FT4232HL-R FTDI, FT4232HL-R Datasheet - Page 21

USB-UART/MPSSE, 4232, QUAD, 64LQFP

FT4232HL-R

Manufacturer Part Number
FT4232HL-R
Description
USB-UART/MPSSE, 4232, QUAD, 64LQFP
Manufacturer
FTDI
Datasheet

Specifications of FT4232HL-R

No. Of Channels
4
Data Rate
480Mbps
Supply Voltage Range
1.62V To 1.98V, 2.97V To 3.63V
Operating Temperature Range
-40°C To +85°C
Digital Ic Case Style
LQFP
No. Of Pins
64
Svhc
No SVHC
Bridge Type
USB -
Rohs Compliant
Yes
Case Style
LQFP
Max Supply Voltage
3.63V
Min Supply Voltage
2.97V
Termination Type
SMD
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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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

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