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ST7265X bảng dữ liệu(PDF) 66 Page - STMicroelectronics

tên linh kiện ST7265X
Giải thích chi tiết về linh kiện  LOW-POWER, FULL-SPEED USB 8-BIT MCU WITH 32K FLASH, 5K RAM, FLASH CARD I/F, TIMER, PWM, ADC, I2C, SPI
PDF  166 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST7265X bảng dữ liệu(HTML) 66 Page - STMicroelectronics

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USB INTERFACE (Cont’d)
USB Endpoint RAM Buffers
There are five bidirectional Endpoints including
one control Endpoint 0. Endpoint 1 and Endpoint 2
are counted as 4 bulk or interrupt Endpoints (two
IN and two OUT).
Endpoint 0 and Endpoint 1 are both 2 x 16 bytes in
size. Endpoint 2 is 2 x 64 bytes in size and can be
configured to physically target different USB Data
Buffer areas depending on the MOD[1:0] bits in
the CTLR register (see Figure 41, Figure 42 and
Figure 43).
The USB Data Buffer operates as a double buffer;
while one 512-byte block is being read/written by
the DTC, the USB interface reads/writes the other
512-byte block.
The management of the data transfer is performed
in upload and download mode (2 x 512 byte buff-
ers for Endpoint 2) by the USB Data Buffer Manag-
er.
Figure 41. Endpoint 2 Normal Mode selected by (MOD[1:0] Bits = 00h)
Figure 42. Endpoint 2 Download Mode selected by MOD[1:0] Bits = 10b
Endpoint 2 Buffer OUT
Endpoint 1 Buffer IN
Endpoint 1 Buffer OUT
Endpoint 0 Buffer IN
Endpoint 0 Buffer OUT
Endpoint 2 Buffer IN
16 Bytes
16 Bytes
16 Bytes
16 Bytes
64 Bytes
64 Bytes
1550h
155Fh
156Fh
157Fh
158Fh
15CFh
160Fh
USB DATA
USB DATA
USB DATA
USB DATA
USB DATA
512-byte buffer
as 64-byte slices
512-byte buffer
as 64-byte slices
64-byte buffer
1650h
1A4Fh
15CFh
Endpoint 2 Buffer IN
Endpoint 2 Buffer OUT
158Fh
1550h
Endpoint 1 Buffer OUT
Endpoint 1 Buffer IN
Endpoint 0 Buffer OUT
Endpoint 0 Buffer IN
1590h
1



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