JTAG:TIAO/USB Multi Protocol Adapter User's Manual

The TIAO USB Multi Protocol Adapter (TUMPA) is a multi-functional USB communication adapter for hobbyists or engineers. The adapter is based on FDTI's flagship communication chip FT2232H, a USB 2.0 Hi-Speed (480Mb/s) to UART/FIFO IC. It has two multi-protocol synchronous serial engines (MPSSEs) which allow for communication using JTAG, I2C and SPI on two channels simultaneously. Technical Specifications


 * USB 2.0 Hi-Speed (480Mb/s)
 * JTAG / IEEE 1149.1 compatible.
 * JTAG Baudrate up to 30Mbits/sec (programmable)
 * On board voltage translation via 74LVC14T245 (can be enabled / disabled via software or jumper)
 * JTAG signals are 5V to 1.8V tolerant
 * ARM Muli-ICE 20-pin header compatible.
 * Separate SPI/I2C/Serial interfaces
 * Configurable output of RS232 (MAX3243) or TTL level for serial communication
 * Configurable auto power down for MAX3243
 * Target board can be powered by TUMPA (3.3V) or self powered (via jumper)
 * 4 on-board LEDs / PWR, Targt PWR, TX and RX
 * 1 2x10 20 PIN JTAG header
 * 1 2x5 10 PIN RS232 level 2.54mm IDC header
 * 1 2x6 10 PIN TTL level 2.54mm IDC header
 * 2 2x3 6 PIN SPI 2.54mm IDC header
 * 1 x DB9 connector (male, RS232 level)
 * Target board power jumper
 * Buffer chip enable jumper
 * RS232 chip auto power down jumper
 * RS232 or TTL output jumber
 * USB Hot-Plug / JTAG Hot-Plug.
 * USB over-current protection via on-board resetable fuse.
 * Strong ESD protection on USB signals.
 * Based on the FTDI FT2232H USB device.
 * Designed for FTDI MPSSE easy-to-use.
 * Free drivers for Linux.
 * Free drivers for Windows XP, Windows Vista and Windows 7
 * Support both 32 bit and 64 bit operating systems
 * Board dimension: 65.41mm X 58.55mm (2.58" X 2.31")

Board Layout



 * 1) DB9 male RS232 connector (Channel B)
 * 2) 2x3 standard 6 PIN 2.54mm IDC SPI connector (Channel A)
 * 3) RS232 Level 2.54mm IDC Header
 * 4) 2x10 standard 20 PIN 2.54mm IDC JTAG connector (Channel A)
 * 5) Auto power down jumper header for MAX3243 (force on or auto power down). Default force on (jumper is on pin 1and 2)
 * 6) Buffer enable jumper header for 74LVC16T245. Default is always enabled. (jumper on pin 2 and 3)
 * 7) Buffer chip 74LVC16T245 Vcc(B) power select jumper. Default is to power Vcc(B) by TUMPA (3.3V only) (jumper on pin 1 and 2)
 * 8) 3x8 PIN RS232 or TTL level serial communication jumpmer. Default is RS232 output (jumpers short top row and middle rows) (Channel B)
 * 9) 2x6 PIN TTL level 2.54mm IDC serial header (channel B)
 * 10) 2x3 PIN 2.54mm IDC SPI header (channel B)
 * 11) Status LEDs. From left to right: Power (indicates TUMPA is powered on), RX and TX
 * 12) Target board power LED. Indicates target board has power

DB9 Male RS232
This connector is enabled only if RS232/TTL jumpers are on RS232-OUT, see Serial RS232/TTL level Selection Jumper



Pin # 	Acronym 	Full name 	Direction 	Description 1 	DCD 	Data Carrier Detect 	<<-- 	Modem connected to another 2 	RxD 	Receive Data 	<<-- 	Receives bytes into PC 3 	TxD 	Transmit Data 	-->> 	Transmits bytes out of PC 4 	DTR 	Data Terminal Ready 	-->> 	I'm ready to communicate 5 	SG 	Signal Ground 		Ground/GND 6 	DSR 	Data Set Ready 	<<-- 	I'm ready to communicate 7 	RTS 	Request To Send 	-->> 	RTS/CTS flow control 8 	CTS 	Clear To Send 	<<-- 	RTS/CTS flow control 9 	RI 	Ring Indicator 	<<-- 	Telephone Line Ringing

SPI Connector 1
Pin # 	Description 1 	MISO 2 	Vcc (connected to on board 3.3V) 3 	SCK 4 	MOSI 5 	CS 6 	GND

RS232 Level 2.54mm IDC Header
This connector is enabled only if RS232/TTL jumpers are on RS232-OUT, see Serial RS232/TTL level Selection Jumper



For your convenience, we added this header. This header is inter connected to the DB9 connector. The pinout is different then the pinout of DB 9 connector, however the extra pin (PIN 10) is connected to on board 3.3V power. GND pin (PIN 9) and +3.3V PIN (PIN 10) are always enabled regardless the jumpers position of Serial RS232/TTL level Selection Jumper.

This is the pinout of the RS232 level 2.54mm IDC header:

Pin # 	Description 1 	RI 2 	DCD 3 	DSR 4 	CTS 5 	RX 6 	TX 7 	RTS 8 	DTR 9 	GND 10 	+3.3V

20 PIN JTAG Connector
Pin # 	Description 1 	VTAR 3 	nTRST 5 	TDI 7 	TMS 9 	TCK 11 	RTCK 13 	TDO 15 	RST 17 	DBGRQ 19 	DBGACK 2 	Not Connected 4, 6, 8, 10, 12, 14, 16, 18, 20 	GND

MAX3243 Auto Power Down Jumper


This jumper controls whether to always enable MAX3243 or let FT2232H automatically enables it (save power).


 * Jumper on PIN 1 and PIN 2: Always enable MAX3243
 * Jumper on PIN 2 and PIN 3: FT2232H (PWREN, PIN 60)controls when to enable or disable MAX3243.

Buffer Enable Jumper


This jumper controls whether to software enable/disable buffer chip (74LVC16T254).


 * Jumper on PIN 1 and PIN 2: Enable (Low)/Disable (High) 74LVC16T245 via FT2232H's ACBUS3 (PIN 29).
 * Jumper on PIN 2 and PIN 3: Always enable 74LVC16T245

Buffer Chip Power Selection Jumper


This jumper controls how to power the buffer / voltage translator chip (74LVC16T245)

The 74LVC16T245's Vcc(A) is connected to on board +3.3V. You can either power the Vcc(B) using on board +3.3V or powered by the target board. If powered by target board, please make sure the target board's power is in the range of +1.8V - +5.5V.


 * Jumper on PIN 1 and PIN 2: Power the buffer chip 74LVC16T245's Vcc(B) via the on board +3.3V source.
 * Jumper on PIN 2 and PIN 3: Power the buffer chio 74LVC16T245's Vcc(B) by target board. (PIN 3 of this header is connected to JTAG header's PIN 1)

Serial RS232/TTL level Selection Jumper


These jumpers allows you to have serial communication at either RS232 level or TTL level.


 * Jumpers short top row (RS232-OUT) and middle row (SELECT) (this is the default): enable RS232 level serial output. (thus DB9 Connector and RS232 Level 2.54mm IDC Header are enabled)
 * Jumpers short middle row (SELECT)and bottom row (TTL-OUT): enable TTL level serial output. (thus TTL Level Serial Connector enabled)

TTL Level Serial Connector
This connector is enabled only if RS232/TTL jumpers are on TTL-OUT, see Serial RS232/TTL level Selection Jumper



Pin # 	Description 1 	Tx 2 	Rx 3 	RTS 4 	CTS 5 	DTR 6 	DSR 7 	DCD 8 	RI 9 	+3.3V 10 	+5V (USB Power) 11, 12 	GND

The power pins (9, 10, 11 and 12) are always connected, regardless of the jumper positions of Serial RS232/TTL level Selection Jumper.

SPI Connector 2
Pin # 	Description 1 	MISO 2 	Vcc (connected to on board 3.3V) 3 	SCK 4 	MOSI 5 	CS 6 	GND

PWR/RX/TX LEDs



 * PWR: indicates the TUMPA board is connected to USB port of the computer and on board voltage regulator outputs +3.3V.
 * RX: Indicates FT2232H is receiving bytes from target via serial communication channel B
 * TX: Indicates FT2232H is transmitting bytes to target via serial communication channel B

Target Board Power LED



 * LED is ON: Target board (PIN 1 of JTAG Header) has power supply > 3.3V.
 * LED is OFF: Target board (PIN 1 of JTAG Header) has power supply < 3.3V or no power.

The VTAR can also be detected by software. If VTAR has voltage > 3.3V, ACBUS4 (PIN 30) of FT2232H will be LOW. Otherwise it will be HIGH.