VNC1L-1A-REEL FTDI, Future Technology Devices International Ltd, VNC1L-1A-REEL Datasheet - Page 19

• Manufacturer Part Number: VNC1L-1A-REEL
• Description: IC USB HOST CTLR VINCULUM 48LQFP
• Manufacturer: FTDI, Future Technology Devices International Ltd
• Series: Vinculumr

Specifications of VNC1L-1A-REEL

• Controller Type: USB 2.0 Controller
• Interface: SPI
• Voltage - Supply: 3 V ~ 3.6 V
• Current - Supply: 25mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 48-LQFP
• For Use With: 768-1006 - BOARD DEV FOR VINCULUM VNC1L-1A768-1005 - MOD USB FLASH DISK FILE TRANSFER768-1002 - MOD MCU-USB HOST CTLR 40-DIP768-1001 - MOD MCU-USB HOST CTLR 24-DIP27937 - MEMORY STICK DATALOGGER
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 768-1000-2

Figure 5.5 SPI Slave Mode Data Write
5.2.4 SPI Master Status Read Transaction
The VNC1L has a status byte which determines the state of the Receive and Transmit Buffers. The SPI
master must poll VNC1L and read the status byte.
The Start and Setup sequence is sent to VNC1L by the SPI master, see Figure 5.6. The VNC1L clocks out
its status byte on subsequent rising edge clock cycles from the SPI master. This is followed by a status
bit generated by VNC1L (also on the SDO) which will always be zero (indicating new data).
The meaning of the bits within the status byte sent by VNC1L during a Status Read operation is described
in Table 5.8.
The result of the Status Read transaction is only valid during the transaction itself.
Data read and data write transactions must still check the status bit during a Data Read or Data Write
cycle regardless of the result of a Status Read operation.
Table 5.8 SPI Status Read Byte – bit descriptions.
Bit
0
1
2
3
4
5
6
7
Description
RXF IRQEn
TXE IRQEn
RXF#
TXE#
-
-
-
-
Copyright © 2009 Future Technology Devices International Limited
Description
Receive Buffer Full
Transmit Buffer Empty
Receive Buffer Full Interrupt Enable
Transmit Buffer Empty Interrupt Enable
Vinculum VNC1L Embedded USB Host Controller IC Datasheet Version 2.02
Document Reference No.: FT_000030
Clearance No.: FTDI# 50
19