UPSD3422_06 Datasheet, PDF (169/293 Pages) STMicroelectronics – Turbo Plus Series Fast Turbo 8032 MCU with USB and Programmable Logic

uPSD34xx
USB interface
● USB Setup Command Index and Value Registers (USCI and USCV)
When a Setup/Data packet is received over the USB, the 8 bytes of data received are
stored in a command buffer. The USB Setup Command Index Register (see Table 87)
determines which one of the eight bytes in the buffer is read using the USB Setup
Command Value Register (see Table 88).
Table 87.
Bit 7
–
USB setup command index register (USCI 0F5h, reset value 00h)
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
–
–
–
–
USCI[2:0]
Bit
Symbol
R/W
Definition
7:3
–
–
Reserved
2:0
USCI[2:0]
R/W
Index to access one of the 8 bytes of USB Setup Command
Data received with the last Setup transaction
Table 88.
Bit 7
USB setup command value register (USCV 0F6h, reset value 00h)
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
USCV[7:0]
Bit
Symbol
R/W
Definition
The nth byte of the 8 bytes of USB Setup Command Data
7:0
USCV
R/W
received with the last Setup transaction. The nth byte that is
read from this register is specified by the index value in the
USCI register.
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