ST52F510FMB6 STMICROELECTRONICS [STMicroelectronics], ST52F510FMB6 Datasheet - Page 97
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ST52F510FMB6
Manufacturer Part Number
ST52F510FMB6
Description
8-BIT INTELLIGENT CONTROLLER UNIT ICU Two Timer/PWMs, ADC, I2C, SPI, SCI
Manufacturer
STMICROELECTRONICS [STMicroelectronics]
Datasheet
1.ST52F510FMB6.pdf
(106 pages)
- Current page: 97 of 106
- Download datasheet (2Mb)
Figure 15.2 Serial Peripheral Interface Block Diagram
Procedure
– Select the SPR0, SPR1 and SPR2 bits to define
– Select the CPOL and CPHA bits to define one of
– The SS pin must be connected to a high level
– The MSTR and SPE bits must be set (they re-
In this configuration the MOSI pin is a data output
and to the MISO pin is a data input.
Transmit sequence
Transmit sequence begins when a byte is written in
the SPI_OUT register.
the serial clock baud rate (see SPI_CR register).
the four relationships between the data transfer
and the serial clock (see Figure 15.4).
signal during the complete byte transmit se-
quence.
main set only if the SS pin is connected to a high
level signal).
MOSI
MISO
SCK
SS
8-Bit Shift Register
Read
Read Buffer
Write
CONTROL
SERIAL
CLOCK
GENERATOR
MASTER
Internal Bus
SPI_OUT
SPI_IN
The data byte is loaded in parallel into the 8-bit shift
register (from the internal bus) during a write cycle
and then shifted out serially to the MOSI pin most
significant bit first.
When data transfer is complete:
– The SPIF bit is set by hardware
– An interrupt is generated if the SPIE bit is set.
During the last clock cycle the SPIF bit is set, a
copy of the data byte received in the shift register
is moved to a buffer. When the SPI_IN register is
read, the SPI peripheral returns this buffered
value. Clearing the SPIF bit is performed by the
following software sequence:
1. An access to the SPI_STATUS_CR register
2. A read to the SPI_IN register.
Note: While the SPIF bit is set, all writes to the
SPI_OUT
SPI_STATUS_CR register is read.
while the SPIF bit is set
SPIE
SPIF WCOL
SPE
register
CONTROL
SPR2
STATE
SPI
OR
MSTR
are
MODF
ST52F510/F513/F514
CPOL
inhibited
-
SPI_STATUS_CR
CPHA
SOD
SPR1
SSM
request
until
IT
SPI_CR
SPR0
SSI
97/106
the
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