System-in-Package Technology: Making it Easier to Build Your Own Linux Computer. Jason Kridner Erik Welsh 03/12/2018

Transcription

1 System-in-Package Technology: Making it Easier to Build Your Own Linux Computer Jason Kridner Erik Welsh 03/12/2018

2 The SBC Prototyping Revolution Proliferation of prototyping boards Huge array of Processors Every kind of connector Add-on boards for additional functionality Developing communities Support for new users Collaboration for experienced developers Exposure to Linux Development of drivers Open source projects

3 Software Drives Hardware Decisions Software developers must be involved in Hardware development If there is no SW for a piece of HW, then don t use it Many platforms provide great starting point for SW development Focus on value added feature differentiation Re-writing drivers does not add value Don t allow changes in HW for the sake of changing HW SW impact needs to be understood With great power, comes great responsibility Choosing a platform with Open Hardware Using components that can be obtained from Distribution / in small quantities Hardware should also focus on value added features Routing DDR does not add value

4 Mind the Gap Moving from Prototype to Product Developing custom PCB Smaller is better but smaller is harder Open hardware help development; known good solutions Migrating Software Porting from development board to final components Bring up & Provisioning Doing more with less Smaller teams Need tools that reduce time and effort Photo credits: Dilbert by Scott Adams

5 System-in-Package provides simple Linux HW Solutions Minimum Hardware Required to Run Linux Connect power inputs Connect clock inputs Clock Select boot mode Provide Linux boot image Power Boot Media Proven Linux solution Like working with a microcontroller but now with the power of Linux Boot Mode

6 Moving up from a microcontroller can be scary Microcontroller System Block Diagram Power Management CLK JTAG Provisioning µcontroller WiFi / BLE Sensors User I/O Motor / Accuator Becomes.

7 Typical Microprocessor System Block Diagram Microprocessor Subsystem WiFi / BLE Power Management CLK Flash Provisioning AC USB AC USB L1 INT_LDO VDCDC1 BYPASS VIN_DCDC1 L2 VDCDC2 VIN_DCDC2 L3 VIN_DCDC3 VDCDC3 VIN_LDO AGND PGND LS1_IN LS2_IN VIO SYS Bat VLDO1 VLDO2 LS1_OUT TPS65217C LS2_OUT SCL SDA PWR_EN PGOOD LDO_PGOOD nint nwakeup (SYS) (1.8v) (3.3v) (1.8v) (3.3v) (1.5v) (1.1v) (1.1v) IN EN TL5209 GN D VDDS_DDR VDD_MPU VDD_CORE VDDS VDDS_RTC OUT ADJ/BY P VDDA_ADC VDDS_OSC VDDS_PLL_DDR VDDS_PLL_MPU VDDS_PLL_CORE_LCD VDDS_SRAM_MPU_BB VDDS_SRAM_CORE_BG VDDA1P8V_USB0 VDDSHVx (3.3V) VDDA3P3V_USB0 I2C0_SCL I2C0_SDA PMIC_PWR_EN PWRONRSTN RTC_PWRONRSTN EXTINTn EXT_WAKEUP (3.3V) AM335x DDR_D8 DDR_D15 DDR_DQM1 DDR_DQS1 DDR_DQSn1 DDR_D0 DDR_D7 DDR_DQM0 DDR_DQS0 DDR_DQSn 0 DDR_CLK DDR_CLKn DDR_ODT DDR_CSn0 DDR_BA0 DDR_BA1 DDR_BA2 DDR_A0 DDR_A15 DDR_CASn DDR_RASn DDR_Wen DDR_CKE DDR_RESE Tn DDR_VRE F DDR_VTP DQU0 DQU7 DMU DQSU DQSU# DQL0 DQL7 DML DQSL DQSL# CK CK# ODT CS# BA0 BA1 BA2 A0 A15 CAS# RAS# WE# CKE RESET# ZQ DDR_VREF DQ VREFCA DDR3 Sensors User I/O Motor / Accuator USB / Ethernet NV Storage (emmc / Flash) How can we simplify this complexity?

8 System-in-Package = Processor Memory Standard BGA

9 What is System-in-Package Attached Die Discrete Components Substrate Pins

10 Power Dissipation High RF Why Can t We Just Use an SoC? Clock Frequency System-In-Package (SiP) Integrates Best of All Processes Power Low SoC Compromise in all Areas RF Power Processor Sensor Memory Analog Transistor Density Low Memory Processors Voltage Sensors Analog High

11 OSD3358 SiP Integration DDR3 SDRAM 800MHz All Needed Resistors, Capacitors, and Inductors TI Sitara AM335x Cortex-A8 1GHz OSD mm 2 BeagleBone Black Board OSD3358 SiP TI TL5209 LDO 3.3V Out TI TPS65217C PMIC Vin: Battery, 5VDC, USB Vout: 1.8V, 3.3V, Sys_Vout

12 A Closer Look at a SiP Manufactured SiP 6 Layer Substrate Cross-Section SEM Picture of SiP

13 PocketBeagle Forums: News: Based on Octavo Systems OSD3358-SM SiP ARM 1-GHz 512 MB DDRs RAM integrated ARM Cortex-M MHz RISC Programmable Real-time Units (PRU) Integrated power management Connectivity Bootable microsd card slot High speed USB 2.0 OTG (host/client) control signals Dual 36-pin expansion headers 8 analog inputs 1.8V and 3.3V ) 44 digital GPIOs 3 UARTS 2 I2C 2 SPI 4 PWM 2 QEP 2 CAN $25 56mm x 35mm x 5mm

14 PocketBeagle Block Diagram PocketCape Header (P1) PocketCape P1 Signals User I/O: PWR PB JTAG JTAG Pads OSD335x-SM SiP µusb Host Connector 5 Volts USB0 Contains: AM3358 TPS65217C TL5209 EEPROM GPIO User I/O: 4 LEDs MMC0 µsd Card Connector PocketCape P2 Signals PocketCape Header (P2)

15 PocketBeagle Schematics

16 Simplified Layout All Signals Escaped in a Single Layer 6 mil Trace Width 6 mil Space All Power Domains and Internal Signals located in the center for easy connection

17 PocketBeagle Layout Open Source Schematics & Layout 4 layers PCB 6 mil trace / 6 mil space 15 mil drill / 25 mil via

18 Simplified Board Bring Up Process Hardware Bring Up Verify Power Isolation (ie your power rails are not shorted to ground Don t release the magic smoke) Software Bring Up Download Latest Image from BeagleBoard.org Modify the device tree to meet your needs Power up the board and check that everything boots properly You don t worry about Bad voltages to the processor or DDR DDR not working

19 Modifying Your Device Tree Development boards provide good device tree infrastructure Majority of your device tree is already done for you Only update the items that are different for your board Many examples to mine for information / help Prototyping can be done with device tree overlay Allows testing on your SBC prototyping board

20 Using a SiP in your Linux Computer Design Will: Bring you 100+ components in one package Makes board design faster, simpler and easier to add your own new features Ensures easy board bring-up Give you the heart of the Computer Hardware in a single BGA package Lower cost PCB, fewer board layers, single sided Easy to manufacture with - Some have even hand soldered it! Bridge the gap between Prototype and Production Open Hardware + Open Source Software Easy migration from SBC prototyping board to your custom PCB

21 Thank You For more information come to our table at ELC Technical Showcase