Atmel AVR AT90S2313 User Manual

71
AT90S2313
0839G–08/01
Figure 54. Serial Programming Waveforms
Note: a = address high bits
b = address low bits
H = 0 – Low byte, 1 – High Byte
o = data out
i = data in
x = don’t care
1 = Lock bit 1
2 = Lock bit 2
Note: 1. The signature bytes are not readable in lock mode 3, i.e. both Lock bits programmed.
Table 28. Serial Programming Instruction Set
Instruction
Instruction Format
OperationByte 1 Byte 2 Byte 3 Byte4
Programming Enable
1010 1100 0101 0011 xxxx xxxx xxxx xxxx Enable serial programming while
RESET
is low.
Chip Erase
1010 1100 100x xxxx xxxx xxxx xxxx xxxx Chip erase Flash and EEPROM
memory arrays.
Read Program Memory
0010 H000 xxxx xxaa bbbb bbbb oooo oooo Read H (high or low) data o from
program memory at word address
a:b.
Write Program Memory
0100 H000 xxxx xxaa bbbb bbbb iiii iiii Write H (high or low) data i to
program memory at word address
a:b.
Read EEPROM
Memory
1010 0000 xxxx xxxx xbbb bbbb oooo oooo Read data o from EEPROM memory
at address b.
Write EEPROM
Memory
1100 0000 xxxx xxxx xbbb bbbb iiii iiii Write data i to EEPROM memory at
address b.
Write Lock Bits
1010 1100 111x x21x xxxx xxxx xxxx xxxx Write Lock bits. Set bits 1,2 = “0” to
program Lock bits.
Read Signature Bytes 0011 0000 xxxx xxxx xxxx xxbb oooo oooo Read signature byte o at address b.
(1)

Atmel AVR AT90S2313 Specifications

General

Architecture	AVR
CPU	8-bit
Manufacturer	Atmel
Model	AT90S2313
Flash Memory	2 KB
SRAM	128 Bytes
EEPROM	128 Bytes
Clock Speed	Up to 10 MHz
I/O Pins	15
Timer	1 x 8-bit, 1 x 16-bit
Operating Temperature Range	-40°C to +85°C
Data Bus Width	8-bit
Communication Interfaces	USART
Package	SOIC
Series	AVR AT90S

Summary

Features

Pin Configuration

Pin Descriptions

Explains the function of each pin on the microcontroller.

Crystal Oscillator

Architectural Overview

Program and Data Addressing Modes

Explains how the MCU accesses memory.

Memory Access and Instruction Execution Timing

I/O Memory

Reset and Interrupt Handling

Describes reset sources and interrupt vectors.

Watchdog Timer

Details the Watchdog Timer functionality and control.

EEPROM Read/Write Access

UART

Data Transmission

Data Reception

Analog Comparator

I/O Ports

Memory Programming

Programming the Flash and EEPROM

Procedures for writing Flash and EEPROM.

Parallel Programming

Details the parallel programming interface and commands.

Serial Downloading

Explains serial programming via SPI.