ORSPI4-2FTE1036I Lattice, ORSPI4-2FTE1036I Datasheet - Page 141

• Manufacturer Part Number: ORSPI4-2FTE1036I
• Description: FPGA - Field Programmable Gate Array ORCA FPSC 1.5V SPI4 Interface
• Manufacturer: Lattice

Specifications of ORSPI4-2FTE1036I

• Product Category: FPGA - Field Programmable Gate Array
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Package / Case: FPTBGA-1036
• Minimum Operating Temperature: - 40 C
• Factory Pack Quantity: 60

Lattice Semiconductor
Figure 76. Read Data and Instruction Word Formats
Figure 77. ORSPI4 Memory Controller Interface to FPGA — Read Timing Diagram
The user can write/read instructions into the read instruction FIFO as long as the MC_RIFIFO_FULL flag is low. If
this flag is high, the FIFO can accept one more instruction. The user can start reading data from the read data
FIFO once the MC_RFIFO_EMPTY flag goes low.
It is the responsibility of the user to:
• Maintain count of data from the read data FIFO and check if they match the data length provided in the corre-
• Associate the data received with the address. Data will be received in the same order as they were requested.
The timing diagram for the read interface for a typical read sequence is shown in Figure 77. The read sequence in
this case consists of reading 2 words from location A0 followed by one word each from locations A1, A2, eight
words from A3 and one word from A4 and A5. The MC_RIFIFO_FULL is asserted after the instruction for location
A2 has been written, indicating that only one more instruction may be written to the instruction FIFO. The read
instruction write to access location A4 cannot occur until the MC_RIFIFO_FULL flag is deasserted. The
MC_RDFIFO_EMPTY flag remains high until data has been read from the QDRII SRAM and is available to the
FPGA logic.
F_MC_RCLK
F_MC_RIFIFO_WE
F_MC_RI(23:18)
F_MC_RI(17:0)
MC_RIFIFO_FULL
MC_RDFIFO_EMPTY
F_MC_RDFIFO_RE
MC_RD(71:0)
sponding instruction word
31
71
D0*2
A0
Reserved (low)
D1*1
A1
D2*1
A2
Read Instruction Word
Read Data Word
D3*8
A3
Read Data
24
141
23
Data Length
18
17
ORCA ORSPI4 Data Sheet
D0-0
Address
D0-1
0
0
D1-0
D1-0
D1-0
D4*1
D2-0
A4