Achronix Speedster22i HD1000 Development Kit User Guide Uživatelský manuál stáhnout pdf (Strana 40)

40 UG034, July 1, 2014

Controller Interfaces

The Atmel Atmega2560 (U35) controller has the following interfaces for performing several

tasks on the development board.

 Serial interface to the USB port for communications with the development PC

 SD card for uploading bitstreams to the HD1000

 SPI for SFLASH memory control

 Header for configuration

 HD1000 for configuration

These interfaces are shown in Figure 11. Table 12 shows the relevant pins and their

connections.

Table 12: ACX-BRD-HD1000-100G Microcontroller Interfaces and their Connections

Microcontroller – Atmega2560 (U35)

Connection

Interface

Pin Name

Interface

Signal Name

PA1/AD1

Micro-SD Socket

SD_CLK

PA2/AD2

SD_DAT3

PA3/AD3

SD_DAT2

PA4/AD4

SD_DAT1

PA5/AD5

SD_DAT0

PA6/AD6

SD_CMD

SPI

SCK/PCINT1/PB1

Header (J20)

AVR_SCK

MISO/PCINT3/PB3

AVR_PDO

MOSI/PCINT2/PB2

AVR_PDI

SS_N/PCINT0/PB0

AVR_SS

Header

PF4/ADC4/TCK

Header (J43)

AVR_TCK

PF5/ADC5/TMS

AVR_TMS

PF6/ADC6/TDO

AVR_TDO

PF7/ADC7/TDI

AVR_TDI

Memory Interfaces

The board has five off-chip memory interfaces in addition to the removable SD and the

SFLASH.

 One 204-pin SO-DIMM socket (4 GB)

 One DDR3 device (2 Gb)

 Two RLDRAM3 devices (2 x 16 Mbx36)

 One QDR2+ device (72 Mb)

Figure 11 shows the off-chip memory interfaces for the HD1000.

SO-DIMM Socket (J41)

You can use a standard 204-pin DDR3 SO-DIMM (up to 4 GB, 2133 MHz) in the socket (J41)

on the board. HD1000 drives the memory signals using dedicated GPIOs. Achronix provides

1 2 ... 35 36 37 38 39 40 41 42 43 44 45 ... 68 69

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