FT4232HL - TRAY FTDI, Future Technology Devices International Ltd, FT4232HL - TRAY Datasheet - Page 21
![IC USB UART/MPSSE QUAD HS 64LQFP](/photos/28/19/281917/mfg_ft4232hl_sml.jpg)
FT4232HL - TRAY
Manufacturer Part Number
FT4232HL - TRAY
Description
IC USB UART/MPSSE QUAD HS 64LQFP
Manufacturer
FTDI, Future Technology Devices International Ltd
Series
USBmadeEZ-FIFOr
Datasheet
1.FT4232HL_-_REEL.pdf
(45 pages)
Specifications of FT4232HL - TRAY
Features
USB to UART and/or SPI, I2C, JTAG
Number Of Channels
4, QUART
Fifo's
2048 Byte
Protocol
RS-232, RS-422, RS-485
Voltage - Supply
3 V ~ 3.6 V
With Auto Flow Control
Yes
With Modem Control
Yes
With Cmos
Yes
Mounting Type
Surface Mount
Package / Case
64-LQFP
For Use With
768-1031 - MOD USB HS FT4232H EVAL
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
FT4232HL - TRAY
4.4.1 MPSSE Adaptive Clocking
Adaptive clocking is a new MPSSE feature added to the FT24232H MPSSE engine.
The mode is effectively handshaking the CLK signal with a return clock RTCK. This is a technique used by
ARM processors.
The FT4232H will assert the CLK line and wait for the RTCK to be returned from the target device to
GPIOL3 line before changing the TDO (data out line).
Figure 4.5 Adaptive Clocking Interconnect
Figure 4.6: Adaptive Clocking waveform.
Adaptive clocking is not enabled by default.
See: AN_108 Command Processor for MPSSE and MCU Host Bus Emulation Modes.
RTCK
TDO
TCK
FT4232H
GPIOL3
TDO
TCK
Copyright © 2010 Future Technology Devices International Limited
FT4232H QUAD HIGH SPEED USB TO MULTIPURPOSE UART/MPSSE IC
RTCK
ARM CPU
TDO changes on falling
edge of TCK
Document No.: FT_000060
Clearance No.: FTDI#78
Datasheet Version 2.10
21