Achronix Speedster22i User Macro Guide - Manual (Page 174)

Memories LRAM640
Speedster22i Macro Cell Library Achronix Semiconductor Proprietary PAGE 157
LRAM640 Pins
Table 6-48: LRAM640 Pin Descriptions
Name Type Description
wraddr[5:0] Write Port Address Input.
din[9:0] Write Port Data Input.
wren
Write Port Enable. (active-high) When the Write Port Enable signal is
asserted, the data present on the Write Port Data Input (din[9:0]) is writ-
ten into the memory location addressed by the Write Port Address input
(wraddr[5:0]) at the next active edge of wrclk.
wrclk Write Port Clock. (programmable, default rising edge).
rdaddr[5:0] Read Port Address Input.
rstregn
Read Port Output Register Synchronous Set/Reset (active-low). When
rstregn is asserted, the value of the reg_rstval parameter is written to the
Read Port Output Register upon the next active edge of the rdclk input.
The priority of rstregn input relative to the Read Port Output Register
clock enable (outregce) input is determined by the value of the
regce_priority parameter. The rstregn signal only resets the Read Port
Output register. It does not reset the memory contents.
outregce Read Port Output Register Clock Enable (active-high).
rdclk Read Port Clock. (programmable, default rising edge).
dout[9:0]
Read Port Data Output. The Read Port Data Output is configured to be
either synchronous or asynchronous as determined by the reg_dout
parameter. If the reg_dout parameter is set to 1’b0, the Read Port Data
Output reads the contents of the memory addressed by the Read Port
Address onto the dout[9:0] pins. If the reg_dout parameter is set to 1’b1,
the output of the Read Port Data is driven by the contents of the mem-
ory addressed by the Read Port Address at the next active edge of rclk if
the Read Port Output Clock Enable input is high.
Parameters
Table 6-49: LRAM640 Parameters
Parameter Defined Values Default Value
write_clock_polarity “rise“
read_clock_polarity “rise“
reg_dout 1’b0
reg_initval 10’h0
reg_rstval 10’h0
regce_priority “rstreg”
mem_init 640’hx
mem_init_file “”
input
input
input
input
input
input
input
input
output
“rise”, “fall”
“rise”, “fall”
1’b0,1’b1
10-bit binary or hexadecimal value
10-bit binary or hexadecimal value
“rstreg”, ”regce”
640-bit hexadecimal value