FT232HL FTDI [Future Technology Devices International Ltd.], FT232HL Datasheet - Page 31

• Manufacturer Part Number: FT232HL
• Description: FT232H Single Channel Hi-Speed USB to Multipurpose UART/FIFO IC
• Manufacturer: FTDI [Future Technology Devices International Ltd.]

4.6.2 FT1248: 1-bit interface
The FT1248 Interface transfers data over different bus widths (1-bit, 2-bit, 4-bit and 8-bit). Figure 4.21
and Figure 4.22 illustrates the waveform detailing the FT1248 write and read protocol operating in 1-bit
mode with flow control. Please refer to the application notes AN_167_FT1248 Parallel Serial Interface
Basics available at
bit and 8-bit modes.
Figure 4.10: FT1248 1-bit Mode Protocol (WRITE)
Figure 4.11: FT1248 1-bit Mode Protocol (READ)
MIOSIO[7:1]
MIOSIO[7:1]
MIOSIO[0]
MIOSIO[0]
SCLK
MISO
SS_n
SCLK
SS_n
MISO
RXF#
RXF#
TXE#
TXE#
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CMD3
CMD3
BUS TURNAROUND
BUS TURNAROUND
FT232H SINGLE CHANNEL HI-SPEED USB TO MULTIPURPOSE UART/FIFO IC
0
0
COMMAND PHASE
COMMAND PHASE
0
0
CMD2
CMD2
0
0
for more details regarding 1-bit without flow control, 2-bit, 4-
CMD1 CMD0
CMD1 CMD0
PULLED HIGH
PULLED HIGH
TXE#
RXF#
ACK
B7
ACK
B7
BUS TURNAROUND
BUS TURNAROUND
B6
B6
B5
B5
B4
B4
WRITE DATA
READ DATA
B3
B3
Document No.: FT_000288
Clearance No.: FTDI #199
B2
B2
Datasheet Version 1.3
B1
B1
B0
B0
BUS TURNAROUND
RXF#
RXF#
TXE#
TXE#
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