Sundance SMT387 User Manual download pdf (Page 17)

Version 1.0.3 Page 17 of 42 SMT387 User Manual

communication from the PC. The Parallel Cable III supports only parallel port

communication from the PC to the Boundary Scan chain.

Memory

Pipelined ZBTRAM

Up to 4MB of pipeline ZBT memory is provided with direct access by the FPGA.

The ZBTRAM is designed to sustain 100% bus bandwidth by eliminating the

turnaround cycle when there is transition from Read to Write, or vice versa.

This device is well suited for SDR applications that experience frequent bus

turnarounds, need to operate on small data chunks (especially one-word chunks),

and need to operate at higher frequencies than permitted by the flow-through

version.

For more complete information, please read:

General Information on how to choose your memory type according to your

application

For the parts datasheet, please read:

ZBTRAM datasheets

Chips parts and densities are shown in the table below.

ZBTRAM part

number

Size in

bits

Size in

Bytes

Actual

Memory

size

Amount of

memory

per board

K7N801801M 8Mb 1MB 512kx18 1MB

K7N161801A 16Mb 2MB 1Mx18 2MB

K7N321801M 32Mb 4MB 2Mx18 4MB

Table 2: ZBTRAM sizes

The total available ZBT RAM on the board is therefore 1 MB, 2 MB, or 4 MB.

Comports

The SMT387 provides 6 Comports, numbered 0, 1, 2, 3, 4, and 5.

These are described in

http://sundance.com/docs/Firmware.pdf

The Comport drives at 3.3v signal levels.

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Sundance SMT387 User Manual Page 17