Altera RapidIO MegaCore Function - Manual (Page 125)

Chapter 5: Signals 5–11
Transport and Logical Layer Signals
August 2014 Altera Corporation RapidIO MegaCore Function
User Guide
The following parameters are used in some signal width definitions:
■ n = (internal datapath width - 1)
■ m = (internal datapath width/8) - 1
■ k = 6 for 32-bit internal datapath width, and 5 for 64-bit internal datapath width
sys_mnt_s_write Input System maintenance slave write enable
sys_mnt_s_address[16:0] Input
System maintenance slave address bus. This address is a word
address (addresses a 4-byte (32-bit) word), not a byte address.
sys_mnt_s_writedata[31:0] Input System maintenance slave write data bus
sys_mnt_s_readdata[31:0] Output System maintenance slave read data bus
sys_mnt_s_irq Output System maintenance slave interrupt request
Table 5–11. System Maintenance Avalon-MM Slave Interface Signals (Part 2 of 2)
Signal Direction Description
Table 5–12. Maintenance Avalon-MM Master Interface Signals
Signal Direction Description
mnt_m_clk Input
This signal is not used, therefore it can be left open. The Avalon clock is
used internally to sample this interface.
mnt_m_waitrequest Input Maintenance master wait request
mnt_m_read Output Maintenance master read enable
mnt_m_write Output Maintenance master write enable
mnt_m_address[31:0] Output Maintenance master address bus
mnt_m_writedata[31:0] Output Maintenance master write data bus
mnt_m_readdata[31:0] Input Maintenance master read data bus
mnt_m_readdatavalid Input Maintenance master read data valid
Table 5–13. Maintenance Avalon-MM Slave Interface Signals
Signal Direction Description
mnt_s_clk Input
This signal is not used, therefore it can be left open. The Avalon clock is
used internally as the clock reference for this interface.
mnt_s_chipselect Input Maintenance slave chip select.
mnt_s_waitrequest Output Maintenance slave wait request.
mnt_s_read Input Maintenance slave read enable.
mnt_s_write Input Maintenance slave write enable.
mnt_s_address[23:0] Input
Maintenance slave address bus. This address is a word address
(addresses a 4-byte (32-bit) word), not a byte address.
mnt_s_writedata[31:0] Input Maintenance slave write data bus.
mnt_s_readdata[31:0] Output Maintenance slave read data bus.
mnt_s_readdatavalid Output Maintenance slave read data valid.
mnt_s_readerror Output
Maintenance slave read error, which indicates that the read transfer did
not complete successfully. This signal is valid only when the
mnt_s_readdatavalid
signal is asserted.