FT2232D datasheet(44/56 Pages) FTDI

Part #	FT2232D

Description	Dual USB UART/FIFO I.C.

PDF	56 Pages

Scroll/Zoom	100%

Manufacturer	FTDI [Future Technology Devices International Ltd.]

Direct Link	http://www.ftdichip.com

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44 / 56 page

DS2232D Version 0.91

FT2232D Dual USB UART / FIFO I.C.

Figure 29 - MCU Host Bus Emulation Mode Signal Timing - Write Cycle

OSC

A15..A8

AD7..0

ALE

CS#

WR#

High Address

Low Address

Data

t9 t10

t11

IORDY

Time

Description

High address byte is placed on the bus if the extended write is used.

Low address byte is put out.

1 clock period for address is set up.

ALE goes high to enable latch. This will extend to 2 clocks wide if IORDY is low.

ALE goes low to latch address and CS# is set active low.

Data driven onto the bus.

1 clock period for data setup.

WR# is driven active low. This will extend to 6 clocks wide if IORDY is low.

WR# is driven inactive high.

t10

CS# is driven inactive, 1/2 a clock period after WR# goes inactive

t11

Data is held until this point, and may now change

FT2232D Datasheet(PDF) 44 Page - Future Technology Devices International Ltd.