VNC2-32Q1B-TRAY FTDI, Future Technology Devices International Ltd, VNC2-32Q1B-TRAY Datasheet - Page 62

• Manufacturer Part Number: VNC2-32Q1B-TRAY
• Description: IC USB HOST VINCULUM-II 32QFN
• Manufacturer: FTDI, Future Technology Devices International Ltd
• Series: Vinculum-IIr

Specifications of VNC2-32Q1B-TRAY

• Mfg Application Notes: Vinculum-II IO Cell Description AppNote Vinculum-II Debug Interface Description AppNote Vinculum-II IO Mux Explained AppNote Vinculum-II PWM Example AppNote Migrating Vinculum Designs AppNote
• Controller Type: USB 2.0 Controller
• Interface: SPI Serial, USB, UART
• Voltage - Supply: 1.62 V ~ 1.98 V
• Current - Supply: 25mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 32-QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: VNC2-32Q1A-TRAY; VNC2-32Q1A-TRAY

Document No.: FT_000138
VINCULUM-II EMBEDDED DUAL USB HOST CONTROLLER IC Datasheet
1.2
Version -
143
Clearance No.: FTDI#
6.6.2 Read / Write Transaction Asynchronous FIFO Mode
When in Asynchronous FIFO interface mode, the timing of read and write operations on the FIFO
interface are shown in Figure 6-22 and Table 29.
In asynchronous mode an external device can control data transfer driving FIFO_WR# and FIFO_RD#
inputs. In contrast to synchronous mode, in asynchronous mode the 245 FIFO module generates the
output enable EN# signal. EN# signal is effectively the read signal RD#.
Current byte is available to be read when FIFO_RD# goes low. When FIFO_RD# goes high, FIFO_RXF#
output will also go high. It will only become low again when there is another byte to read.
When FIFO_WR# goes low FIFO_TXE# flag will always go high. FIFO_TXE# goes low again only when
there is still space for data to be written in to the module.
Copyright © 2010 Future Technology Devices International Limited
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