DR5
The DW_apb_ssi data register is a 16/32-bit (depending on SSI_MAX_XFER_SIZE) read/write buffer for
the transmit/receive FIFOs. If the configuration parameter SSI_MAX_XFER_SIZE is set to 32, then all 32 bits
are valid, otherwise, only 16 bits ([15:0]) of the register are valid. When the register is read, data in the
receive FIFO buffer is accessed. When it is written to, data are moved into the transmit FIFO buffer; a write
can occur only when SSI_EN = 1. FIFOs are reset when SSI_EN = 0.
Module Instance | Base Address | Register Address |
---|---|---|
i_spis_0_ssi_address_block | 0xFFDA2000 | 0xFFDA2074 |
i_spis_1_ssi_address_block | 0xFFDA3000 | 0xFFDA3074 |
Size: 32
Offset: 0x74
Access: RW
Important: The value of a reserved bit must be maintained in software. When you modify registers containing reserved bit fields, you must use a read-modify-write operation to preserve state and prevent indeterminate system behavior.
Bit Fields | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 |
dr5 RW 0x0 |
|||||||||||||||
15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
dr5 RW 0x0 |
DR5 Fields
Bit | Name | Description | Access | Reset |
---|---|---|---|---|
31:0 | dr5 |
Data Register. When writing to this register, you must right-justify the data. Read data are automatically right-justified. If SSI_MAX_XFER_SIZE configuration parameter is set to 32, all 32 bits are valid. Otherwise, only 16 bits ([15:0]) of the register are valid. Read = Receive FIFO buffer Write = Transmit FIFO buffer. |
RW | 0x0 |