r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 1200
r8a77850anbg
Manufacturer Part Number
r8a77850anbg
Description
Renesas 32-bit Risc Microcomputer Superh? Risc Engine Family
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.R8A77850ANBG.pdf
(1692 pages)
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23. Serial Peripheral Interface (HSPI)
23.4.7
The interrupt timing when the flags of the status register (SPSR) and the system control register
(SPSCR) are set is shown in figure 23.7.
If an interrupt cause (receive FIFO halfway, etc.) occurs, it is reflected to the status register
(SPSR) in synchronization with Pck, and an interrupt occurs.
23.4.8
The HSPI operates in synchronization with the bus clock. Module standby mode is
enabled/disabled by the MSTP2 bit of the CPG module standby control register 0 (MSTPCR0).
Take the following steps to enter module standby mode.
1. Check that all data transfers have been completed. The transmit buffer (or FIFO) must be
2. Disable all DMA requests, interrupt requests, and FIFO mode.
3. Set the MSTP2 bit of the standby control register 0 (MSTPCR0).
To activate the HSPI, write 0 to the MSTP2 bit of the standby control register 0 (MSTPCR0).
Rev.1.00 Jan. 10, 2008 Page 1170 of 1658
REJ09B0261-0100
empty and the receive buffer (or FIFO) must be read until the receive buffer becomes empty.
Flags and Interrupt Timing
Low-Power Consumption and Clock Synchronization
Internal interrupt
Flags (SPSR)
HSPI_CLK
HSPI_CS
Interrupt
Pck
Figure 23.7 Flags and Interrupt Timing
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