FT2232D datasheet(41/56 Pages) FTDI

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DS2232D Version 0.91

FT2232D Dual USB UART / FIFO I.C.

9.6 Multi-Protocol Synchronous Serial Engine (MPSSE) Mode Signal Descriptions and

Interface Configurations

MPSSE Mode is designed to allow the FT2232D to interface efficiently with synchronous serial protocols such

as JTAG and SPI Bus. It can also be used to program SRAM based FPGA’s over USB. The MPSSE interface is

designed to be flexible so that it can be configured to allow any synchronous serial protocol (industry standard or

proprietary) to be interfaced to the FT2232D. MPSSE is available on channel A only.

MPSSE is fully configurable, and is programmed by sending commands down the data pipe. These can be sent

individually, or more efficiently in packets. MPSSE is capable of a maximum sustained data rate of

5.6 Mega bits / s.

When Channel A is configured in MPSSE mode the IO signal lines are configured as follows :-

Pin#

(Channel A Only)

Signal

Type

Description

TCK/SK OUTPUT Clock signal Output

TDI/D0

OUTPUT Serial Data Out

TDO/DI

INPUT

Serial Data In

**Note 2

TMS/CS OUTPUT Select Signal Out

GPIOL0 I/O

General Pupose input / Output

**Note 2

GPIOL1 I/O

General Pupose input / Output

**Note 2

GPIOL2 I/O

General Pupose input / Output

**Note 2

GPIOL3 I/O

General Pupose input / Output

**Note 2

GPIOH0 I/O

General Pupose input / Output

**Note 2

GPIOH1 I/O

General Pupose input / Output

**Note 2

GPIOH2 I/O

General Pupose input / Output

**Note 2

GPIOH3 I/O

General Pupose input / Output

**Note 2

**Note 2 : In Input Mode, these pins are pulled to VCCIO via internal 200K resistors. These can be programmed to

gently pull low during USB suspend ( PWREN# = “1” ) by setting this option in the EEPROM.

Enabling

MPSSE mode is enabled using Set Bit Bang Mode driver command. A hex value of 2 will enable it, and a hex value of

0 will reset the device. See application note

AN2232L-02, “Bit Mode Functions for the FT2232D” for more details

and examples.

The MPSSE command set is fully described in application note

AN2232L-01 - “Command Processor For MPSSE

and MCU Host Bus Emulation Modes”.

FT2232D Datasheet(PDF) 41 Page - Future Technology Devices International Ltd.

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