FT4232H QUAD HIGH SPEED USB TO MULTIPURPOSE UART/MPSSE IC
Datasheet
Version 2.4
Document No.: FT_000060 Clearance No.: FTDI#78
2 FT4232H Block Diagram
120 MHz
Baud Rate
120 MHz
ADBUS0
ADBUS1
ADBUS2
ADBUS3
ADBUS4
ADBUS5
ADBUS6
ADBUS7
Generator
Dual Port TX
Buffer
2K Bytes
MPSSE/
Multi-
purpose
UART/bit-
bang
VCC 3V3 IN
Dual Port RX
Buffer
Controller
1.8 Volt
LDO
2K Bytes
V1.8OUT
Regulator
120 MHz
EECS
EESK
Baud Rate
120 MHz
120 MHz
120 MHz
BDBUS0
BDBUS1
BDBUS2
BDBUS3
BDBUS4
BDBUS5
BDBUS6
BDBUS7
Generator
EEPROM
Interface
Dual Port TX
Buffer
2K Bytes
MPSSE/
Multi-
purpose
UART/bit-
bang
EEDATA
Dual Port RX
Buffer
2K Bytes
OSCI
Controller
OSCO
USBDP
UTMI PHY
USBDM
RREF
USB Protocol Engine
And FIFO Control
120 MHz
Baud Rate
CDBUS0
CDBUS1
CDBUS2
CDBUS3
CDBUS4
CDBUS5
CDBUS6
CDBUS7
Generator
Dual Port TX
Buffer
2K Bytes
Multi-
purpose
UART/bit-
bang
Dual Port RX
Buffer
2K Bytes
RESET
Generator
RESET#
TEST
Controller
120 MHz
Baud Rate
DDBUS0
DDBUS1
DDBUS2
DDBUS3
DDBUS4
DDBUS5
DDBUS6
DDBUS7
Generator
Dual Port TX
Buffer
2K Bytes
Multi-
purpose
UART/bit-
bang
Dual Port RX
Buffer
Controller
2K Bytes
PWREN#
SUSPEND#
Figure 2.1 FT4232H Block Diagram
For a description of each function please refer to Section 4.
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4
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