STC STC12C5A Series - User Manual

STC TECHNOLOGY Co.,Ltd.
STC12C5A08/16/32/60
8-bit micro-controller
This document contains information on a new product under development by STC.STC reserves the right to change or discontinue this
product without notice. 2007/12 version A1
Features ............................................................................................................................. 3
General Description .......................................................................................................... 4
Order Information: ............................................................................................................ 4 
Pin Description .................................................................................................................. 5
Pin Definition ............................................................................................................ 5
Pin Configuration ...................................................................................................... 7
Block Diagram .................................................................................................................. 9
Address Map ........................................................................................................... 10
Bits Description ...................................................................................................... 11
Memory ........................................................................................................................... 13
Organization ............................................................................................................ 13
RAM ....................................................................................................................... 13
Embedded Flash ...................................................................................................... 14
ALE OUTPUT ................................................................................................................ 15
Functional Description .................................................................................................... 17
I/O Port Configuration ............................................................................................ 17
Timer/Counter ......................................................................................................... 21
BAUD-RATE GENERATOR(BRT) ....................................................................... 25
Interrupt ................................................................................................................... 27
Watch Dog Timer .................................................................................................... 34
Universal Asynchronous Serial Port (UART) ......................................................... 36
Secondary Universal Asynchronous Serial Port (S2) ............................................. 40
Programmable Counter Array (PCA) ...................................................................... 45
Serial Peripheral Interface(SPI) .............................................................................. 55
Analog to Digital Converter .................................................................................... 63
Power Management ................................................................................................ 66
In System Programming and In Application Programming .................................... 69
In System Programming (ISP) ................................................................................ 69
In-Application Program (IAP) ................................................................................ 72
Instructions Set ................................................................................................................ 72
Absolute Maximum Rating (STC12C5Axx) .................................................................. 75
DC Characteristics (STC12C5Axx) ................................................................................ 75
Absolute Maximum Rating (STC12LE5Axx) ................................................................ 76
DC Characteristics (STC12LE5Axx) ............................................................................. 76
Package Dimension ......................................................................................................... 77
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Summary

Version History

Features

General Description

Order Information

Pin Description

Pin Definition

Defines pin mnemonics, package types, and their descriptions.

Pin Configuration

Block Diagram

Address Map

Bits Description

Memory

Organization

Illustrates the address space for STC12C5Axx RAM.

RAM Details

Details the 1280 bytes of RAM, direct and indirect addressing.

Embedded Flash

ALE Output

Access Timing Stretching

Controls access timing for MOVX instructions using BUS_SPEED register.

Functional Description

I;O Port Configuration

Describes the four I/O port modes and configuration registers.

Quasi-bidirectional Mode

Explains the quasi-bidirectional output mode with its pull-up transistors.

Open-drain Output Mode

Describes the open-drain output configuration, requiring external pull-up.

Input-only Mode

Describes the input-only configuration with Schmitt-triggered input.

Push-pull Output Mode

Describes the push-pull output mode for higher source current.

Timer;Counter Operation

Baud-Rate Generator (BRT)

Interrupt Handling

Watchdog Timer

Universal Asynchronous Serial Port (UART)

Secondary UART (S2)

Programmable Counter Array (PCA)

Serial Peripheral Interface (SPI)

SPI Typical Connections

Illustrates typical SPI connection configurations for master/slave devices.

Analog-to-Digital Converter (ADC)

Power Management

IDLE Mode

Describes entering and exiting the device's idle mode.

Idle Mode Power Saving

Details using the CLK_DIV register to reduce power in idle mode.

POWER-DOWN Mode

Explains entering and waking up from the power-down mode.

Flash Programming

In-System Programming (ISP)

Explains the architecture and process of In-System Programming.

In-Application Program (IAP)

Describes Read/Write nonvolatile data flash feature for storing parameters.

Instruction Set Overview

Absolute Maximum Ratings (STC12 C5 Axx)

DC Characteristics (STC12 C5 Axx)

Lists DC electrical parameters, limits, and test conditions.

Absolute Maximum Ratings (STC12 LE5 Axx)

DC Characteristics (STC12 LE5 Axx)

Lists DC electrical parameters for STC12LE5Axx, limits, and test conditions.

Package Dimensions

Document Version History

STC STC12C5A Series Specifications

General

Brand	STC
Model	STC12C5A Series
Category	Microcontrollers
Language	English