VNC1L-1A-TRAY FTDI, VNC1L-1A-TRAY Datasheet - Page 17

• Manufacturer Part Number: VNC1L-1A-TRAY
• Description: USB Interface IC USB Vinculum Host /Dev Ctrl IC LQFP-48
• Manufacturer: FTDI

Specifications of VNC1L-1A-TRAY

• Product Category: USB Interface IC
• Rohs: yes
• Operating Supply Voltage: 3.3 V
• Operating Supply Current: 25 mA
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: LQFP-48
• Minimum Operating Temperature: - 40 C
• Factory Pack Quantity: 250

Figure 5.3 SPI Slave Mode Timing
Table 5.5 SPI Slave Data Timing
5.2.2 SPI Master Data Read Transaction
The SPI master must periodically poll for new data in VNC1L Transmit Buffer. It is recommended that
this is done first before sending any command.
The Start and Setup sequence is sent to VNC1L by the SPI master, see Figure 5.4.
The VNC1L clocks out data from its Transmit Buffer on subsequent rising edge clock cycles provided by
the SPI master. This is followed by a status bit generated by VNC1L. The Data Read status bit is defined
in Table 5.6.
If the status bit indicates New Data then the byte received is valid. If it indicates Old Data then the
Transmit Buffer in VNC1L is empty and the byte of data received in the current transaction should be
disregarded.
Time
T1
T2
T3
T4
T5
T6
T7
Description
SCLK Period
SCLK High
SCLK Low
Input Setup Time
Input Hold Time
Output Hold Time
Output Valid Time
Copyright © 2009 Future Technology Devices International Limited
Vinculum VNC1L Embedded USB Host Controller IC Datasheet Version 2.02
Minimum
83
20
20
10
10
2
-
Typical
-
-
-
-
-
-
-
Maximum
20
-
-
-
-
-
-
Document Reference No.: FT_000030
Unit
ns
ns
ns
ns
ns
ns
ns
Clearance No.: FTDI# 50
17