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UPSD3422 bảng dữ liệu(PDF) 165 Page - STMicroelectronics

tên linh kiện UPSD3422
Giải thích chi tiết về linh kiện  Turbo Plus Series Fast Turbo 8032 MCU with USB and Programmable Logic
PDF  293 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
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UPSD3422 bảng dữ liệu(HTML) 165 Page - STMicroelectronics

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uPSD34xx
USB interface
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USB Endpoint Select Register (USEL)
Endpoints share the same XDATA space for FIFOs as well as the same SFR addresses
for Control and FIFO Valid Size registers. The USB Endpoint Select Register (see
Table 82) is used to select the desired direction and endpoint that is accessed when
reading or writing to the FIFO XDATA address space. This register is also used to
select the direction and Endpoint when accessing the USB Endpoint Control Register.
Table 82.
USB endpoint select register (USEL 0EFh, reset value 00h)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
DIR
–
–
–
–
EP[2]
EP[1]
EP[0]
Bit
Symbol
R/W
Definition
7DIR
R/W
FIFO’s Direction Select Bit:
0: IN FIFO select
1: OUT FIFO select
6
–
–
Reserved
5
–
–
Reserved
4
–
–
Reserved
3
–
–
Reserved
2:0
EP
R/W
Endpoint Selects Bits:
0: Endpoint0
1: Endpoint1
2: Endpoint2
3: Endpoint3
4: Endpoint4



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