pzbcm_async_handshake

pzbcm_async_handshake

https://github.com/pezy-computing/pzbcm/tree/master/pzbcm_async_handshake

Overview

This module implements CDC synchonizer using the handshake scheme.

Parameters

name	type/width	default value
WIDTH	int	8
TYPE	type	logic [WIDTH-1:0]
STAGES	int	`PZBCM_SYNCHRONIZER_DEFAULT_STAGES
USE_OUT_DATA_RESET	bit	0
INITIAL_OUT_DATA	TYPE	TYPE'(0)

• WIDTH
  • Width of input/output data.
• TYPE
  • Type of input/output data. logic[WIDTH-1:0] is its default.
• STAGES
  • This is specify how many FFs used for CDC.
• USE_OUT_DATA_RESET
  • If this is set to 1 the output FF will be reset when the reset signal is asserted.
• INITIAL_OUT_DATA
  • This is to specify the reset value of the output FF.

IO ports

IO ports

name	direction	width/type	note
is_clk	input	1	source side clock
is_rst_n	input	1	source side reset (async/low active)
is_valid	input	1	indicate is_data is valid
os_ready	output	1	indicate this module can accept is_data
is_data	input	TYPE	input data
id_clk	input	1	destination side clock
id_rst_n	input	1	destination side reset (async/low active)
od_valid	output	1	indicate os_data is valid
id_ready	input	1	indicate the destination side can accept os_data
od_data	output	TYPE	output data