Document Reference No.: FT_000367
UM232H Single Channel USB Hi-Speed FT232H Development Module
Datasheet Version 1.2
Clearance No.: FTDI# 198
4.2 Signal Descriptions
Pins marked * are EEPROM selectable
FT232H
Pin
ASYNC
Serial
(RS232)
TXD
RXD
RTS#
CTS#
DTR#
DSR#
DCD#
RI#
SYNC
245 FIFO
D0
D1
D2
D3
D4
D5
D6
D7
RXF#
TXE#
RD#
WR
SIWU#
CLKOUT
OE#
PWRSAV#
Pin functions (depends on configuration)
STYLE
ASYNC
245 FIFO
D0
D1
D2
D3
D4
D5
D6
D7
RXF#
TXE#
RD#
WR
SIWU#
ACBUS5
ACBUS6
PWRSAV#
ASYNC
Bit-bang
D0
D1
D2
D3
D4
D5
D6
D7
ACBUS0
WRSTB#
RDSTB#
ACBUS3
SIWU#
SYNC
Bit-bang
D0
D1
D2
D3
D4
D5
D6
D7
ACBUS0
WRSTB#
RDSTB#
ACBUS3
SIWU#
Fast Serial
interface
FSDI
FSCLK
FSDO
FSCTS
**
TriSt-UP
**
TriSt-UP
**
TriSt-UP
**
TriSt-UP
CPU Style
FIFO
D0
D1
D2
D3
D4
D5
D6
D7
CS#
A0
RD#
WR
SIWU#
Pin # Pin Name
13
ADBUS0
14
15
16
17
18
19
20
21
25
26
27
28
29
30
31
32
33
ADBUS1
ADBUS2
ADBUS3
ADBUS4
ADBUS5
ADBUS6
ADBUS7
ACBUS0
ACBUS1
ACBUS2
ACBUS3
ACBUS4
ACBUS5
ACBUS6
ACBUS7
ACBUS8
ACBUS9
MPSSE
TCK/SK
TDI/DO
TDO/DI
TMS/CS
GPIOL0
GPIOL1
GPIOL2
GPIOL3
GPIOH0
GPIOH1
GPIOH2
GPIOH3
GPIOH4
GPIOH5
GPIOH6
***
GPIOH7
FT1248
MIOSI0
MIOSI1
MIOSI2
MIOSI3
MIOSI4
MIOSI5
MIOSI6
MIOSI7
SCLK
SS_N
MISO
ACBUS3
ACBUS4
ACBUS5
ACBUS6
PWRSAV#
ACBUS8
ACBUS9
*
TXDEN
**
ACBUS0
**
ACBUS1
**
ACBUS1
**
ACBUS2
**
ACBUS2
*
RXLED#
**
ACBUS3
SIWU#
*
TXLED#
**
ACBUS5
**
ACBUS5
ACBUS6
PWRSAV#
**
ACBUS5
ACBUS6
PWRSAV#
**
ACBUS5
**
ACBUS5
**
ACBUS6
PWRSAV#
**
ACBUS6
PWRSAV#
**
ACBUS6
PWRSAV#
**
ACBUS8
**
ACBUS8
**
ACBUS8
**
ACBUS8
**
ACBUS8
**
ACBUS8
**
ACBUS8
**
ACBUS8
**
ACBUS9
**
ACBUS9
**
ACBUS9
**
ACBUS9
**
ACBUS9
**
ACBUS9
**
ACBUS9
**
ACBUS9
Table 4.1 : UM232H Signals
Pins marked ** default to tri-stated inputs with an internal 75KΩ (approx) pull up resistor to VCCIO.
Pin marked *** default to GPIO line with an internal 75KΩ pull down resistor to GND. Using the EEPROM this
pin can be enabled USBVCC mode instead of GPIO mode.
8
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