Primitive: Multi-Region Clock Buffer
Introduction
The BUFMR is a multi-region clock-in/clock-out buffer. The BUFMR replaces the multi-region/bank support of the BUFR and BUFIO available in prior Virtex architectures. There are two BUFMRs in every bank and each buffer can be driven by one specific MRCC in the same bank. The BUFMRs drive the BUFIOs and/or BUFRs in the same region/banks and in the region above and below via the I/O clocking backbone. Do not use a BUFMR when driving BUFRs using clock dividers (not in bypass), but instead use a BUFMRCE component.
Port Descriptions
| Port | Direction | Width | Function |
|---|---|---|---|
| I | Input | 1 | BUFMR clock input pin. Connect to an IBUF input that in turn is directly connected to a MRCC I/O port. |
| O | Output | 1 | BUFMR clock output pin. Connect to BUFIOs and/or BUFRs to be driven in adjacent regions. |
Design Entry Method
| Instantiation | Yes |
| Inference | No |
| IP Catalog | No |
| Macro support | No |
VHDL Instantiation Template
Unless they already exist, copy the following
two statements and paste them before the entity declaration.
Library UNISIM;
use UNISIM.vcomponents.all;
-- BUFMR: Multi-Region Clock Buffer
-- 7 Series
-- Xilinx HDL Language Template, version 2024.2
BUFMR_inst : BUFMR
port map (
O => O, -- 1-bit output: Clock output (connect to BUFIOs/BUFRs)
I => I -- 1-bit input: Clock input (Connect to IBUF)
);
-- End of BUFMR_inst instantiation
Verilog Instantiation Template
// BUFMR: Multi-Region Clock Buffer
// 7 Series
// Xilinx HDL Language Template, version 2024.2
BUFMR BUFMR_inst (
.O(O), // 1-bit output: Clock output (connect to BUFIOs/BUFRs)
.I(I) // 1-bit input: Clock input (Connect to IBUF)
);
// End of BUFMR_inst instantiation
Related Information
- 7 Series FPGAs Clocking Resources User Guide (UG472)