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STR720 bảng dữ liệu(PDF) 187 Page - STMicroelectronics

tên linh kiện STR720
Giải thích chi tiết về linh kiện  ARM720T 16/32-BIT MCU WITH 16K RAM, USB, CAN, 3 TIMERS, ADC, 6 COMMUNICATIONS INTERFACES
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STR720 bảng dữ liệu(HTML) 187 Page - STMicroelectronics

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STR720 - BUFFERED SPI (BSPI)
187/401
Figure 23. BSPI Block Diagram
17.3.1
BSPI Pin Description
The BSPI is a four wire, bi-directional bus. The data path is determined by the mode of
operation selected. A master and a slave mode are provided together with the associated pad
control signals to control pad direction. These pins are described in Table 46 on page 187.
Table 46. BSPI pins
Pin Name
Description
SCK
The bit clock for all data transfers. When the BSPI is a master the SCK is output from the chip.
When configured as a slave the SCK is input from the external source.
MISO
Master Input/Slave Output serial data line.
MOSI
Master Output/Slave Input serial data line.
SS
Slave Select. The SS input pin is used to select a slave device. Must be pulled low after the
SCK is stable and held low for the duration of the data transfer. The SS on the master must be
deasserted high.This signal can be masked when in master mode-see register description of
CSR Reg3 bit 0
16 WORD RECEIVE
(16 bits)
MOSI
SCK
MISO
SS
SHIFT REGISTER
FIFO
S
M
M
S
PIN CONTROL
LOGIC
S
M
BSPI CONTROL LOGIC
BSPCLK
BSPCSR1
CLK
DATA BUS
16
16
16
16
16
16
BSPCSR2
16
16 WORD TRANSMIT
(16 bits)
FIFO
BSPCSR3
16
DMA INTERFACE
1



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