124 FX3 Programmers Manual, Doc. # 001-64707 Rev. *C
FX3 Serial Peripheral Register Access
9.1.4.7 SPI_SOCKET register
This register is used to select the LPP DMA sockets that are to be used for SPI data transfers in
DMA mode.
9.1.4.8 SPI_RX_BYTE_COUNT register
This register specifies the amount of data to be received from the SPI slave in words, and is applica-
ble only in DMA mode.
9.1.4.9 SPI_TX_BYTE_COUNT register
This register specifies the amount of data to be transmitted to the SPI slave in words, and is applica-
ble only in DMA mode.
9.1.4.10 SPI_ID register
This read-only register provides the block ID and can be used by the firmware to check if the block is
powered on.
Bits Field Name
HW
Access
SW
Access
Default
Value
Description
7:0 EGRESS_SOCKET R RW 0
Socket number for egress data
0 - 7: Supported
Should be set to 4.
15:8 INGRESS_SOCKET R RW 0
Socket number for ingress data
0 - 7: Supported
Should be set to 7.
Bits Field Name
HW
Access
SW
Access
Default Value Description
31:0 WORD_COUNT RW RW 0xFFFFFFFF
Number of words left to read.
0xFFFFFFFF indicates infinite trans-
fer (counter will not decrement).
Bits Field Name
HW
Access
SW
Access
Default Value Description
31:0 WORD_COUNT RW RW 0xFFFFFFFF
Number of words left to write.
0xFFFFFFFF indicates infinite
transfer (counter will not decre-
ment).
Bits Field Name
HW
Access
SW
Access
Default
Value
Description
15:0 BLOCK_ID R 0x0003
A unique number identifying the block in
the memory space.
31:16 BLOCK_VERSION R 0x0001 Version number for the block.
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