Texas Instruments C5535 DSPShield Hardware Reference Manual

C5535 DSPShield H/W Reference Manual

Version 0.1

C5535

DSP

SHIELD

Hardware Reference Manual

H/W Rev. A

In Collaboration with Stanford University

page i

C5535 DSPShield H/W Reference Manual

Version 0.1

Revision History

Version Date Author Notes

0.1 Aug 12, 2013 D. Garcia

NOTES:

1. Initial release.

2.

1

In Collaboration with Stanford University

page ii

C5535 DSPShield H/W Reference Manual

Version 0.1

Table of Contents

 C5535 DSPShield ...................................................................................................... 1

1

1.1 Key Features ...............................................................................................................1

1.2 DSPShield Architecture..............................................................................................2

1.3 User Control Elements ...............................................................................................3

1.4 DSPShield Application Photos ...................................................................................4

2 Power Management .................................................................................................. 4

2.1 External Power Interface ............................................................................................4

2.2 Internal Voltages ........................................................................................................6

2.3 Voltage Monitoring ....................................................................................................6

2.4 C5535 DSP Core Voltage ...........................................................................................7

3 C5535 DSP and Internal Peripherals ...................................................................... 7

3.1 Parallel and Serial Peripherals ....................................................................................7

3.2 Clock Sources .............................................................................................................8

3.3 ROM Bootloader ........................................................................................................9

3.4 /INT1, /INT0, XF, WAKEUP ..................................................................................10

3.5 USB Controller .........................................................................................................10

3.6 MMC/SDx Controller ...............................................................................................10

3.7 I2C ............................................................................................................................10

4 DSPShield Peripherals............................................................................................ 11

4.1 I2C GPIO Expander .................................................................................................11

4.2 OLED Display ..........................................................................................................14

4.3 TLV320ACI3204 Audio Codec ...............................................................................14

4.4 Micro SD Card Connector ........................................................................................14

4.5 DIP Switch Inputs, LEDs and Push Button Reset ....................................................14

4.6 DSP Expansion Connector .......................................................................................15

5 Emulation................................................................................................................. 16

5.1 FTDI FT2232H .........................................................................................................16

5.2 Power via XDS-USB ................................................................................................17

6 Arduino Interface .................................................................................................... 17

6.1 Arduino/DSPShield Interface Block Diagram .........................................................19

6.1.1 Interface Logic Levels ............................................................................... 19

6.1.2 Analog Inputs ............................................................................................ 20

6.2 Arduino/DSPShield Reset Multiplexing ..................................................................20

In Collaboration with Stanford University

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C5535 DSPShield H/W Reference Manual

Version 0.1

6.2.1 Default Configuration ................................................................................ 22

6.2.2 C5535 Isolated from ARD_RESETN pin ................................................. 23

6.2.3 C5535 Resets Arduino ............................................................................... 23

6.2.4 C5535 Self Resets ...................................................................................... 23

6.2.5 Emulator Only Resets the DSPShield ....................................................... 23

6.3 DSPShield UART Multiplexing ...............................................................................23

6.3.1 DSP Expansion Connector ........................................................................ 25

6.3.2 Arduino IO[1:0] ......................................................................................... 25

6.3.3 Emulator Serial Port .................................................................................. 25

6.4 Arduino/DSPShield I2C Interface ............................................................................26

6.5 Arduino SPI Interface ...............................................................................................26

6.5.1 Arduino Master/C5535 DSP Isolated ........................................................ 27

6.5.2 Arduino Slave/C5535 DSP Master ............................................................ 28

6.5.3 Arduino Isolated/C5535 DSP Master ........................................................ 28

7 Resistor Multiplexing Configurations ................................................................... 28

8 Stand-Alone Mode .................................................................................................. 30

9 Assembly Drawings and Schematics ..................................................................... 31



Reference documents

1

2

3

4

5

6

7

Title / source

TMS320C5535 Data Sheet
SPRS737B

TMX320C5535 Technical Reference Manual

SPRUH87C August 2011–Revised March 2012

TLV320AIC3204 Ultra Low Power Stereo Audio Codec
SLOS602B –SEPTEMBER 2008–REVISED OCTOBER 2012

TCA6416A I2C to GPIO Expander
SCPS194A – MAY 2009– REVISED NOVEMBER 2009

Dual High Speed USB to Multipurpose UART/FIFO IC
http://www.ftdichip.com/Support/Documents/DataSheets/ICs/DS_FT2232H.pdf

Arduino UNO Information
http://arduino.cc/en/Main/ArduinoBoardUno

OLED Display OSD9616P0992-10
http://osddisplays.com/

AUGUST 2011–REVISED MARCH 2012

In Collaboration with Stanford University

Owner Version

TI

TI

TI

TI

FTDI

Arduino

OSD
Display

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C5535 DSPShield H/W Reference Manual

Version 0.1

Acronyms Abbreviations and Definitions

Arduino
Arduino UNO
Arduino Leonardo
CCS
DC-DC
DSP
DNI
Energia
GPIO
I2C
I2S
IDE
LCD
LDO
MMC/SD
OLED
UART
XDS

Family of Open Hardware uC Boards
2chip Arduino uC Board
1chip Arduino uC Board
Code Composer Studio TI Emulation Software
Switching regulator
Digital Signal Processor
Do Not Install
Open Source software IDE for TI Processors
General Purpose Input Output
Inter-Integrated Circuit (2-pin serial bus)
Integrated Interchip Sound (4-pin serial bus for audio devices)
Integrated Development Environment
Liquid Crystal Display
Low Drop-Out regulator
Multimedia Card/Secure Digital (flash memory)
Organic Light Emitting Diode (Display)
Universal Asynchronous Receiver Transmitter (serial bus)
Extended Development System. JTAG Emulators for TI
Processors (embedded or external)

In Collaboration with Stanford University

page v

C5535 DSPShield H/W Reference Manual Version 0.1

1 C5535 DSPShield

The C5535 DSPShield is an evaluation board for the Texas Instruments TMS320C5535
Fixed-Point Digital Signal Processor (DSP). It is designed to be both a “Shield” (i.e.
daughter card) for the Arduino Open-Hardware family of microcontroller (uC) boards
and also a stand-alone development board. With a rich set of hardware features and a
connector for prototyping expansion, the C5535 DSPShield can be used to develop
applications such as

• Wireless Audio Devices (e.g., Headsets, Microphones, Speakerphones)

• Echo Cancellation Headphones

• Portable Medical Devices

• Voice Applications

• Industrial Controls

• Fingerprint Biometrics

• Software-defined Radio

1.1 Key Features

The key features of the C5535 DSPShield are shown in Figure 1. The features include:

 TI TMS320C5535AZHHA10 (100MHz) Digital Signal Processor
 TI TLV320AIC3204IRGBR Stereo Audio Codec with separate stereo in and

stereo out connectors

 Micro SD Card Connector
 USB 2.0 interface to the C5535 DSP
 OLED 96x16 pixel display
 Arduino Compatible Header Connectors
 Arduino Interface is compatible with Energia software IDE and API
 Embedded USB XDS100-V2 JTAG emulator with secondary serial port

o JTAG is compatible with TI Code Composer Studio software IDE
o Secondary serial port is compatible with Energia software IDE and API

 40-pin DSP Expansion Connector
 3 user controlled LEDs,
 4 user readable DIP switches
 1 hardware reset push button switch
 Flexible Power Sourcing

In Collaboration with Stanford University

page 1

C5535 DSPShield H/W Reference Manual Version 0.1

Figure 1. Key Features of the C5535 DSPShield

1.2 DSPShield Architecture

The C5535 DSP is a peripheral rich processor. However, to limit the pin count, the
C5535’s pins are heavily multiplexed. Depending on the application, the C5535 is
programmed with the appropriate internal peripherals routed to its external pins. The
DSPShield maintains this flexibility by using additional discrete multiplexers to connect
the C5535’s GPIO/peripheral pins to the appropriate points on the board. Additonal
flexibility can also be found in the power management for the board and in the
Arduino/DSPShield interface. The DSPShield block diagram is shown in Figure 2.

The DSPShield architecture consists of the following major blocks:

1. Power Management

2. The C5535 DSP and Internal Peripherals

3. DSPShield Peripherals

4. Arduino Interface

5. DSP Expansion Connector

6. XDS100-V2 Embedded Emulator

In Collaboration with Stanford University

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C5535 DSPShield H/W Reference Manual Version 0.1

P10 Arduino ICSP Male/Female Header 6.1
J1 Alternate JTAG Header when Embedded Emulator N/A 5.1
J2 Audio Codec MIC input 4.3
J3 Audio Codec Headphone output 4.3
JPA DSP-USB and/or XDS-USB +5V Input Select Jumper 2.1
JPB Arduino +5V Input/Output Select Jumper 2.1
JPC Arduino +3.3V Output ONLY Select Jumper 2.1
JPD Arduino IOREF Input/Output Select Jumper 6.1.1
JPE Internally generated Ardino IOREF +5V or +3.3V Select Jumper 6.1.1
JPF XDS-USB +5V Connector Select Jumper 5.2
LED-XF C5535 XF Status 3.3, 4.5
LED0 General Purpose LED 4.5
LED1 General Purpose LED 4.5
LED2 General Purpose LED 4.5
XDS-LED Emulator Connected Status 5.1

Table 1. User Control Elements

1.4 DSPShield Application Photos

Inset photographs here.

 DSPShield + Arduino UNO
 DSPShield + Arduino UNO + Arduino Shield (suggestions?)
 DSPShield + Arduino Leonardo using 2 USB cables
 DSPShield + DSP Daughter Card (Audio Shield)
 DSPShield + Arduino Shield + DSP Daughter Card
 Other???

2 Power Management

The DSPShield requires a single +5V source. All other required voltages used on the
board are derived from this source.

2.1 External Power Interface

The +5V source can come from the DSP-USB connector (P1), XDS-USB connector (P9),
or from the Arduino Power Header (P7). The DSPShield power management block
diagram is shown in Figure 3. Jumpers JPA, JPB, JPC and JPF control the multiplexing
of power sources into and out of the board. Some common power management
configurations are listed in Table 2.

NOTES:

1. Schottky diodes allow both USB cables to be connected at the same time.

However, the inclusion of the diodes in the power path drops the nominal +5V to
about +4.3V due to the diode voltage drop.

2. The DSPShield does not use the +3.3V from the Arduino Power Header.

However, the DSPShield can source it.

In Collaboration with Stanford University

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C5535 DSPShield H/W Reference Manual Version 0.1

2.2 Internal Voltages

There are a number of voltages that can be found on the DSPShield. They are derived
from various ICs and can be monitored at certain points. Table 3 lists the voltages, test
points and the devices/functions powered by the voltages.

Voltage Test Point Source Device/Functions

+5V TP8 External 1. LMR10510X DC-DC Regulator

2. ARD_INTF_VCC

3. ARD_5V (sourcing)

+3.3V TP9 LMR10510X DC-

DC Regulator (VR1)

+1.8V TP5, TP6 Internal AIC3204

LDO

+1.3V TP10 LP3982 LDO (VR2) 1. C5535 CVDDRTC

+1.3V

(C5535)

+1.3V

(C5535)

+1.3V

(C5535)

+1.8V

(FT2232H)

+7.3V Pint 1 of C70 Internal OLED DC-

GND TP11 - 1. Digital Ground

AGND0 TP7 - 1. AIC3204 Analog Ground

Pin 1 of C19

Or TP3

Pin 1 of C45 C5535 USB_LDOO 1. C5535 USB_VDDA1P3

Pin 1 of C53 C5535 ANA_LDOO 1. C5535 VDDA_ANA

Pin 1 of C125 FTDI FT2232H

C5535 DSP_LDOO 1. C5535 CVDD (0 OHM resistor mux

VREGOUT

DC regulator

Table 3. DSPShield Voltages and Grounds

1. C5535 USB_VDDOSC

2. C5535 USB_VDDA3P3

3. C5535 USB_VDDPLL

4. C5535 DVD_DRTC

5. C5535 LDOI

6. C5535 DVDDIO

7. All Muxes

8. SD Card

9. GPIO Expander 2

10. AIC3204 IOVDD

11. ARD_INTF_VCC

12. ARD_3.3V (sourcing)

13. DSP Expansion Header +3.3V

14. Emulator +3.3V

1. AIC3204 AVDD, TP5

2. AIC3204 DVDD, TP6

2. C5535 CVDD (0 OHM resistor mux

selectable)

3. GPAIN CLAMP DIODES

selectable. DEFAULT configuration)

2. C5535 USB_VDD1P3

2. C5535 VDDA_PLL

1. FT2232H VCORE

1. OLED Display

2.3 Voltage Monitoring

The output voltages of the LMR10510X DC-DC (+3.3V) regulator and the LP3982
(+1.3V) LDO regulator are monitored by a TPS386596L33 Quad Reset Supervisory IC.

In Collaboration with Stanford University

page 6

C5535 DSPShield H/W Reference Manual Version 0.1

If either voltage drops below certain thresholds, the TPS65001’s active low open-drain
reset output will go low and reset the C5535 DSP and the DSPShield.

2.4 C5535 DSP Core Voltage

The C5535 DSP’s +1.3V Core Voltage, CVDD, can be driven either by its internal LDO
or by the LP3982 LDO. The selection is accomplished by populating certain
combinations of resistors R25, R26, R27 and R28. The two options are listed in Table 5.

CVDD = C5535 DSP_LDOO
(DEFAULT )

CVDD = LP3882 LDO

Table 4. C5535 DSP Core Voltage Selection

R25 = DNI
R26 = 0 Ohm Resistor
R27 = 0 Ohm 1/8W Resistor
R28 = DNI
R25 = 10.0K Ohm Resistor
R26 = DNI
R27 = DNI
R28 = 0.0 Ohm 1/8W Resistor

3 C5535 DSP and Internal Peripherals

The C5535 DSP is a high-performance, low-power, fixed-point Digital Signal Processor.
It has dual multipliers, dual ALUs, and a tightly coupled FFT hardware accelerator for
performing math intensive signal processing algorithms. It has a multiple I/O peripherals
that allow it to easily connect to serial Analog to Digital Converters, Digital to Analog
Converters and integrated codecs.

3.1 Parallel and Serial Peripherals

The C5535 DSP’s internal External Bus Selection Register (EBSR) determines which of
the following: LCD controller, I2S0, I2S1, I2S2, I2S3, UART, SPI, MMC/SD and GPIO
signals appear at the chip’s multiplexed GPIO pins. These peripherals can be grouped
into 3 groups as shown in Tables 5a, 5b and 5c. For each group, only one mode of
operation is available at a given time. Note that the DSPShield architecture further limits
the group mode selection.

PP MODE Multiplexed I/O Board Level limitations

Modes
0,2,3,4,5

Mode 1

-

SPI/I2S2/UART/6 GPIO Fully Supported.

In Collaboration with Stanford University

Not Supported

- I2S2 multiplexed between AIC3204 and DSP

Expansion Connector.

- UART multiplexed between Arduino, XDS

Serial Port and DSP Expansion connector.

- SPI multiplexed between Arduino and DSP

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C5535 DSPShield H/W Reference Manual Version 0.1

Expansion connector.

- GPIO[12:15] routed directly to DSP

Expansion connector.

- GPIO16 routed to the DSP Expansion

Connector IF R67 is Installed and R66 is Not
Installed (This is not the Default)

- GPIO17 routed to the DSP Expansion

Connector IF R69 is Installed and R68 is Not
Installed (This is not the Default)

Mode 6

SPI/I2S2/I2S3/6 GPIO Fully Supported.

- I2S2 multiplexed between AIC3204 and DSP

Expansion Connector.

- I2S3 routed to DSP Expansion Connector

when UART_MUX_SEL=0.

- SPI multiplexed between Arduino and DSP

Expansion connector.

- GPIO[12:15] routed directly to DSP

Expansion connector.

- GPIO16 routed to the DSP Expansion

Connector IF R67 is Installed and R66 is Not
Installed (This is not the Default)

- GPIO17 routed to the DSP Expansion

Connector IF R69 is Installed and R68 is Not
Installed (This is not the Default)

Table 5a. C5535 PPMODE

SP1

Multiplexed I/O Board Level limitations

MODE

Mode 0,1,2

SD1/I2S1/GPIO[6:11] Fully Supported.

- All signals are routed directly to the DSP

Expansion Connector.

Table 5b. C5535 SP1MODE

SP0

Multiplexed I/O Board Level limitations

MODE

Mode 0 SD0 SD0 signals are dedicated to the SD Card Connector
Modes 1, 2

-

Not Supported

Table 5c. C5535 SP0MODE

3.2 Clock Sources

The C5535 DSP has 3 input clock sources: USB_MXI pin, CLKIN pin, and an internal
Real Time Clock (RTC). The USB_MXI input is connected to a 12 MHz oscillator and is
the clock source for all USB peripheral activity. The CLKIN input is also connected to a
12 MHz oscillator while the RTC is connected to a 32.768 KHz crystal. Either CLKIN or

In Collaboration with Stanford University

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C5535 DSPShield H/W Reference Manual Version 0.1

the RTC can be the reference source for the C5535 DSP’s system clock generator.
Resistors R8, R9, R10 and R59 select the source as shown in Table 6. The different
clocks within the system clock generator block can be output on the C5535 DSP’s
CLKOUT pin and monitored at Test Point TP1.

System Clock Generator

Resistor Select

Reference Source

12MHz External Oscillator
(Default)

32.768 RTC R8=0 Ohm, R9=DNI, R10=0 Ohm, R59=DNI

R8=DNI, R9=10K Ohm, R10=DNI, R59=0 Ohm

Table 6. System Clock Generator Reference Source Select

3.3 ROM Bootloader

The C5535 DSP has an on-chip ROM Bootloader (RBL). It samples the following
interfaces, in order, looking for a boot signature: SPI EEPROM, I2C EEPROM,
MMC/SD0 AND UART/USB. Once a boot signature is detected, the C5535 DSP will
download the boot image and then jump to the entry point specified in the image. For the
DSPShield, the SD0 peripheral connected to the micro SD Card connector is the default
boot source. Figure 4 shows the Bootloader Software Architecture (from the C5535 DSP
datasheet). In the case where no boot source is found, the LED_XF will remain lit.

Figure 4. Bootloader Software Architecture

In Collaboration with Stanford University

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slave devic

DSP-USB

p

3.6

The
and
the
Boot
mult

Fi

3.7

The
com

MMC/S

5535 DSP
D1. Interfa
icro SD ca
oader. Inte

plexed pins

e 5. Micro

I2C

2C periphe

liant with t

x Contr

has two em

e SD0 is c
d is the def
face SD1 is

MMC1/I2S

SD Card P

al provides

e Philips S

ller

edded Mul
nnected to
ult boot so
routed to th

1/GPIO[11:

eripheral

an interface

miconduct

imedia Car

micro SD

rce for the

DSP Exp
].

between th
rs I2C-bus

/Secure Di

ard adapter

5535 DSP’

nsion Conn

DSP and o
pecificatio

ital Contro

P2. For th

s on-chip R

ctor as par

ther device

(version 2.

lers, SD0
DSPShield

M

of the

that are

1). The

,

In Collab

ration with

tanford U

iversity

page 10