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RM0319 датащи(PDF) 238 Page - STMicroelectronics

номер детали RM0319
подробное описание детали  SPEAr320S architecture and functionality
PDF  368 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

RM0319 датащи(HTML) 238 Page - STMicroelectronics

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Synchronous serial ports (SSP)
RM0319
238/368
Doc ID 022640 Rev 3
18.4
Functional description
Figure 86 shows the block diagram of the SSP controller.
Figure 86.
SSP block diagram
18.4.1
APB slave interface
The AMBA APB interface generates read and write decodes for accesses to status and
control registers, and transmit and receive FIFO memories.
18.4.2
Register block
The register block stores data written or to be read across the AMBA APB interface.
SSP1_SS0
Slave select (chip-select)
Out
Slave select (chip-select)
In
SSP2_MOSI
Transmit Data
Out
Receive Data
In
SSP2_MISO
Receive Data
In
Transmit Data
Out
SSP2_CLK
Clock
Out
Clock
In
SSP2_SS0
Slave select (chip-select)
Out
Slave select (chip-select)
In
Table 68.
SSP pin description
SSP Port
SSP in master mode
SSP in slave mode
Function
Direction
Function
Direction
AMBA APB
I/F
Tx FIFO
(8x16)
Rx FIFO
(8x16)
Register
Block
DMA
interface
Clock
Prescaler
Transmit/
Receive
logic
FIFO Status
And
Interrupt
Generation
IRQ
SPI BUS
PCLK



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