able to fetch one instruction within one clock cycle. It is possible to program the user
application directly on the target board, on which the V850E/RS1 is mounted. In such case, sys-
tem development time can be reduced and system maintainability after shipping can be markedly
improved.
(5) A full range of development environment products
A development environment system that includes an optimized C compiler, debugger, in-circuit
emulator, simulator, system performance analyzer, and other elements is also available.
Downloaded from Elcodis.com electronic components distributor

Chapter 1 Introduction

2. External bus interface functions are only described for the µPD70F3403 and
µPD70F3403A microcontrollers.
User's Manual U16702EE3V2UD00 29