
16–32 Chapter 16: Transceiver Reconfiguration Controller IP Core
MIF Format
Altera Transceiver PHY IP Core November 2012 Altera Corporation
User Guide
You can generate MIF files for projects that include bonded or ATT channels using the
following procedure:
1. Create separate 1-channel designs for each frequency TX PLL frequency that your
actual design requires.
2. Compile each design with the Quartus II software.
3. Save the MIF files that Quartus II software generates.
4. Use the MIF files that you have created from your 1-channel designs for
reconfiguration in your design that includes bonded clocks.
MIF Format
The MIF file is organized into records where each record contains the information
necessary to carry out the reconfiguration process. There are two types of records:
non-data records and data records. A MIF can contain a variable number of records,
depending on the target transceiver channel. Both data records and non-data records
are 16-bits long.
For both record types the high-order 5 bits represent the
length
field. A
length
field
of 5’b0, indicates a non-data record which contains an opcode. A length field that is
not zero indicates a data record.
For a non-data record, the opcode is represented by the lower 5-bits in the record.
Table 16–25 lists the supported opcodes and describes the data content.
For data records, the low-order 11 bits provide a logical offset address. In this case, the
length
field indicates the number of data records that are written into the specified
address. For example, if the length field is set to two, the next two records belong the
data record and are written into the offset address.
Table 16–25. Opcodes for MIF Files
Opcode Opcode Description
5’b00000 Reserved
5’b00001 Start of MIF
5’b00010
Channel format indicator specifying the MIF channel type. The following
encodings are defined:
■ 3’b000: Duplex channel
■ 3’b001: TX PLL (CMU)
■ 3’b010: RX only channel
■ 3’b011: TX only channel
■ 3’b100: TX PLL (ATX)
5’b00011 Reference Clock switch
5’b00100 CGB switch
5’b00101-5’b11110 Reserved
5’b11111 End of MIF (EOM)
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