Microchip ATmegaS64M1 Manual de Usario

Microchip No categorizado ATmegaS64M1

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 2020 Microchip Technology Inc. DS00003657A-page 1

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INTRODUCTION

This application note lists the Vectron high-reliability oscillator model numbers that have been characterized for use as

the External Clock of the ATmegaS64M1 series radiation tolerant microcontrollers. These oscillators are the only rec-

ommended external frequency sources for use as the ATmegaS64M1 External Clock. While other suppliers may offer

clocks that meet the specifications, they are not approved reference designs by Microchip, and, as such, the user must

complete his or her own qualification and analysis for fitness of use.

RECOMMENDED OSCILLATORS

The ATmegaS64M1 has three clock source options. This application note specifically addresses the external crystal

oscillators that are recommended for use with the External Clock. Two oscillator frequencies, 4 MHz and 8 MHz, are

recommended in the application note, though any frequency below 8 MHz may be used per Table 30-4 of the

ATmegaS64M1 data sheet. Four different reliability levels of the microcontroller are available. For each of these reliabil-

ity levels, the customer needs to ensure that the corresponding reliability level of the crystal oscillator is correctly spec-

ified to match the application. model numbers are defined in Eight individual oscillator Table 1 (one for each combination

of frequency and reliability level). These oscillators are directly coupled to the XTAL1 pad.

The models chosen are the most cost-effective solutions that meet the requirements of ATmegaS64M1 and the required

reliability level. The 1157 series oscillators recommended are from the Vectron Hi-Rel Oscillator standard OS-68338. All

the devices listed are 3.3V, CMOS, surface mount, 7 mm x 5 mm, ceramic leadless chip carrier oscillators. The subse-

quent paragraphs after Table 1 are provided for reference and compliance purposes.

TABLE 1: RECOMMENDED VECTRON HIGH-RELIABILITY OSCILLATOR MODELS AT TWO

EXTERNAL CLOCK FREQUENCIES

MCU Model Reliability Level External Clock Frequency Oscillator Model Number

ATmegaS64M1-KH-E Prototype (-E) 4 MHz 1157D4M00000BX

ATmegaS64M1-KH-MQ QML-Q equivalent 4 MHz 1157B4M00000BE

ATmegaS64M1-KH-SV QML-V equivalent 4 MHz 1157R4M00000BS

ATmegaS64M1-MA-HP HiREL Plastic 4 MHz 1157C4M00000BB

ATmegaS64M1-KH-E Prototype (-E) 8 MHz 1157D8M00000BX

ATmegaS64M1-KH-MQ QML-Q equivalent 8 MHz 1157B8M00000BE

ATmegaS64M1-KH-SV QML-V equivalent 8 MHz 1157R8M00000BS

ATmegaS64M1-MA-HP HiREL Plastic 8 MHz 1157C8M00000BB

Crystal Oscillators for ATmegaS64M1 Radiation Tolerant

Microcontroller External Clock Input

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DS00003657A-page 2  2020 Microchip Technology Inc.

COMPARISON OF ATMEGAS64M1 QUALITY FLOW REQUIREMENTS VS. OS-68338

SCREENING AND PEDIGREES

Due to differences in the requirements listed in MIL-PRF-38535 (for radiation hardened electronics) and MIL-PRF-

55310 (for crystal oscillators), exact matches in quality flow vs. screening levels and component pedigrees are not avail-

able. Table 2 summarizes available quality flows for the ATmegaS64M1 radiation tolerant microcontroller, and the rec-

ommended corresponding screening and pedigree levels for OS-68338 oscillators. Customers are encouraged to

review applicable specifications for mission critical applications to ensure full compliance.

COMPARISON OF ATMEGAS64M1 ELECTRICAL REQUIREMENTS VS. OS-68338

ELECTRICAL SPECIFICATIONS

Electrical performance requirements for the External Clock oscillator are defined in Table 30-2 and Table 30-3 of the

ATmegaS64M1 data sheet. Additional requirements have been derived from customer use cases. These requirements

are listed in Table 3, along with the corresponding electrical parameter specification from OS-68338.

TABLE 2: ATMEGAS64M1 QUALITY FLOW REQUIREMENTS VS. OS-68338 OSCILLATOR

SCREENING AND PEDIGREES

MCU Quality Flow Oscillator

Screening

Oscillator Component

Pedigree Description

Prototype (-E) X D

Engineering Model Hardware using high reliability

design with commercial grade components and non-

swept quartz.

QML-Q equivalent E B Military Grade Hardware using high reliability design

with military grade components and swept quartz.

QML-V equivalent S R Space Grade Hardware with 100 kRad die, space

grade components, and swept quartz.

Hirel Plastic (-HP) B C Military grade die and plastic packaging. Oscillator

uses military grade components and non-swept quartz.

TABLE 3: ELECTRICAL COMPLIANCE MATRIX FOR THE EXTERNAL CLOCK OSCILLATOR

Specification ATmegaS64M1 Microcontroller

Requirement OS-68338 Oscillator Specification

Operating Temperature –55°C to +125°C –55°C to +125°C

20-year Total Stability (Note 1) Not Defined ±100 ppm

Supply Voltage (VS) 3.3VDC 3.3VDC

Supply Voltage Tolerance ±0.3VDC ±0.33VDC

Voltage Low Logic Min. –0.5V 0V

Voltage Low Logic Max. VS x 0.1 VS x 0.1

Voltage High Logic Min. VS x 0.8 VS x 0.9

Voltage High Logic Max. VS + 0.5V VS

Duty Cycle 40% to 60% 45% to 55%

Rise and Fall Time Max. 1600 ns 5 ns

Total Ionized Dose 30 kRad 100 kRad

Single Event Latch-Up 62.5 MeV-cm2/mg 120 MeV-cm2/mg

Note 1: The ATmegaS64M1 data sheet does not specify a frequency stability requirement for the reference oscil-

lators. The recommended oscillators in this application note will maintain a fractional frequency error of

±100 ppm under all conditions for a 20 year operational life. Table 4 provides details on the frequency

budget. Note that while OS-68338 specification lists ±5 ppm for first-year aging, and ±2 ppm/year after

year one, due to the logarithmic nature of the aging curves, oscillators will comply with ±31 ppm total

aging over 20 years.

 2020 Microchip Technology Inc. DS00003657A-page 3

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ENCLOSURE OPTIONS

OS-68338 offers multiple enclosure options. The 1157 enclosure chosen for this application note, a surface mountable,

7 mm x 5 mm, ceramic leadless chip carrier, is the lowest cost solution in OS-68338. Other enclosures may be chosen

based on mission profiles, customer assembly and manufacturing guidelines, and customer quality requirements.

SUMMARY

The OS-68338 oscillators listed in Table 1 have been characterized and are recommended for use as the External Clock

for the ATmegaS64M1 radiation tolerant microprocessor. The oscillators meet all required performance parameters per

the ATmegaS64M1 data sheet and expected use cases. The oscillators are rated to similar radiation levels as the micro-

controller. Multiple alternate enclosure options are available and alternate frequencies below 8 MHz can be provided.

REFERENCES

OS-68838 Oscillator Specification:

https://www.vectron.com/products/military/xo/os68338.pdf

ATmegaS64M1 Radiation Tolerant Microcontroller Data Sheet:

http://ww1.microchip.com/downloads/en/DeviceDoc/ATmegaS64M1_datasheet_ds60001506b.pdf

TABLE 4: FREQUENCY STABILITY OF OS-68338 OSCILLATORS

Parameter Specification Maximum

Initial accuracy at +23°C ±15 ppm

Frequency Temperature Stability from +23°C reference ±50 ppm

Frequency vs. Voltage Tolerance ±4 ppm

20-year aging (including 100 kRad TID effects) ±31 ppm

Total cumulative frequency error for 20-year life ±100 ppm

Especificaciones del producto

Marca:	Microchip
Categoría:	No categorizado
Modelo:	ATmegaS64M1
Color del producto:	Wit
Pantalla incorporada:	Nee
Peso.:	3800 g
Ancho:	338 mm
Profundidad:	267 mm
Altura:	120 mm
Nivel de ruido:	35 dB
Peso del embalaje:	5800 g
Ancho del embalaje:	454 mm
Empaquetadura en profundidad:	497 mm
Altura del embalaje:	195 mm
Manual de usuario:	Ja
Fuente-de-alimentación:	AC
Apagado automático:	Ja
Colocación:	Desktop
Relación de aspecto original:	4:3
red LAN:	Ja
Modos de vídeo compatibles:	480i, 480p, 576i, 576p, 720p, 1080i, 1080p
Cables suministrados:	AC, VGA
Lector de tarjetas de memoria integrado:	Nee
Capacidad de zoom:	Ja
Guía de inicio rápido:	Ja
Posicionamiento en el mercado:	Presentatie
Brillo del proyector:	5500 ANSI lumens
Tecnología de proyección:	DLP
Resolución nativa del proyector:	XGA (1024x768)
Corrección Keystone, vertical:	40 °
Corrección Keystone, horizontal:	40 °
Adecuado para tamaños de pantalla:	30 - 300 "
Objetivo de distancia de proyección:	1.2 - 10 m
Rango de frecuencia horizontal:	31 - 92 kHz
Rango de frecuencia vertical:	48 - 120 Hz
Tamaño de la matriz:	0.67 "
Número de puertos USB 2.0:	1
Puerto(s) VGA (D-Sub):	3
Número de puertos HDMI:	2
Tipo de conexión en serie:	RS-232C
Audio-ingan (L, R):	1
Entrada de audio para PC:	Ja
Salida de audio de computadora:	Ja
Entrada de vídeo compuesto:	1
Entrada de S-Video:	1
Puerto DVI:	Nee
Número de puertos Ethernet LAN (RJ-45):	1
Enfocar:	Handmatig
tipo de zoom:	Handmatig
Diafragma (FF):	2.42 - 2.97
Rango focal:	20.9 - 31.05 mm
Vida útil de la fuente de luz.:	4000 uur
Tipo de fuente de luz:	Lamp
Opción de montaje de bloqueo de cable:	Ja
Tipo de ranura para candado de cable:	Kensington
Altavoces incorporados:	Ja
Energía promedio:	3 W
Número de altavoces incorporados:	1
Consumo de energía (en espera):	0.5 W
Consumo de energía (máx.):	370 W
Certificación:	IEC, UL, cUL
Relación de zoom:	1.5:1
Relación de lanzamiento:	1.43 - 2.14:1
RS-232C:	Ja
Conexión para adaptador de red:	Ja
Corriente de entrada:	Ja
Puerto RS-232:	1
3D:	Nee
Potencia de la lámpara:	310 W
Resoluciones de gráficos compatibles:	640 x 480 (VGA), 800 x 600 (SVGA), 1024 x 768 (XGA), 1280 x 1024 (SXGA), 1280 x 768 (WXGA), 1280 x 800 (WXGA), 1360 x 768 (WXGA), 1400 x 1050 (SXGA+), 1440 x 900 (WXGA+), 1600 x 1200 (UXGA), 1680 x 1050 (WSXGA+)
Relación de contraste (dinámica):	12500:1
Número de DisplayPorts:	1
Estuche de almacenamiento:	Ja
Frecuencia de escaneo del reloj de puntos:	150 MHz
Disipación de calor:	1263 BTU/h
Mando a distancia incluido:	Ja
Wifi.:	Nee
voltaje-de-entrada-de-CA:	100 - 240 V
Frecuencia-de-entrada-de-CA:	50 - 60 Hz
Temperatura de funcionamiento (TT):	5 - 35 °C
Baterias-incluidas:	Ja
Tipo-producto:	Projector met normale projectieafstand