<About This Manual - 1>
A b o u t T h i s M a n u a l
Objective
The primary objective of this LSI manual is to describe the features of this product including an
overview, CPU basic functions, interrupt, port, timer, serial interface, and other peripheral hardware
functions.
Each section consists of brief functional information, block diagrams and the details of control registers
including operation methods and setting examples.
Structure of This Manual
Each section of this manual consists of a title, summary, main text, hint, precautions and warnings, and
references.
The layout and definition of each section are shown below.
This page serves as an example to the explanations above. It may be different on an actual page.
Precautions and
warnings
Please be sure to read
the precautions to prevent
any loss of functionality or
damage to the chip.
Main text
Section title
Sub section title
Header
Chapter number and
Chapter title
footer
Hint
chapter 2
Basic CPU
I I - 4 8
Reset
2.8
Reset
2.8.1
Reset operation
the CPU contents are reset and registers are intialized when the NRST pin (P
27) is pulled to low.
Initiating a Reset
There are two methods to initiate areset.
(1) Drive the NRST pin low for at least four clock cycles.
NTST pin should be holded "low" for more than 4 clock cycles (200 ns a
t a 20 NHz)
Figure:2.8.1 MInimum Reset PUlse Width
(2) Setting the P2OUT7 flag of the P2OUT register to "0" outputs low level at P
27 (NRST) pin. And transfering to reset by program (software reset) can be
executed. If the internal LSI is reset and register is initiated, the P2OUT
7 flag becomes "1" and reset is released.
On this LSI, the starting mode is NORMAL mode that high oscillation i
s the base clock.
When the power voltage low circuit is connected to NTST pin, circuit t
hat gives pulse for enough low level time at sudeen unconnected. And r
set can be generated even if its pulse is low level as the oscillation
clock is under 4 clocks,take notice of noise.
NRST pin
4 clock cycles
(200 ns at a 20 MHz)
Important information
from the text.
Page # and
section title.
Summary of Contents for MN101L Series
Page 1: ...Cover MICROCOMPUTER MN101L MN101LR05D 04D 03D 02D LSI User s Manual Pub No 21705 015E ...
Page 2: ......
Page 8: ......
Page 10: ......
Page 11: ...Contents Contents 0 ...
Page 22: ... Contents 11 ...
Page 23: ...I Chapter 1 Overview 1 ...
Page 62: ...Chapter 1 Overview I 40 Cautions for Circuit Setup ...
Page 63: ...II Chapter 2 CPU 2 ...
Page 94: ...Chapter 2 CPU II 32 Reset ...
Page 95: ...III Chapter 3 Interrupts 3 ...
Page 143: ...IV Chapter 4 Clock Mode Voltage Control 4 ...
Page 175: ...V Chapter 5 Watchdog Timer WDT 5 ...
Page 180: ...Chapter 5 Watchdog Timer WDT V 6 Operation ...
Page 181: ...VI Chapter 6 Power Supply Voltage Detection 6 ...
Page 189: ...VII Chapter 7 I O Port 7 ...
Page 248: ...Chapter 7 I O Port VII 60 Port 8 ...
Page 249: ...VIII Chapter 8 8 bit Timer 8 ...
Page 282: ...Chapter 8 8 bit Timer VIII 34 8 bit Timer Cascade Connection ...
Page 283: ...IX Chapter 9 16 bit Timer 9 ...
Page 346: ...Chapter 9 16 bit Timer IX 64 IGBT Output with Dead Time ...
Page 347: ...X Chapter 10 General Purpose Time Base Free Running Timer 10 ...
Page 361: ...XI Chapter 11 RTC Time Base Timer RTC TBT 11 ...
Page 371: ...XII Chapter 12 Real Time Clock RTC 12 ...
Page 389: ...XIII Chapter 13 Serial Interface 13 ...
Page 458: ...Chapter 13 Serial Interface XIII 70 IIC Communication ...
Page 459: ...XIV Chapter 14 DMA Controller 14 ...
Page 472: ...Chapter 14 DMA Controller XIV 14 DMA Data Transfer ...
Page 473: ...XV Chapter 15 Buzzer 15 ...
Page 479: ...XVI Chapter 16 A D Converter ADC 16 ...
Page 493: ...XVII Chapter 17 LCD 17 ...
Page 530: ...Chapter 17 LCD XVII 38 LCD Display Examples ...
Page 531: ...XVIII Chapter 18 ReRAM 18 ...
Page 538: ...Chapter 18 ReRAM XVIII 8 Command Library ...
Page 539: ...XIX Chapter 19 On Board Debugger 19 ...
Page 542: ...Chapter 19 On Board Debugger XIX 4 List of on board debugging functions ...
Page 543: ...XX Chapter 20 Appendix 20 ...