Memory, Pipelined zbtram, Comports – Sundance SMT387 User Manual
Page 17: Table 2: zbtram sizes
Version 1.0.3
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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:
For the parts datasheet, please read:
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
The Comport drives at 3.3v signal levels.