Cyclone® V Hard Processor System Technical Reference Manual

ID 683126
Date 8/28/2023
Public
Document Table of Contents

8.3.7. System Interconnect Master Properties

The system interconnect connects to various slave interfaces through the L3 interconnect and L3 slave peripheral switch.

Table 37.  System Interconnect Master Interfaces

TrustZone security:

  • Secure: All transactions are marked TrustZone secure
  • Nonsecure: All transactions are marked TrustZone non-secure
  • Per transaction: Transactions can be marked TrustZone secure or TrustZone non-secure, depending on the state of the system interconnect master.

Issuance is based on the number of read, write, and total transactions.

The FIFO buffer depth for AXI is based on the AW, AR, R, W, and B channels. For AHB and APB, the depth is based on W, A, and D channels.

Master Width Clock Switch TrustZone Security GPV Access CDAS Issuance FIFO Buffer Depth16 Type

L2 cache M0

64

mpu_l2_ram_clk

L3 interconnect

Per Transaction

Yes

SSPID

7, 12, 19

2, 2, 2, 2, 2

AXI

FPGA-to-HPS bridge

64

l3_main_clk

L3 interconnect

Per Transaction

Yes

SAS

16, 16, 32

2, 2, 6, 6, 2

AXI

DMA

64

l4_main_clk

L3 interconnect

Per Transaction

No

SSPID

8, 8, 8

2, 2, 2, 2, 2

AXI

EMAC 0/1

32

l4_main_clk

L3 master peripheral switch

Secure

No

SSPID

16, 16, 32

2, 2, 2, 2, 2

AXI

USB OTG 0/1

32

usb_mp_clk

L3 master peripheral switch

Nonsecure

No

SSPID

2, 2, 4

2, 2, 2

AHB

NAND

32

nand_x_clk

L3 master peripheral switch

Nonsecure

No

SSPID

1, 8, 9

2, 2, 2, 2, 2

AXI

SD/MMC

32

l4_mp_clk

L3 master peripheral switch

Nonsecure

No

SSPID

2, 2, 4

2, 2, 2

AHB

ETR

32

dbg_at_clk

L3 master peripheral switch

Per Transaction

No

SSPID

32, 1, 32

2, 2, 2, 2, 2

AXI

DAP

32

dbg_clk

L3 interconnect

Secure

Yes

SS

1, 1, 1

2, 2, 2

AHB

The AXI IDs of the HPS peripheral masters identify transactions from the HPS to soft logic over the HPS-to-FPGA bridge. Soft logic in the FPGA can monitor the AXI IDs to determine which master issued each transaction. For HPS peripheral AXI IDs, refer to "HPS Peripheral Master Input IDs".

16 Each channel has a dedicated FIFO buffer. This allows the channels to function as independent streams.