VNC2-64L1B Datasheet, PDF (45/90 Pages) Future Technology Devices International Ltd. – VINCULUM-II EMBEDDED DUAL USB HOST CONTROLLER IC

SS#
MOSI
MISO
Document No.: FT_000138
VINCULUM-II EMBEDDED DUAL USB HOST CONTROLLER IC Datasheet
Version - 1.2
Clearance No.: FTDI# 143
8 bit CMD
STATUS
R0
STATUS
R1
Figure 6-6 Full Duplex Data Master Read
The command and status formats for this mode can be seen in Figure 6-7 below with a description of
each field in Table 18:
Command:
A2
A1
A0 R/W#
Z
Z
Z
Z
Status:
Z
Z
Z
Z
TXE
RXF
ACK
Z
Figure 6-7 SPI Command and Status Structure
Field
Description
A2:A0
Address of slave being used in a multi-slave environment. This would typically be
used in the scenario where a shared data bus is used.
R/W#
Set to ‘1’ for a read and ‘0’ for a write.
Z
Tri-stated.
TXE
Transmit Empty.
When ‘1’ the Slave transmit buffer has no new data to transmit.
When ‘0’ the Slave transmit buffer does have new data.
RXF
Receive Full.
When ‘1’ the Slave receive buffer has new data which has not been read yet.
When ‘0’ the Slave receive buffer is empty and can be safely written to.
ACK
Set to ‘1’ when a Slave has correctly decoded its address.
Table 18 SPI Command and Status Fields
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